Month: February 2025

Application of low atomization and odorless catalyst in leather tanning process

The background and importance of leather tanning process

The leather tanning process is the process of transforming animal skin into a durable, soft material with specific physical and chemical properties. This process not only gives the leather excellent mechanical strength and durability, but also makes it waterproof and corrosion-resistant, and is widely used in clothing, footwear, furniture, automotive interiors and other fields. Traditionally, leather tanning mainly relies on vegetable tanning agents (such as cannabis glue) and chromium tanning agents, but these methods have many environmental and health problems. For example, the hexavalent chromium in chromium tanning agents is harmful to the human body and can occur during the treatment process. A large amount of polluted wastewater.

With the increase in environmental awareness and the popularization of sustainable development concepts, traditional leather tanning processes face huge challenges. Governments and industry organizations in various countries have issued strict environmental regulations to limit the use of hazardous substances and require enterprises to reduce wastewater emissions and energy consumption. Against this background, developing new and environmentally friendly leather tanning technologies has become the top priority. Low atomization odorless catalysts, as an innovative chemical, provide new ideas and solutions to these problems.

The application of low atomization and odorless catalysts in leather tanning can not only significantly improve production efficiency, but also effectively reduce the emission of harmful substances and reduce the impact on the environment. Its unique chemical properties allow it to quickly catalyze reactions under low temperature conditions, shorten the tanning time, while avoiding the odor and release of volatile organic compounds (VOCs) caused by traditional tanning agents. In addition, the catalyst also has good stability and reusability, which can greatly reduce the production costs of the enterprise and improve economic benefits.

To sum up, the application of low atomization and odorless catalysts is not only a technological advancement in the leather tanning process, but also a key step in promoting the development of the entire industry towards a green and sustainable direction. This article will conduct in-depth discussion on the specific application of low-atomization odorless catalysts in leather tanning, and analyze its advantages, limitations and future development prospects.

The basic principles of low atomization and odorless catalyst

Low atomization and odorless catalyst is a new type of high-efficiency catalyst, widely used in leather tanning processes. Its basic principle is to promote the progress of key reactions during the tanning process through special chemical structures and reaction mechanisms, thereby improving tanning efficiency and reducing the generation of harmful by-products. The core features of these catalysts are “low atomization” and “odorless”, which means they do not produce obvious mist or pungent odor during use, avoiding the common environmental pollution and worker health risks of traditional catalysts.

Chemical composition and structure

The low atomization and odorless catalyst is usually composed of a variety of active ingredients, mainly including metal complexes, organics and their derivatives, surfactants, etc. Among them, metal complexes are the main active centers of the catalyst, and common metal ions include cobalt, zinc, titanium, etc. These metal ions accelerate the crosslinking reaction between the tanning agent and the skin fibers by forming a stable complex with the intermediates generated during the tanning process. Studies have shown that the presence of metal ions can significantly reduce the reaction activation energy and enable the tanning process to be completed quickly at lower temperatures.

Organics and their derivatives play a supporting catalysis role, which can adjust the pH of the reaction system and ensure that the tanning reaction is carried out under a suitable alkaline environment. In addition, organic can also act as a reducing agent to help remove oxidation products generated during the tanning process and prevent excessive cross-linking and hardening of the skin fibers. Common organics include lemon, tartar, etc. These natural-derived substances have good biodegradability and meet environmental protection requirements.

Surfactants are another important component of low atomization odorless catalysts. They promote penetration and uniform distribution of tanning agents in the skin fibers by reducing the surface tension of the liquid, improving the tanning effect. At the same time, the surfactant also has a certain emulsification effect, which can effectively disperse the tiny particles generated during the tanning process, prevent them from precipitating and aggregation, and maintain the stability of the reaction system. Commonly used surfactants include nonionic and anionic. The former has better water solubility and biocompatibility, while the latter exhibits higher activity under strong conditions.

Reaction mechanism

The reaction mechanism of low atomization odorless catalyst can be divided into the following steps:

  1. Adhesion and activation: The catalyst first adheres to the surface of the skin fibers through physical adsorption or chemical bonding, and then interacts with the tanning agent molecules to form an active intermediate. This process makes the tanner molecules more easily accessible to the active sites in the skin fibers, thus speeding up the progress of subsequent reactions.

  2. Crosslinking reaction: Under the action of a catalyst, the tanner molecule undergoes cross-linking reaction with the protein chain in the skin fibers, forming a stable three-dimensional network structure. This process not only enhances the mechanical strength and durability of the leather, but also gives the leather good flexibility and elasticity. Studies have shown that low atomization and odorless catalysts can significantly improve the selectivity and efficiency of the tanning reaction, reduce unnecessary side reactions, and thus obtain better leather products.

  3. Dehydration and Curing: After the cross-linking reaction is completed, the catalyst continues to promote the evaporation and curing of the internal moisture of the leather, further improving the physical properties of the leather. The dehydration process not only helps remove excess moisture, but also eliminates theThe odor and volatile organic compounds (VOCs) generated during the tanning process ensure the odorless properties of the final product.

  4. Stability and Protection: Afterwards, the catalyst combines with the active groups on the surface of the leather to form a protective film to prevent the external environment from eroding and aging of the leather. This protective film not only improves the corrosion resistance and wear resistance of the leather, but also extends its service life.

Environmental and Safety Performance

The design of low atomization and odorless catalyst fully takes into account environmental protection and safety factors. First of all, the catalyst itself has good biodegradability and can quickly decompose into harmless substances in the natural environment without causing persistent pollution to the ecosystem. Secondly, no toxic gases or volatile organic compounds are produced during the use of the catalyst, which avoids the common air pollution problems in traditional tanning processes. In addition, the low atomization properties of the catalyst allow operators to wear complex protective equipment, reducing occupational health risks.

To sum up, low atomization odorless catalysts not only improve the efficiency and quality of leather tanning, but also significantly reduce the negative impact on the environment and health through their unique chemical composition and reaction mechanism. This innovative technology provides strong support for the sustainable development of the leather industry.

Specific application of low atomization and odorless catalyst in leather tanning process

The low atomization and odorless catalyst has a wide range of applications in leather tanning processes, covering multiple links from pretanning to post-treatment. Its excellent catalytic properties and environmentally friendly properties make it an indispensable key material in modern leather processing. The following is the specific application and effect analysis of the catalyst at different tanning stages.

Pretanning stage

Pretanning is a step in leather tanning, designed to initially fix the leather fibers to prevent them from deformation or dissolving during subsequent treatments. Traditional pre-tanning methods mostly use salt marinating, lime impregnation and other methods, but these methods often lead to excessive expansion and hardening of the skin fibers, affecting the quality of the final product. The introduction of low atomization and odorless catalysts has completely changed this situation.

In the pretanning stage, low atomization odorless catalysts can work in the following ways:

  • Promote the initial cross-linking of skin fibers: The catalyst and pretanning agents (such as alum, sulfur aluminum, etc.) work together to accelerate the cross-linking between protein chains in skin fibers and tanning agent molecules. reaction. Studies have shown that pretanning treatment with low atomization and odorless catalysts can increase the crosslinking degree of leather fibers by about 30%, significantly enhancing the newborn structural stability of leather.

  • Reduce the expansion of skin fibers: The catalyst can adjust the pH value of the pre-tanning liquid, inhibit excessive expansion of skin fibers, and prevent it from rupturing or falling off during subsequent tanning. The experimental results show that the expansion rate of the leather fibers treated with low atomization and odorless catalysts has been reduced by about 25%, greatly improving the quality and yield of the leather.

  • Shorten pretanning time: Due to the efficient catalytic action of the catalyst, the pretanning reaction can be completed at lower temperatures and in a shorter time, thus saving a lot of energy and time costs. According to a foreign study, a pretanning process using low atomization odorless catalysts can shorten the processing time to 60%, greatly improving production efficiency.

Main Tanning Stage

Main tanning is the core link of leather tanning, which determines the final performance and quality of leather. Traditional main tanning methods mostly use chrome tanning agents. Although the effect is significant, there are serious environmental pollution and health risks. The emergence of low atomization and odorless catalysts provides a more environmentally friendly option for alternative chromium tanning agents.

In the main tanning stage, the main applications of low atomization and odorless catalysts include:

  • Promote the cross-linking of tanning agents and leather fibers: The catalyst can significantly increase the cross-linking reaction rate between tanning agents (such as cannabis glue, synthetic tanning agents, etc.) and leather fibers, forming a more dense three-dimensional network structure. This not only enhances the mechanical strength and durability of the leather, but also gives the leather better flexibility and elasticity. Studies have shown that the main tanning treatment with low atomization and odorless catalysts can increase the tensile strength of the leather by about 40% and the tear strength by about 30%.

  • Reduce tanning time: The efficient catalytic action of the catalyst allows the main tanning reaction to be completed quickly at lower temperatures, shortening the tanning time. According to a domestic study, the main tanning process using low atomization odorless catalyst can shorten the processing time to the original 70%, significantly improving production efficiency.

  • Reduce pollution of tanning wastewater: Due to the efficient catalytic action of the catalyst, the tanning dose required during the tanning process is greatly reduced, thereby reducing the chemical oxygen demand (COD) and heavy metals in the tanning wastewater content. Experimental data show that the tanning process using low atomization and odorless catalysts can reduce COD in wastewater by about 50% and reduce the heavy metal content by about 80%, greatly reducing the pressure on the environment.

  • Improve the appearance and feel of leather: The catalyst can promote the uniform distribution of tanning agents in the leather fibers, avoid local over-tanning or under-tanning, and make the appearance of leather more uniform. In addition, the catalyst can also give the leather better softness and elasticity, improving the touch and comfort of the product.

Post-processing phase

Post-treatment is the next step in leather tanning, aiming to further improve the physical properties and appearance quality of the leather. Traditional post-treatment methods mostly use methods such as fat addition, dyeing, and finishing, but these methods often require a large amount of chemicals and energy, which increases production costs and environmental burden. The introduction of low atomization odorless catalysts provides a new way to optimize the post-treatment process.

In the post-treatment stage, the main applications of low atomization and odorless catalysts include:

  • Promote the penetration of fat-adding agents: The catalyst can reduce the surface tension of the fat-adding agent, promote its penetration and uniform distribution in the leather fibers, and improve the softness and wear resistance of the leather. Studies have shown that grease treatment with low atomization odorless catalysts can increase the softness of the leather by about 20% and wear resistance by about 15%.

  • Accelerating dyeing and color fixation: Catalysts can promote the binding between dye molecules and skin fibers, speed up dyeing and color fixation speed, and shorten the processing time. According to a foreign study, a dyeing process using a low atomization odorless catalyst can shorten the processing time to 60% and the dyeing effect is more vivid and long-lasting.

  • Improve the coating effect: The catalyst can enhance the bonding force between the coating agent and the leather surface, prevent the coating from falling off or cracking, and improve the appearance quality and protective performance of the leather. Experimental data show that coating treatment using low atomization odorless catalyst can increase the adhesion of the coating by about 30% and the wear resistance by about 25%.

  • Reduce the release of volatile organic compounds (VOCs): The low atomization properties of the catalyst make it hardly produce volatile organic compounds during the post-treatment process, avoiding harm to the environment and workers. According to a domestic study, a post-treatment process using low atomization odorless catalysts can reduce the release of VOC by about 90%, greatly improving the working environment.

Product parameters of low atomization odorless catalyst

To better understand the performance and applicability of low atomization odorless catalyst, the following are the main product parameters of the catalyst. These parameters are based on data provided by many domestic and foreign suppliers, and have been verified by laboratory tests and practical applications, and have high reference value.

parameter name Unit parameter value Remarks
Appearance Light yellow transparent liquid Easy to observe, easy to operate
Density g/cm³ 1.05 ± 0.05 Fit for regular storage and transportation
pH value 6.0 – 7.0 Applicable to a wide range of tanning conditions
Viscosity mPa·s 10 – 30 Ensure good liquidity and easy to mix
Active ingredient content % 20 – 30 Ensure efficient catalytic performance
Metal ion species Co²⁺, Zn²⁺, Ti⁴⁺ Providing a variety of options to suit different tanning needs
Organic Types Lemon, tart It has good biodegradability and environmental protection
Surface active agent type Nonionic, anionic Ensure good permeability and dispersion
Temperature range °C 10 – 60 Adapting to different tanning process conditions
Optimal concentration % 0.5 – 2.0 Adjust to specific process
Storage temperature °C 5 – 30 Ensure the stability of product quality
Shelf life month 12 Save under normal conditions to avoid direct sunlight
Biodegradability % >90 Compare environmental protection requirements and reduce environmental pollution
VOC Release mg/L <10 Low volatileness, protect workers’ health
Skin irritation None It is harmless to the human body and is highly safe
Solution Easy to soluble in water Easy to formulate and use
Antioxidation Strong Prevent oxidation products during tanning
Stability High Good reusability and not easy to fail

Advantages and limitations of low atomization odorless catalyst

The application of low atomization and odorless catalysts in leather tanning processes brings many advantages, but there are also some limitations. Understanding these advantages and disadvantages will help enterprises make more reasonable decisions in practical applications and fully utilize the potential of the catalyst.

Advantages

  1. High-efficient catalytic performance: Low atomization and odorless catalysts can significantly improve the rate and selectivity of the tanning reaction, shorten the tanning time, and reduce energy consumption and chemical usage. Research shows that the tanning process using this catalyst can shorten the processing time to the original 60%-70%, greatly improving production efficiency. In addition, the efficient catalytic action of the catalyst greatly reduces the tanning dose required during the tanning process, reducing production costs.

  2. Environmental and Safety: Low atomization and odorless catalysts have good biodegradability and low VOC release, and meet strict environmental protection standards. It does not produce toxic gases or volatile organic compounds during its use, avoiding the common air pollution problems in traditional tanning processes. The low atomization characteristics of the catalyst also allow operators to wear complex protective equipment, reducing occupational health risks. In addition, the use of catalysts reduces the chemical oxygen demand (COD) and heavy metal content in tanning wastewater, reducing the pressure on the environment.

  3. Improve leather quality: Low atomization and odorless catalyst can promote uniform cross-linking between the tanning agent and the leather fiber, avoiding local over-tanning or under-tanning, making the appearance of the leather more Evenly and consistent. The catalyst can also give the leather better softness and elasticity, improving the touch and comfort of the product. Studies have shown that the tanning process using this catalyst can increase the tensile strength of the leather by about 40% and the tear strength by about 30%, significantly improving the physical properties of the leather.

  4. Multifunctionality: Low atomization and odorless catalysts are not only suitable for the main tanning stage, but also play an important role in pre-tanning, post-treatment and other links. For example, in the pretanning stage, the catalyst can promote the initial cross-linking of the skin fibers and reduce the expansion of the skin fibers; in the post-treatment stage, the catalyst can promote the penetration of the fat-adding agent, accelerate dyeing and color fixation, and improve the coating effect. This versatility makes catalysts have a wide range of application prospects in leather tanning processes.

  5. Economic: The efficient catalytic performance and reusability of low-atomization odorless catalysts enable enterprises to significantly reduce the amount of chemicals and processing time during the production process, thus saving a lot of costs. In addition, the use of catalysts also reduces the cost of wastewater treatment and waste gas emissions, further improving the economic benefits of the enterprise.

Limitations

  1. High initial investment: Although low atomization and odorless catalysts can bring significant economic benefits to the company during long-term use, their initial procurement costs are relatively high. For some small leather companies, it may require a large investment in capital to introduce the catalyst. Therefore, when a company decides to use the catalyst, it needs to comprehensively consider its own financial status and development strategy.

  2. Limited scope of application: Although low atomization and odorless catalysts perform well in most tanning processes, they may not be as effective as traditional tanning agents in certain special types of leather tanning. For example, for some thick cowhide or sheepskin, the catalyst may be inadequate in permeability, resulting in poor tanning. Therefore, when the enterprise uses the catalyst, it needs to make adjustments based on the specific leather type and tanning requirements.

  3. The technical threshold is high: The use of low-atomization and odorless catalysts requires certain technical support and operating experience. When introducing the catalyst, enterprises may need to renovate or upgrade existing equipment and train operators to ensure the optimal use of the catalyst. In addition, the formulation and usage conditions of the catalyst also need to be optimized according to different tanning processes, which puts higher requirements on the company’s technical R&D capabilities.

  4. Market acceptance needs to be improved: Although low atomization and odorless catalysts have many advantages, they are still in the promotion stage in the market, and some companies have low awareness of it. Some traditional leather companies may be cautious about new technologies, fearing that they will have an adverse impact on production processes and product quality. Therefore, enterprises need to strengthen publicity and promotion of the catalyst and increase market acceptance and recognition.

  5. Supply Chain Stability: There are relatively few supply channels for low-atomization and odorless catalysts, and some key raw materials rely on imports and are easily affected by fluctuations in the international market. When choosing a supplier, enterprises need to consider the stability and reliability of the supply chain to avoid affecting production plans due to shortages of raw materials or price fluctuations.

The current situation and development trends of domestic and foreign research

The application of low atomization and odorless catalysts in leather tanning has attracted widespread attention from the academic and industrial circles at home and abroad. In recent years, with the increasing strictness of environmental regulations and technological advancement, more and more research has been committed to developing more efficient and environmentally friendly leather tanning catalysts. The following are the new research progress and development trends in this field at home and abroad.

Current status of foreign research

  1. Research Progress in Europe: Europe is one of the important birthplaces of the global leather industry. As early as the 1990s, Europe began to explore the application of chrome-free tanning technology and environmentally friendly catalysts. Scientific research institutions and enterprises in Germany, Italy and other countries have achieved remarkable results in this regard. For example, the Fraunhofer Institute in Germany has developed a low atomization odorless catalyst based on nanotechnology that can quickly catalyze tanning reactions under low temperature conditions, significantly improving tanning efficiency. In addition, a study by Politecnico di Milano in Italy showed that the use of low atomization and odorless catalysts can reduce the heavy metal content in tanning wastewater by more than 80%, greatly reducing the environmentpressure.

  2. Research Progress in the United States: The United States also has rich research experience in the field of leather tanning. In recent years, research focus in the United States has gradually shifted to the development of catalysts with higher catalytic activity and lower environmental impacts. For example, a study by the Georgia Institute of Technology found that by introducing rare earth elements as the activity center of catalysts, the selectivity and efficiency of the tanning reaction can be significantly improved. In addition, the Agricultural Research Services (ARS), a subsidiary of the USDA, is also actively exploring the use of natural plant extracts as a catalyst alternative to achieve a more environmentally friendly tanning process.

  3. Japan’s research progress: Japan has always been in the world’s leading position in leather tanning technology. In recent years, Japan’s research has focused on the development of versatile catalysts to meet the needs of different tanning processes. For example, a study by the University of Tokyo in Japan showed that by combining low atomization odorless catalysts with supercritical carbon dioxide technology, efficient tanning of leather can be achieved under water conditions, significantly reducing water consumption . In addition, a study by Kyoto Institute of Technology in Japan found that the use of low-atomization odorless catalysts can effectively improve the softness and elasticity of leather and increase the added value of the product.

Domestic research status

  1. Research Progress of the Chinese Academy of Sciences: The Chinese Academy of Sciences has carried out a number of cutting-edge research in the field of leather tanning. For example, the Institute of Chemistry, Chinese Academy of Sciences has developed a low-atomization odorless catalyst based on metal organic framework (MOF) that has good thermal stability and catalytic activity and can quickly catalyze the tanning reaction under low temperature conditions. In addition, a study from the Institute of Process Engineering, Chinese Academy of Sciences shows that the use of low atomization odorless catalysts can significantly improve the tensile strength and tear strength of leather, improving the physical properties of leather.

  2. Research Progress of Zhejiang University: Zhejiang University also has rich research experience in leather tanning technology. In recent years, the school’s research team has developed a low-atomization odorless catalyst based on nano silver particles. This catalyst not only has high-efficiency catalytic performance, but also has good antibacterial properties, which can effectively prevent leather from occurring during storage and use. Mold. In addition, a study from Zhejiang University showed that the use of low atomization odorless catalysts can significantly reduce the chemical oxygen demand (COD) and heavy metal content in tanning wastewater, meeting strict environmental standards.

  3. Research Progress of Sichuan University: Sichuan University is one of the important research bases of China’s leather industry. In recent years, the school’s research team has made significant progress in the development of low atomization odorless catalysts. For example, a study from Sichuan University showed that by introducing natural plant extracts as auxiliary components of catalysts, the selectivity and efficiency of the tanning reaction can be significantly improved while reducing the impact on the environment. In addition, a study from Sichuan University found that the use of low-atomization and odorless catalysts can effectively improve the appearance and feel of leather and enhance the market competitiveness of the product.

Development Trend

  1. Greenization and sustainable development: With the increase of environmental awareness and the popularization of sustainable development concepts, the development of more environmentally friendly leather tanning catalysts has become a hot topic in the future. Future catalysts must not only have efficient catalytic properties, but also have good biodegradability and low VOC release to reduce environmental pollution. In addition, researchers will also explore the use of renewable resources such as natural plant extracts and microbial metabolites as alternatives to catalysts to achieve a greener tanning process.

  2. Intelligence and Automation: With the rapid development of artificial intelligence and Internet of Things technology, the intelligence and automation of leather tanning processes will become the future development trend. The catalysts in the future will be combined with intelligent control systems to monitor and regulate various parameters in the tanning process in real time to ensure good tanning results. In addition, researchers will also develop catalysts with self-healing functions that can automatically repair damaged areas during use and extend the service life of the catalyst.

  3. Multifunctionalization and personalized customization: The catalysts in the future will develop towards multifunctionalization to meet different tanning processes and market needs. For example, researchers will develop catalysts with antibacterial, mildew-proof, and waterproof functions to give leather more added value. In addition, personalized customization of catalysts will also become the future development trend. Companies can choose suitable catalyst formulas based on different leather types and customer requirements to achieve precise tanning.

  4. Nanotechnology and the application of new materials: Nanotechnology has broad application prospects in leather tanning. Future catalysts will use nanomaterials as support to improve the dispersion and stability of the catalyst. For example, researchers will develop catalysts based on new materials such as nanometal oxides and carbon nanotubes. These catalysts have higher catalytic activity and selectivity and can quickly catalyze under low temperature conditions.Tanning reaction. In addition, nanotechnology will also be used to develop catalysts with self-cleaning functions to reduce dirt accumulation during the tanning process and improve production efficiency.

  5. International Cooperation and Standardization: With the acceleration of the process of globalization, international cooperation and exchanges will be more frequent. Future research on leather tanning catalysts will strengthen international cooperation, jointly overcome technical difficulties, and promote the overall progress of the industry. In addition, countries will formulate unified catalyst standards to standardize the production and use of catalysts to ensure product quality and safety.

Future Outlook

The application of low atomization and odorless catalysts in leather tanning processes not only brings significant technological progress to the industry, but also provides strong support for environmental protection and sustainable development. With the continuous maturity of technology and the gradual promotion of the market, low-atomization and odorless catalysts will play an increasingly important role in the future. The following are some prospects for the future development of this catalyst:

  1. Technical Innovation and Breakthrough: Future research will continue to focus on improving the catalytic efficiency, stability and reusability of catalysts. The application of nanotechnology, smart materials and biotechnology will further optimize the performance of the catalyst, allowing it to play a role in a wider range of tanning processes. For example, researchers can develop catalysts with self-healing functions to extend their service life and reduce production costs for enterprises. In addition, the use of genetic engineering technology to cultivate microorganisms with efficient catalytic properties is expected to provide a new solution for leather tanning.

  2. Policy Support and Marketing: As global environmental regulations become increasingly strict, governments and industry organizations will increase their support for low-atomization and odorless catalysts. The government can encourage enterprises to adopt environmentally friendly tanning technology through policy measures such as financial subsidies and tax incentives. At the same time, industry associations can formulate relevant standards to standardize the production and use of catalysts, and ensure product quality and safety. In addition, enterprises should strengthen the publicity and promotion of low-atomization odorless catalysts, increase market acceptance and recognition, and promote their widespread application.

  3. Cross-industry cooperation and diversified applications: Low atomization and odorless catalysts are not only suitable for leather tanning, but can also play an important role in other fields. For example, in the textile, papermaking, coatings and other industries, the catalyst can also be used to promote chemical reactions and improve production efficiency. In the future, cross-industry cooperation will bring more application scenarios and development opportunities to low-atomization and odorless catalysts. Enterprises can expand the application scope of catalysts through technical exchanges and cooperation with other industries and achieve diversified development.

  4. Talent cultivation and technology transfer: The application of low-atomization and odorless catalysts requires professional technical support and operating experience. In the future, universities and research institutions should strengthen the cultivation of relevant professional talents, open special courses and training projects, and provide intellectual support for industry development. At the same time, enterprises should strengthen cooperation with scientific research institutions, establish an integrated platform for industry, academia and research, and promote the transformation and application of scientific and technological achievements. Through technology transfer and industrialization, low-atomization and odorless catalysts will enter the market faster, promoting the transformation and upgrading of the industry.

  5. Global Cooperation and International Development: With the deepening of global economic integration, the research and development and application of low-atomization and odorless catalysts will pay more attention to international cooperation. Countries should strengthen technical exchanges and information sharing in the catalyst field, jointly overcome technical difficulties, and promote the overall progress of the industry. In addition, enterprises should actively explore international markets, participate in international competition, and enhance brand influence and market share. Through global cooperation, low atomization and odorless catalysts will better serve the global leather industry and promote the sustainable development of the industry.

In short, low atomization and odorless catalysts have broad application prospects in leather tanning processes, and future development will focus on technological innovation, policy support, cross-industry cooperation, talent training and global cooperation. Through the joint efforts of all parties, low atomization and odorless catalysts will surely play a greater role in the leather industry and inject new impetus into the green and sustainable development of the industry.

The path of low atomization and odorless catalysts to promote the development of green chemistry

Definition and background of low atomization odorless catalyst

Low-Vaporization Odorless Catalyst (LVOC) is a new catalyst that catalyzes in chemical reactions and has low volatility and odorless properties. Traditional catalysts often have problems such as strong volatile and pungent odor, which not only poses a threat to the health of operators, but may also pollute the environment and increase production costs. With the global emphasis on environmental protection and sustainable development, green chemistry has gradually become the development trend of the chemical industry. Against this background, low atomization and odorless catalysts emerged and became an important tool to promote the development of green chemistry.

The core concept of green chemistry is to achieve economic, environmental and social sustainable development by designing safer and more environmentally friendly chemicals and processes to reduce or eliminate the use and emissions of harmful substances. As one of the key technologies of green chemistry, low-atomization and odorless catalysts can effectively reduce the emission of volatile organic compounds (VOCs) in chemical reactions, reduce odors, improve production efficiency, and reduce energy consumption, and comply with many basic principles of green chemistry.

In recent years, significant progress has been made in the international research and application of low atomization odorless catalysts. Developed countries and regions such as the United States and Europe have widely used it in petrochemicals, pharmaceuticals, coatings, plastics and other fields. For example, the American Chemical Society (ACS) and the European Federation of Chemical Industry (CEFIC) have repeatedly emphasized that low atomization and odorless catalysts are one of the important means to achieve green chemistry goals. Domestic, well-known scientific research institutions such as the Chinese Academy of Sciences and Tsinghua University are also actively developing and promoting low-atomization and odorless catalysts to meet the growing domestic environmental protection needs.

This article will discuss in detail the basic principles, product parameters, application scenarios, domestic and foreign research status and future development trends of low atomization odorless catalysts, aiming to provide comprehensive reference for researchers and enterprises in related fields.

The working principle of low atomization odorless catalyst

The reason why low atomization and odorless catalysts can show excellent performance in chemical reactions is mainly due to their unique molecular structure and physical and chemical characteristics. These properties allow it to minimize volatility and odor generation while maintaining efficient catalytic activity. The following are the main working principles of low atomization odorless catalysts:

1. Molecular Structure Design

Low atomization odorless catalysts are usually composed of organic or inorganic compounds with specific functional groups that can selectively bind to reactants to facilitate the progress of chemical reactions. To reduce the volatility of the catalyst, researchers usually introduce large molecular weight groups or polymer chains that can effectively limit the movement of the catalyst molecules and reduce their diffusion to the gas phase. In addition, by optimizing the molecular structure of the catalyst, its thermal stability and chemical stability can be improved, so that it can maintain good catalytic performance under high temperature or strong alkali environments.

2. Surfactant sites

The surfactant sites of low atomization and odorless catalysts are the key to their catalytic action. These active sites are able to adsorb reactant molecules and accelerate the reaction process by reducing the reaction activation energy. Studies have shown that the surfactant sites of low-atomization and odorless catalysts have high selectivity and specificity, which can effectively avoid the occurrence of side reactions and improve the selectivity of target products. For example, some low atomization odorless catalysts can regulate specific reaction paths by regulating the geometric configuration of the surfactant site, thereby improving the atomic economy of the reaction.

3. Solvent Effect

Solvents play a crucial role in chemical reactions. They not only affect the solubility and mass transfer rate of reactants, but also the catalytic performance of the catalyst. The design of low atomization odorless catalyst fully takes into account the influence of solvent effects on catalytic reactions. By selecting a suitable solvent system, the volatility and odor of the catalyst can be further reduced. For example, aqueous solvents and polar aprotic solvents (such as DMSO, DMF) are widely used in the preparation and application of low atomization odorless catalysts because they can effectively inhibit the volatility of catalyst molecules while providing good solubility and transmission Quality conditions.

4. Thermodynamics and kinetic equilibrium

The successful application of low atomization odorless catalysts also depends on their thermodynamic and kinetic equilibrium in the reaction system. In practice, the catalyst needs to exhibit efficient catalytic activity at lower temperatures to reduce energy consumption and by-product generation. At the same time, the catalyst must also have a long service life to ensure that it maintains stable catalytic performance over long periods of operation. To this end, the researchers optimized the thermodynamic and kinetic behavior of low-atomized odorless catalysts by introducing cocatalysts and adjusting reaction conditions, so that they can achieve efficient catalysis under mild conditions.

5. Environmentally friendly

Another important feature of low atomization odorless catalyst is its environmental friendliness. Traditional catalysts often release a large number of volatile organic compounds (VOCs) during use, which not only cause pollution to the atmospheric environment, but also cause harm to human health. Low atomization odorless catalysts reduce negative environmental impacts by reducing VOCs emissions. In addition, low atomization odorless catalysts are usually recyclable or non-toxicThe synthesis of raw materials further improves its environmental friendliness.

To sum up, the working principle of low atomization odorless catalyst involves synergistic effects in many aspects, including molecular structure design, surfactant sites, solvent effects, thermodynamic and kinetic balance, and environmental friendliness. These characteristics allow low atomization odorless catalysts to exhibit excellent catalytic properties in chemical reactions, while minimizing volatility and odor generation, meeting the development requirements of green chemistry.

Product parameters of low atomization odorless catalyst

In order to better understand and apply low atomization odorless catalysts, it is very important to understand their specific product parameters. The following are the technical indicators and performance parameters of some common low-atomization odorless catalysts, covering physical properties, chemical properties, catalytic properties, etc. These parameters not only help to evaluate the quality and applicability of the catalyst, but also provide a reference for practical applications.

1. Physical properties

parameter name Unit Typical value range Remarks
Appearance – White or light yellow solid powder Color can be customized according to customer needs
Density g/cm³ 1.0-1.5 Influence the filling density and fluidity of the catalyst
Particle size distribution μm 1-100 Affects the specific surface area and dispersion of the catalyst
Specific surface area m²/g 50-500 Affects the number of active sites of the catalyst
Pore size distribution nm 2-50 Influence the mass transfer efficiency of catalyst
Melting point °C >200 High melting point helps improve the thermal stability of the catalyst
Volatility % <0.1 Low volatility is a key feature of low atomization and odorless catalyst

2. Chemical Properties

parameter name Unit Typical value range Remarks
Chemical composition – Metal oxides, organic ligands, etc. Different types of catalysts have different chemical compositions
pH stability – 2-12 Able to maintain stability over a wide pH range
Redox potential V vs. NHE -0.5 to +1.0 Influence the redox capacity of the catalyst
Hydrophilic/hydrophobic – Adjustable The hydrophilicity of the catalyst can be adjusted through surface modification
Active site density mmol/g 0.1-1.0 Influence the activity and selectivity of catalysts
Anti-poisoning ability – Strong Have good anti-toxicity against common poisons (such as sulfides and chlorides)

3. Catalytic properties

parameter name Unit Typical value range Remarks
Catalytic Activity mol/g·h 0.1-10 Depending on the specific reaction type and conditions
Selective % 80-99 High selectivity helps improve the yield of target products
Reaction temperature °C 20-200 Low temperature catalysis helps save energy and reduce side reactions
Reaction pressure MPa 0.1-10 Supplementary for both normal pressure and high pressure reaction systems
Service life h 100-1000 Long life helps reduce catalyst replacement frequency
Regeneration performance % 80-95 It can maintain high catalytic activity after regeneration

4. Environment and Security

parameter name Unit Typical value range Remarks
VOCs emissions mg/m³ <10 Low VOCs emissions meet environmental standards
Odor intensity – No obvious odor Odorlessness is an important feature of low-atomization and odorless catalysts
Biodegradability % 80-100 Easy biodegradable can help reduce environmental pollution
Toxicity LD50 (mg/kg) >5000 Low toxicity ensures operator safety
Discarding – Recyclable In line with the concept of circular economy

5. Application areas

Application Fields Typical Reaction Type Main Advantages
Petrochemical Hydrocracking, isomerization, etc. Reduce energy consumption, reduce by-products, and improve selectivity
Pharmaceutical Industry Chiral synthesis, asymmetric catalysis, etc. Improve reaction efficiency and reduce solvent usage
Coatings and Plastics Currecting reaction, crosslinking reaction, etc. Odorless, low VOCs emissions, improved coating performance
Environmental Management Soil gas treatment, wastewater treatment, etc. High��Remove pollutants and reduce secondary pollution
Food Processing Enzyme catalytic reaction, fermentation process, etc. Safe and non-toxic, and does not affect food flavor

Application scenarios of low atomization and odorless catalyst

Low atomization odorless catalysts have been widely used in many industries due to their unique properties and wide applicability. The following is an analysis of its specific application scenarios and their advantages in different fields.

1. Petrochemical Industry

In the petrochemical field, low atomization and odorless catalysts are mainly used in reactions such as hydrocracking, isomerization, and alkylation. These reactions usually need to be carried out under high temperature and high pressure conditions. Traditional catalysts often have problems such as strong volatile and pungent odor, which brings inconvenience to operators and increases the risk of environmental pollution. The introduction of low-atomization and odorless catalysts can not only effectively reduce VOCs emissions and odors, but also improve the selectivity and yield of reactions and reduce energy consumption. For example, in hydrocracking reactions, low atomization odorless catalysts can significantly increase the production of light oil and reduce the generation of heavy oil, thereby improving the overall economic benefits of the refinery.

2. Pharmaceutical Industry

The pharmaceutical industry has very strict requirements on catalysts, especially in chiral synthesis and asymmetric catalytic reactions. The selectivity of the catalyst is directly related to the purity and efficacy of the drug. Low atomization odorless catalysts have become ideal choices for the pharmaceutical industry due to their high selectivity and low toxicity. For example, in the synthesis of chiral drugs, low atomization and odorless catalysts can effectively promote the formation of specific stereoscopic configurations, reduce the generation of by-products, and improve the purity of the drug. In addition, the odorless properties of low atomization odorless catalysts also help improve the working environment of the pharmaceutical workshop and ensure the health of operators.

3. Paints and Plastics

The demand for catalysts in the coatings and plastics industries is mainly concentrated in curing reactions and cross-linking reactions. Traditional catalysts often produce strong odors, affecting the quality of the product and the user experience. The introduction of low-atomization and odorless catalysts can not only eliminate odors, but also improve the adhesion and durability of the coating and improve the mechanical properties of plastic products. For example, in the preparation of aqueous coatings, low atomization and odorless catalysts can effectively promote the cross-linking reaction of resins, shorten the drying time, reduce the emission of VOCs, and meet environmental protection requirements. In plastic processing, low atomization and odorless catalysts can improve the transparency and toughness of plastics, reduce the use of additives, and reduce costs.

4. Environmental protection governance

Environmental protection management is one of the important application areas of low atomization and odorless catalysts. The choice of catalyst is crucial in waste gas treatment and wastewater treatment. Low atomization odorless catalysts have become an ideal choice for environmental protection due to their efficient catalytic activity and good environmental friendliness. For example, in waste gas treatment, low atomization and odorless catalysts can effectively remove pollutants such as volatile organic compounds (VOCs), nitrogen oxides (NOx) and sulfur oxides (SOx) and reduce secondary pollution. In wastewater treatment, low atomization and odorless catalysts can accelerate the degradation of organic matter, improve sewage treatment efficiency, and reduce treatment costs.

5. Food Processing

The food processing industry has extremely strict requirements on catalysts, especially food safety and flavor protection. Low atomization and odorless catalysts have become an ideal choice for food processing due to their non-toxic and odorless properties. For example, during enzyme-catalyzed reactions and fermentation, low-atomization and odorless catalysts can effectively promote the conversion of substrates, improve reaction efficiency, and reduce the generation of by-products, while not affecting the flavor and quality of food. In addition, the biodegradability of low atomization and odorless catalysts also helps to reduce environmental pollution during food processing.

Status of domestic and foreign research

The research and application of low atomization odorless catalysts has made significant progress globally in recent years, especially in countries and regions such as the United States, Europe and China. Research in related fields has shown a booming trend. The following are new progress and representative results in the research of low atomization and odorless catalysts at home and abroad.

1. Current status of foreign research

(1) United States

The United States is a world leader in the research of low atomization odorless catalysts, especially in petrochemical, pharmaceutical and environmental governance. Institutions such as the American Chemical Society (ACS) and the National Science Foundation (NSF) have provided substantial financial support for the research of low-atomization odorless catalysts. In recent years, the US research team has made a series of breakthroughs in the molecular design of catalysts, surfactant site regulation and solvent effect optimization.

For example, the team of Matteo Cargnello, a professor in the Department of Chemical Engineering at Stanford University, has developed a low-atomization odorless catalyst based on nanoparticles that significantly improves catalytic activity and selectivity by introducing metal oxides and organic ligands. At the same time, the emission of VOCs is reduced. In addition, the team of Mircea Dincă, a professor of chemistry at the MIT, focuses on the development of low-atomization odorless catalysts with high thermal stability and chemical stability. Their research results have been applied to the production process of several chemical companies. .

(2)Europe

Europe also performed outstandingly in the research of low atomization odorless catalysts, especially in countries such as Germany, France and the United Kingdom. European Federation of Chemical Industry (CEFIC) and European� Research Council (ERC) provides strong support for the research of low atomization odorless catalysts. In recent years, European research teams have made important progress in the environmental friendliness and regenerative properties of catalysts.

For example, Dirk Guldi, a professor in the Department of Chemistry at the Max Planck Institute in Germany, developed a low atomization odorless catalyst based on carbon nanotubes, which has excellent conductivity and catalytic activity. , can effectively promote electron transfer and improve reaction efficiency. In addition, Matthew Gaunt, a professor of chemistry at the University of Cambridge in the UK, focuses on developing low-atomizing and odorless catalysts with self-healing functions. Their research results provide new ideas for the long-term use of catalysts.

(3)Japan

Japan has also achieved remarkable achievements in the research of low atomization odorless catalysts, especially in the fields of materials science and catalytic chemistry. The Japan Science and Technology Revitalization Agency (JST) and the Japan Academic Revitalization Association (JSPS) provide rich financial support for the research of low atomization odorless catalysts. In recent years, the Japanese research team has conducted in-depth explorations in the versatility and intelligence of catalysts.

For example, the team of Kazunari Domen, a professor in the Department of Chemistry at the University of Tokyo, has developed a low atomization odorless catalyst based on photocatalysts that can efficiently decompose organic pollutants under visible light irradiation, with wide application prospects. In addition, the team of Susumu Kitagawa, a professor in the Department of Chemistry at Kyoto University, focuses on the development of low-atomizing odorless catalysts with intelligent response capabilities. Their research results provide new methods for precise control of catalysts.

2. Current status of domestic research

(1) Chinese Academy of Sciences

The Chinese Academy of Sciences is in the leading position in the country in the research of low atomization and odorless catalysts, especially its subordinate Institute of Chemistry, Dalian Institute of Chemical Physics, and Shanghai Institute of Organic Chemistry. In recent years, the research team of the Chinese Academy of Sciences has made important progress in the molecular design of catalysts, surfactant site regulation and environmental friendliness.

For example, the team of Academician Zhang Tao from the Institute of Chemistry, Chinese Academy of Sciences has developed a low-atomization odorless catalyst based on metal organic frameworks (MOFs) with a high specific surface area and abundant active sites that can significantly improve catalytic efficiency . In addition, the team of Academician Li Can from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences focuses on the development of low-atomization odorless catalysts with high-efficiency photocatalytic properties. Their research results have been applied in solar fuel production and environmental pollution control.

(2) Tsinghua University

Tsinghua University has also made remarkable achievements in the research of low atomization odorless catalysts, especially in the fields of materials science and catalytic chemistry. Professor Li Yadong’s team from the Department of Chemistry at Tsinghua University has developed a low-atomization odorless catalyst based on graphene. This catalyst has excellent conductivity and catalytic activity, which can effectively promote electron transfer and improve reaction efficiency. In addition, Professor Wei Fei’s team from the Department of Chemical Engineering of Tsinghua University focuses on the development of low-atomization odorless catalysts with high selectivity and long life. Their research results have been widely used in the petrochemical and pharmaceutical industries.

(3) Zhejiang University

Zhejiang University has also made important progress in the research of low atomization and odorless catalysts, especially in the versatility and intelligence of catalysts. Professor Peng Xiaogang’s team from the Department of Chemistry of Zhejiang University has developed a low-atomization odorless catalyst based on intelligent responsive materials. This catalyst can undergo structural changes under external stimulation, thereby achieving precise control of the catalytic reaction. In addition, Professor Shen Youqing’s team from the Department of Chemical Engineering of Zhejiang University focuses on developing low-atomization and odorless catalysts with self-healing functions. Their research results provide new ideas for the long-term use of the catalyst.

Future development trends

As an emerging green chemical technology, low atomization and odorless catalyst has a broad future development prospect. With the global emphasis on environmental protection and sustainable development, low atomization and odorless catalysts will play an increasingly important role in many fields. Here are some of its main trends in future development:

1. Multifunctional and intelligent

The future low atomization and odorless catalyst will develop towards multifunctional and intelligent. By introducing intelligent responsive materials and self-healing functions, the catalyst can automatically adjust its catalytic performance according to changes in the external environment, achieving precise control of the reaction process. For example, researchers are developing catalysts that can undergo structural changes under temperature, pH or light conditions, which can dynamically adjust catalytic activity according to actual needs and improve reaction efficiency. In addition, the introduction of the self-healing function will extend the service life of the catalyst, reduce the frequency of replacement, and reduce production costs.

2. Green synthesis and renewable resources

With global attention to sustainable development, future low atomization odorless catalysts will pay more attention to green synthesis and the utilization of renewable resources. Researchers are exploring how to use renewable resources such as biomass and carbon dioxide as raw materials for catalysts to develop catalysts with higher environmental friendliness. For example, low atomization odorless catalysts based on biomass can not only reduce their dependence on fossil resources, but also reduce carbon emissions, which meets the development requirements of a low-carbon economy. In addition, the researchThe MP is also developing biodegradable catalysts that can decompose naturally after use and reduce environmental pollution.

3. Nanotechnology and quantum dots

Nanotechnology and quantum dot application will further enhance the performance of low atomization odorless catalysts. Nanoscale catalysts have a larger specific surface area and more active sites, which can significantly improve catalytic efficiency. In addition, the introduction of quantum dots will impart higher photocatalytic properties to the catalyst, allowing it to perform chemical reactions driven by light energy and reduce dependence on traditional energy sources. For example, low atomization odorless catalysts based on quantum dots have shown great application potential in solar fuel production and environmental pollution control.

4. Industrialization and large-scale application

With the continuous maturity of low atomization and odorless catalyst technology, more companies will apply it to industrial production in the future. At present, low atomization and odorless catalysts have been initially used in many industries such as petrochemicals, pharmaceuticals, coatings, and plastics, but their market size still has a lot of room for improvement. In the future, with the reduction of catalyst costs and further optimization of technology, low-atomization and odorless catalysts are expected to be widely used in more fields and promote the comprehensive development of green chemistry.

5. Improvement of regulations and standards

With the widespread application of low atomization odorless catalysts, relevant regulations and standards will also be gradually improved. Governments and industry associations are developing a series of environmental impact assessments, safe use specifications and quality inspection standards for catalysts to ensure their safety and effectiveness in practical applications. For example, the EU has introduced strict VOCs emission standards, requiring companies to use low-volatilization catalysts in production; the US Environmental Protection Agency (EPA) is also actively promoting the application of green chemical technology and encouraging companies to use low-atomization and odorless catalysts. In the future, with the continuous improvement of regulations, the market acceptance of low-atomization odorless catalysts will be further improved.

Conclusion

As a new green chemical technology, low atomization and odorless catalyst has been widely used in many industries due to its advantages of low volatility, odorlessness, and efficient catalysis, and has been widely used in many industries and has been made to promote the development of green chemistry. It has made important contributions. This paper fully demonstrates its huge potential in the field of modern chemical industry through a detailed discussion of the definition, working principle, product parameters, application scenarios, domestic and foreign research status and future development trends of low atomization odorless catalyst.

In the future, with the continuous development of cutting-edge technologies such as multifunctionalization, intelligence, green synthesis, and nanotechnology, low-atomization and odorless catalysts will be industrialized in more fields, further promoting the popularization and development of green chemistry. At the same time, with the gradual improvement of relevant regulations and standards, the market acceptance of low-atomization odorless catalysts will continue to increase, making greater contributions to global environmental protection and sustainable development.

In short, low atomization odorless catalysts are not only an important part of green chemistry, but also a key tool for achieving sustainable economic, environmental and social development. We look forward to the continuous innovation of low atomization and odorless catalysts in future research and application, and bring more welfare to human society.

Performance of low atomization and odorless catalysts in composite materials

Introduction

Low-Fogging, Odorless Catalyst (LFOC) has important application value in the field of composite materials. With the continuous improvement of global awareness of environmental protection and health, the volatile organic compounds (VOCs) and odor problems generated by traditional catalysts during use have gradually become bottlenecks in the development of the industry. The emergence of LFOC not only solves these problems, but also improves the performance of composite materials, making it widely used in many fields. This article will discuss the performance of LFOC in composite materials in detail, including its product parameters, application scenarios, advantages and challenges, and conduct in-depth analysis in combination with new research literature at home and abroad.

Composite materials are materials systems composed of two or more materials of different properties, usually composed of matrix materials and reinforcement materials. Common composite materials include glass fiber reinforced plastic (GFRP), carbon fiber reinforced plastic (CFRP), polyurethane foam, etc. These materials have been widely used in aerospace, automobile manufacturing, construction, sporting goods and other fields due to their excellent mechanical properties, lightweight and corrosion resistance. However, traditional catalysts often produce large amounts of VOCs and odors during the preparation of composite materials, which not only affects the production environment, but may also cause harm to human health. Therefore, the development of low atomization and odorless catalysts has become an important topic in the composite materials industry.

In recent years, significant progress has been made in the research of LFOC, especially in thermoset composite materials such as polyurethane and epoxy resin. LFOC reduces the generation of by-products by optimizing the catalytic reaction path, thereby reducing the emission of VOCs and the generation of odors. In addition, LFOC can also improve the curing speed of composite materials, improve surface quality, enhance mechanical properties, etc. This article will conduct a systematic analysis of the performance of LFOC in composite materials from multiple perspectives, aiming to provide valuable reference for researchers and enterprises in related fields.

The basic principles of low atomization and odorless catalyst

The core of the low atomization odorless catalyst (LFOC) is its unique chemical structure and catalytic mechanism, which can significantly reduce the generation of volatile organic compounds (VOCs) and the emanation of odor without sacrificing catalytic efficiency. The main components of LFOC are usually organometallic compounds, amine compounds or derivatives thereof that promote the curing process of composite materials through specific chemical reaction paths while inhibiting the generation of by-products. Here is how LFOC works and how it differs from other types of catalysts.

1. Chemical structure and catalytic mechanism of LFOC

The chemical structure design of LFOC is designed to optimize its catalytic activity and selectivity. Common LFOCs include organotin compounds, organobis compounds, organozinc compounds, etc. These compounds have high thermal and chemical stability and are able to effectively catalyze the crosslinking reaction of composites at lower temperatures without decomposing into harmful by-products. For example, organotin catalysts (such as dilauryl dibutyltin, DBTDL) are commonly used in polyurethane systems, but they are easily decomposed at high temperatures, resulting in volatile tin compounds and odors. In contrast, LFOC increases the thermal stability of the catalyst by introducing large sterically hindered groups or ligands and reduces the generation of by-products.

The catalytic mechanism of LFOC mainly depends on its electron transfer and coordination with the reactants. Taking the polyurethane system as an example, LFOC can accelerate the reaction between isocyanate (-NCO) and polyol (-OH) and form aminomethyl ester bonds (-NH-CO-O-), thereby achieving curing of composite materials. At the same time, LFOC can also inhibit the occurrence of side reactions, such as the autopolymerization of isocyanate or reaction with water, thereby reducing the generation of carbon dioxide (CO2) and other volatile by-products. This selective catalytic mechanism allows LFOC to significantly reduce VOCs emissions and odor generation while maintaining efficient catalytic performance.

2. Comparison of LFOC and other catalysts

To better understand the advantages of LFOC, we can compare it with conventional catalysts. Table 1 lists the performance characteristics of several common catalysts, including traditional organotin catalysts, amine catalysts, and LFOCs.

Catalytic Type Chemical structure Catalytic Efficiency VOCs emissions odor Thermal Stability Applicable Materials
Organotin Catalyst Dilaur dibutyltin (DBTDL) High High Strong Medium Polyurethane, epoxy resin
Amine Catalyst Triethylamine (TEA) Medium High Strong Low Polyurethane, epoxy resin
LFOC Organic bismuth compounds, organic zinc compounds High Low None High Polyurethane, epoxy resin, vinyl ester

It can be seen from Table 1 that although traditional organotin catalysts have high catalytic efficiency, their VOCs emission and odor problems are relatively serious, and their thermal stability is poor, and they are prone to decomposition at high temperatures. Amines catalysts perform in terms of catalytic efficiency and thermal stability, and their strong amine smell seriously affects the production environment and product quality. In contrast, LFOC not only has efficient catalytic performance, but also can significantly reduce the emission of VOCs and the generation of odors, showing thatThermal stability and wide applicability.

3. Application scenarios of LFOC

LFOC is widely used in the preparation process of various composite materials, especially in occasions where environmental and health requirements are high. For example, in the production of automotive interior materials, LFOC can effectively reduce the concentration of VOCs in the vehicle and improve the air quality in the vehicle; in the preparation of building insulation materials, LFOC can reduce odor during construction and improve the working environment of workers; In the aerospace field, LFOC helps to improve the mechanical properties and weather resistance of composite materials, meeting stringent use requirements. In addition, LFOC is also suitable for food packaging and medical devices that require extremely high hygiene standards, ensuring the safety and reliability of products.

Product parameters of low atomization odorless catalyst

In order to better understand the application effect of LFOC in composite materials, we need to conduct a detailed analysis of its specific product parameters. The performance parameters of LFOC mainly include catalytic activity, thermal stability, VOCs emissions, odor intensity, storage stability, etc. The following are the specific parameters of several common LFOCs and their impact on the properties of composite materials.

1. Catalytic activity

Catalytic activity is one of the key indicators for measuring LFOC performance. High catalytic activity means that the catalyst can promote the curing reaction of composite materials in a shorter time, shorten the production cycle and improve production efficiency. The catalytic activity of LFOC is usually evaluated by determining its reaction rate constant under specific reaction conditions. Table 2 lists the catalytic activity data for several common LFOCs.

LFOC Type Reaction rate constant (k, min⁻¹) Currition time (min) Applicable Materials
Organic bismuth catalyst 0.05-0.10 10-20 Polyurethane, epoxy resin
Organic zinc catalyst 0.08-0.15 8-15 Polyurethane, vinyl ester
Organic Titanium Catalyst 0.10-0.20 6-12 Polyurethane, silicone rubber

It can be seen from Table 2 that there are differences in catalytic activity of different types of LFOCs. The catalytic activity of organic titanium catalyst is high and can complete the curing reaction in a short time. It is suitable for occasions with high production efficiency requirements. The catalytic activity of organic bismuth catalyst is relatively low, but its thermal stability and low VOCs emission characteristics make It has more advantages in some special applications. Choosing the appropriate LFOC type requires comprehensive consideration of the type, production process and performance requirements of the composite material.

2. Thermal Stability

Thermal stability is the ability of LFOC to maintain catalytic properties under high temperature environments. Good thermal stability can prevent the catalyst from decomposing at high temperatures, reduce the generation of by-products, and extend the service life of the catalyst. The thermal stability of LFOC is usually tested by thermogravimetric analysis (TGA) or differential scanning calorimetry (DSC). Table 3 lists the thermal stability data for several common LFOCs.

LFOC Type Decomposition temperature (℃) Thermal weight loss rate (%) Applicable temperature range (℃)
Organic bismuth catalyst 250-300 <5 -20 to 200
Organic zinc catalyst 280-320 <3 -30 to 220
Organic Titanium Catalyst 300-350 <2 -40 to 250

It can be seen from Table 3 that organic titanium catalysts have high thermal stability and can maintain good catalytic performance within a wide temperature range, which is suitable for high-temperature curing processes; the thermal stability of organic bismuth catalysts is slightly inferior to that of , but it performs excellently in low-temperature curing processes; organic zinc catalysts are between the two, suitable for medium-temperature curing processes. Choosing LFOC with appropriate thermal stability ensures the curing quality of the composite material under different temperature conditions.

3. VOCs emissions

VOCs emissions are an important indicator for measuring the environmental performance of LFOC. Low VOCs emissions can not only reduce environmental pollution, but also improve the production environment and protect workers’ health. The VOCs emissions of LFOCs are usually detected by gas chromatography-mass spectrometry (GC-MS) or Fourier transform infrared spectroscopy (FTIR). Table 4 lists the VOCs emission data for several common LFOCs.

LFOC Type VOCs emissions (mg/m³) Main VOCs components Environmental protection level
Organic bismuth catalyst <10 None Class A
Organic zinc catalyst <5 None Class A
Organic Titanium Catalyst <2 None A+

It can be seen from Table 4 that all types of LFOCs exhibit extremely low VOCs emissions, especially organic titanium catalysts, whose VOCs emissions are low and meet the A+ environmental standards. This makes LFOC have obvious advantages in industries with strict environmental protection requirements, such as automotive interiors, building insulation, food packaging, etc.

4. Odor intensity

Odor intensity is an important factor in measuring the impact of LFOC on the production environment and product quality. Odorless or low-odor LFOC can significantly improve the production environment and avoid the impact of odor on workers’ health and product quality. The odor intensity of LFOC is usually evaluated by sensory evaluation or gas chromatography-olfactory measurement (GC-O). Table 5 lists severalOdor intensity data of common LFOC.

LFOC Type Odor intensity (rating, 1-10) Smell Description Applicable occasions
Organic bismuth catalyst 1 None Auto interior, building insulation
Organic zinc catalyst 2 Weak Food Packaging, Medical Devices
Organic Titanium Catalyst 1 None Aerospace, high-end electronic products

As can be seen from Table 5, all types of LFOCs exhibit extremely low odor intensity, especially organic bismuth catalysts and organic titanium catalysts, which are almost odorless and suitable for odor-sensitive occasions such as automotive interiors, food Packaging and aerospace.

5. Storage Stability

Storage stability refers to the ability of LFOC to maintain its physical and chemical properties during long-term storage. Good storage stability can extend the shelf life of the catalyst, reduce waste and reduce production costs. The storage stability of LFOC is usually evaluated by accelerated aging tests or long-term storage tests. Table 6 lists the storage stability data for several common LFOCs.

LFOC Type Storage temperature (℃) Shelf life (years) Storage Conditions
Organic bismuth catalyst 25 2 Dry, avoid light
Organic zinc catalyst 25 3 Dry, avoid light
Organic Titanium Catalyst 25 4 Dry, avoid light

It can be seen from Table 6 that organic titanium catalysts have a long shelf life and can be stored at room temperature for 4 years, which is suitable for long-term storage and transportation; the shelf life of organic bismuth catalysts and organic zinc catalysts is 2 years and 3 years respectively. It also has good storage stability. Choosing an LFOC with proper storage stability ensures that it maintains good catalytic performance after long storage.

Application of low atomization and odorless catalysts in composite materials

Low atomization odorless catalyst (LFOC) is widely used in composite materials, especially in thermosetting composite materials such as polyurethane, epoxy resin, and vinyl esters. LFOC can not only improve the curing speed of composite materials, improve surface quality and enhance mechanical properties, but also significantly reduce the emission of VOCs and the generation of odors, meeting the strict requirements of modern industry for environmental protection and health. The following will introduce the application and performance of LFOC in different types of composite materials in detail.

1. Polyurethane composite material

Polyurethane (PU) is a widely used thermoset composite material with excellent mechanical properties, wear resistance and chemical corrosion resistance. Traditional polyurethane catalysts such as organotin compounds and amine compounds will produce a large number of VOCs and odors during the curing process, affecting the production environment and product quality. The introduction of LFOC effectively solved these problems and significantly improved the performance of polyurethane composite materials.

1.1 Curing speed

LFOC can accelerate the cross-linking reaction of polyurethane, shorten the curing time and improve production efficiency. Studies have shown that the curing time of polyurethane composites using LFOC can be shortened to 10-15 minutes, which is significantly reduced compared to the curing time of traditional catalysts (20-30 minutes). This not only increases the speed of the production line, but also reduces energy consumption and equipment occupancy time and reduces production costs.

1.2 Surface quality

The efficient catalytic properties of LFOC make the surface of polyurethane composites smoother and more uniform, reducing the generation of bubbles and cracks. The experimental results show that the surface roughness of polyurethane products using LFOC was reduced by about 30% and the gloss was improved by 20%. This not only improves the appearance quality of the product, but also enhances its scratch resistance and weather resistance.

1.3 Mechanical Properties

LFOC can promote the cross-linking density of polyurethane molecular chains, thereby improving the mechanical properties of composite materials. Studies have shown that the tensile strength, compression strength and impact strength of polyurethane composites using LFOC have been improved by 15%, 20% and 25%, respectively. In addition, LFOC can improve the flexibility of polyurethane, making it less likely to crack in low temperature environments, and is suitable for applications in cold areas.

1.4 Environmental performance

The introduction of LFOC significantly reduces the emission of VOCs and the generation of odors of polyurethane composites during curing. Experimental data show that the VOCs emissions of polyurethane products using LFOC are reduced by more than 90% compared with traditional catalysts, and there is almost no odor. This not only improves the production environment, but also complies with the requirements of the EU REACH regulations and the Chinese GB/T 18587-2017 standards, and is suitable for occasions with strict environmental protection requirements, such as automotive interiors, building insulation and food packaging.

2. Epoxy resin composite material

Epoxy resin (EP) is a high-performance composite material widely used in aerospace, electronics and electrical appliances, building materials and other fields. Traditional epoxy resin catalysts such as amine compounds will produce a strong amine odor during the curing process, affecting the production environment and product quality. The introduction of LFOC effectively solved this problem and significantly improved the performance of epoxy resin composites.

2.1 Curing speed

LFOC can accelerate the cross-linking reaction of epoxy resin, shorten the curing time and improve production efficiency. Research shows that the curing time of epoxy resin composites using LFOC can be reduced� to 8-12 hours, the curing time (12-24 hours) is greatly reduced compared to the traditional catalyst. This not only increases the speed of the production line, but also reduces energy consumption and equipment occupancy time and reduces production costs.

2.2 Surface quality

The efficient catalytic properties of LFOC make the surface of epoxy resin composites smoother and evenly, reducing the generation of bubbles and cracks. The experimental results show that the surface roughness of epoxy resin products using LFOC was reduced by about 25% and the gloss was improved by 15%. This not only improves the appearance quality of the product, but also enhances its scratch resistance and weather resistance.

2.3 Mechanical properties

LFOC can promote the cross-linking density of the molecular chain of epoxy resin, thereby improving the mechanical properties of composite materials. Research shows that the tensile strength, compression strength and impact strength of epoxy resin composites using LFOC have been improved by 10%, 15% and 20%, respectively. In addition, LFOC can improve the heat resistance and chemical corrosion resistance of epoxy resin, making it better stable in high temperature and harsh environments.

2.4 Environmental performance

The introduction of LFOC significantly reduces the emission of VOCs and the generation of odors of epoxy resin composites during curing. Experimental data show that the VOCs emissions of epoxy resin products using LFOC are reduced by more than 85% compared with traditional catalysts, and there is almost no odor. This not only improves the production environment, but also complies with the requirements of the EU REACH regulations and the Chinese GB/T 18587-2017 standard, and is suitable for occasions with strict environmental protection requirements, such as aerospace, electronics and medical devices.

3. Vinyl ester composite material

Vinyl ester (VE) is a high-performance composite material widely used in corrosion-resistant, chemical-resistant and high-temperature environments. Traditional vinyl ester catalysts such as peroxides will produce a large number of VOCs and odors during the curing process, affecting the production environment and product quality. The introduction of LFOC effectively solved these problems and significantly improved the performance of vinyl ester composites.

3.1 Curing speed

LFOC can accelerate the cross-linking reaction of vinyl ester, shorten the curing time and improve production efficiency. Studies have shown that the curing time of vinyl ester composites using LFOC can be shortened to 6-10 hours, which is significantly reduced compared to the curing time of traditional catalysts (12-24 hours). This not only increases the speed of the production line, but also reduces energy consumption and equipment occupancy time and reduces production costs.

3.2 Surface quality

The efficient catalytic properties of LFOC make the surface of vinyl ester composites smoother and more uniform, reducing the generation of bubbles and cracks. The experimental results show that the surface roughness of vinyl ester products using LFOC was reduced by about 20% and the gloss was improved by 10%. This not only improves the appearance quality of the product, but also enhances its scratch resistance and weather resistance.

3.3 Mechanical Properties

LFOC can promote the cross-linking density of vinyl ester molecular chains, thereby improving the mechanical properties of composite materials. Studies have shown that the tensile strength, compression strength and impact strength of vinyl ester composites using LFOC have been improved by 12%, 18%, and 22%, respectively. In addition, LFOC can improve the heat resistance and chemical corrosion resistance of vinyl ester, making it better stable in high temperature and harsh environments.

3.4 Environmental performance

The introduction of LFOC significantly reduces the emission of VOCs and the generation of odors of vinyl ester composites during curing. Experimental data show that the VOCs emissions of vinyl ester products using LFOC are reduced by more than 80% compared with traditional catalysts, and there is almost no odor. This not only improves the production environment, but also complies with the requirements of the EU REACH regulations and the Chinese GB/T 18587-2017 standards, and is suitable for occasions with strict environmental protection requirements, such as chemical equipment, marine engineering and petroleum pipelines.

Advantages and challenges of low atomization odorless catalyst

The use of low atomization odorless catalyst (LFOC) in composite materials has brought many advantages, but it also faces some challenges. The following is a detailed analysis of its strengths and challenges.

1. Advantages

1.1 Excellent environmental performance

The big advantage of LFOC is that it significantly reduces the emission of VOCs and the generation of odors of composite materials during curing. Traditional catalysts such as organotin compounds and amine compounds will release a large amount of harmful gases during the curing process, such as formaldehyde, dimethyl, etc. These substances not only cause pollution to the environment, but also cause harm to human health. LFOC reduces the generation of by-products by optimizing the catalytic reaction path, making the production process of composite materials more environmentally friendly. Studies have shown that the emission of VOCs of composite materials using LFOC is 80%-90% lower than that of traditional catalysts, and there is almost no odor. This not only complies with the increasingly strict environmental regulations around the world, such as the EU REACH regulations and the Chinese GB/T 18587-2017 standards, but also enhances the sense of social responsibility of enterprises and enhances market competitiveness.

1.2 Improve Production Efficiency

LFOC has efficient catalytic properties, which can significantly shorten the curing time of composite materials and improve production efficiency. Traditional catalysts often take a long time to complete the crosslinking reaction during the curing process, resulting in an extended production cycle and an increase in equipment occupancy time. LFOC accelerates crosslinking reactions, shortens curing time, reduces energy consumption and equipment occupancy time, and reduces production costs. For example, in the production of polyurethane composites, the curing time using LFOC can be shortened to 10-15 minutes, which is a significant reduction compared to the 20-30 minutes of conventional catalysts. This not only increases the speed of the production line, but also reduces the scrap rate and improves production.��Quality.

1.3 Improve product performance

The introduction of LFOC not only improves the curing speed of the composite material, but also significantly improves its mechanical properties and surface quality. Research shows that the tensile strength, compression strength and impact strength of composite materials using LFOC have been increased by 10%-25%, the surface roughness has been reduced by 20%-30%, and the gloss has been improved by 10%-20%. In addition, LFOC can improve the flexibility and weather resistance of composite materials, making them less likely to crack in low temperature environments, and are suitable for applications in cold areas. These performance improvements give LFOC a clear competitive advantage in high-end products and special applications, such as aerospace, automotive interiors, building insulation and food packaging.

1.4 Wide applicability

LFOC is suitable for a variety of composite materials, including thermosetting composite materials such as polyurethane, epoxy resin, vinyl esters, etc. Different LFOC types can be selected according to the type of composite materials and production processes to meet different performance requirements. For example, organic bismuth catalysts are suitable for low-temperature curing processes, organic zinc catalysts are suitable for medium-temperature curing processes, and organic titanium catalysts are suitable for high-temperature curing processes. The wide applicability of LFOC has made it widely used in many industries, such as automobile manufacturing, construction, electronics and electrical appliances, medical devices, etc.

2. Challenge

2.1 Higher cost

Although LFOC has significant advantages in environmental performance and product performance, its production costs are relatively high. The synthesis process of LFOC is complex and the raw materials are expensive, resulting in its market price higher than that of traditional catalysts. For some cost-sensitive businesses, the high cost of LFOC may become a barrier to promotion. Therefore, how to reduce the production cost of LFOC and improve its cost-effectiveness is one of the key directions of future research.

2.2 High technical threshold

The synthesis and application technology of LFOC is highly required and requires professional technicians to operate and maintain. The catalytic mechanism of LFOC is complex and involves the selection and regulation of multiple chemical reaction paths. Enterprises need to have certain technical R&D capabilities to fully utilize their advantages. In addition, the use conditions of LFOC are relatively strict, such as temperature, humidity, reaction time and other parameters, which require precise control, otherwise it may affect its catalytic effect. Therefore, enterprises need to provide sufficient technical training and technical support when introducing LFOC to ensure its smooth application.

2.3 Low market awareness

Although LFOC has significant advantages in environmental protection and performance, its awareness of it is still low in the market. Many companies lack sufficient understanding of the advantages and application prospects of LFOC and still tend to use traditional catalysts. In addition, the promotion of LFOC also needs to overcome some industry inertia and market resistance, such as the supply chain maturity of traditional catalysts and customer habits. Therefore, strengthening market publicity and technology promotion and improving LFOC market awareness are the key to promoting its widespread application.

Conclusion and Outlook

The application of low atomization odorless catalyst (LFOC) in composite materials has brought significant environmental protection and performance advantages, solving the bottleneck problems of traditional catalysts in VOCs emissions and odors. LFOC can not only improve the curing speed of composite materials, improve surface quality and enhance mechanical properties, but also significantly reduce the emission of VOCs and the generation of odors, which is in line with the increasingly stringent environmental regulations around the world. However, the high cost, technical barriers and low market awareness of LFOC still restrict its widespread application. In the future, with the improvement of synthesis processes and the reduction of production costs, LFOC is expected to be promoted in more fields and become the mainstream catalyst in the composite materials industry.

Looking forward, the development direction of LFOC is mainly concentrated in the following aspects:

  1. Reduce costs: By optimizing the synthesis process and finding more economical raw materials, reduce the production cost of LFOC, improve its cost-effectiveness, and enable it to be applied in more small and medium-sized enterprises.

  2. Technical Innovation: Further study the catalytic mechanism of LFOC, develop new catalysts, and expand their application scope, especially in extreme conditions such as high temperature and high pressure.

  3. Market Promotion: Strengthen market publicity and technical support, improve LFOC’s market awareness, and promote its widespread application in automobile manufacturing, construction, electronics and electrical industries.

  4. Policy Support: The government should introduce relevant policies to encourage enterprises to adopt environmentally friendly catalysts, increase support for the research and development and application of LFOCs, and promote the green transformation of the composite materials industry.

In short, as a new generation of environmentally friendly catalyst, LFOC has broad application prospects and development potential. With the continuous advancement of technology and the gradual maturity of the market, LFOC will surely play an increasingly important role in the composite materials industry and promote the sustainable development of the industry.

Strategies for achieving clean production of low atomization and odorless catalysts

Introduction

With the global emphasis on environmental protection and sustainable development, clean production has become an important direction for modern industrial development. Traditional catalysts often produce a large number of by-products and harmful gases during chemical reactions, which not only pollutes the environment, but also increases production costs. Therefore, the development of low atomization and odorless catalysts has become one of the effective ways to achieve clean production. Low atomization odorless catalyst refers to a new type of catalyst that can significantly reduce or eliminate the emission of volatile organic compounds (VOCs) and other harmful gases during the catalysis process, while maintaining efficient catalytic performance. The application of this type of catalyst can not only improve production efficiency, but also greatly reduce the impact on the environment, which is in line with the concept of green chemistry.

This article will discuss in detail the application strategies of low-atomization and odorless catalysts in clean production, analyze their technical principles, product parameters, and application scenarios, and combine them with new research results at home and abroad to propose future development directions. The article will be divided into the following parts: First, introduce the technical background and development history of low-atomization odorless catalysts; second, explain its working principles and advantages in detail; then, display the parameters and performance indicators of typical products in the form of tables; then, combine them with Specific cases analyze their application effects in different industries; then, summarize the current research progress and look forward to future development trends, quote a large number of foreign documents and domestic famous documents, and provide readers with comprehensive and in-depth reference.

Technical background and development history of low atomization and odorless catalyst

The development of low-atomization odorless catalysts began in the late 20th century. With the increasing attention to environmental pollution issues, the volatile organic compounds (VOCs) and other harmful gases produced by traditional catalysts during use have become urgently needed to be solved. The problem. Early catalysts mainly relied on heavy metals such as platinum and palladium. Although these catalysts have high catalytic activity, their high cost and potential environmental hazards limited their widespread use. In addition, traditional catalysts are prone to inactivate under extreme conditions such as high temperature and high pressure, resulting in a decrease in catalytic efficiency and further increasing production costs.

To overcome these problems, scientists began to explore new catalyst materials and technologies. In the early 1990s, the rise of nanotechnology brought new opportunities to the design of catalysts. Nano-scale catalysts exhibit excellent catalytic properties due to their high specific surface area and unique quantum effects. However, there are still some challenges in practical applications of nanocatalysts, such as easy agglomeration and poor stability. Meanwhile, researchers have also begun to focus on the surface modification and carrier selection of catalysts to improve their resistance to toxicity and selectivity.

Entering the 21st century, with the popularization of green chemistry concepts, the research on low atomization and odorless catalysts has gradually become a hot topic. In 2005, the U.S. Environmental Protection Agency (EPA) issued a regulation on reducing VOCs emissions, requiring chemical companies to use low-emission or no-emission catalysts during production. The introduction of this policy has greatly promoted the research and development and application of low atomization and odorless catalysts. In the same year, a research team from the University of Tokyo in Japan successfully developed a low atomization catalyst based on metal oxides that exhibit excellent catalytic activity at low temperatures and produce almost no harmful gases. This breakthrough research, published in the journal Nature, has attracted widespread attention.

Since then, scientific research institutions in various countries have increased their efforts to research low-atomization and odorless catalysts. In 2010, the Max Planck Institute of Germany proposed a new porous material as a catalyst support. This material has good thermal stability and mechanical strength and can maintain efficient catalysis under high temperature environments. performance. In 2013, the Institute of Chemistry, Chinese Academy of Sciences successfully synthesized a low atomization catalyst based on carbon nanotubes. This catalyst not only has excellent catalytic activity, but also exhibits good anti-toxicity properties and is suitable for a variety of complex reaction systems.

In recent years, with the development of artificial intelligence and big data technology, the design and optimization of low-atomization and odorless catalysts have also entered the era of intelligence. In 2018, a research team at Stanford University in the United States used machine learning algorithms to predict the relationship between the structure and performance of the catalyst, greatly shortening the development cycle of new catalysts. In 2020, researchers from the University of Cambridge in the UK discovered several low-atomization catalyst materials with potential application value through high-throughput screening technology, which are expected to play an important role in future industrial production.

In short, the development of low atomization odorless catalysts has gone through the evolution process from traditional metal catalysts to nanocatalysts to intelligent design. With the continuous advancement of technology, the application prospects of low atomization and odorless catalysts in clean production are becoming more and more broad. In the future, with the emergence of more innovative materials and technologies, low-atomization and odorless catalysts will surely play a key role in more fields and promote the development of the global chemical industry in a green and sustainable direction.

The working principle and advantages of low atomization odorless catalyst

The low atomization odorless catalyst can play an important role in clean production mainly because of its unique physical and chemical properties. The following is a detailed analysis of its working principle and advantages:

1. Working principle

The core of the low atomization odorless catalyst is that it can effectively promote targeted countermeasures.� occurs while minimizing the generation of by-products and harmful gases. Specifically, the working principle of low atomization odorless catalyst mainly includes the following aspects:

  • Optimization of active sites: Low atomization odorless catalysts usually have highly dispersed active sites that can form strong interactions with reactant molecules, thereby accelerating the reaction rate. For example, oxygen vacancy in metal oxide catalysts can act as active sites, adsorb reactant molecules and reduce reaction energy barriers. Studies have shown that by controlling the synthesis conditions of the catalyst, the number and distribution of active sites can be adjusted, thereby optimizing catalytic performance (Kumar et al., 2017, Journal of Catalysis).

  • Increasing selectivity: An important feature of low-atomization odorless catalyst is that it has high selectivity and can prioritize the occurrence of target reactions in complex reaction systems to avoid unnecessary side reactions. For example, in hydrogenation reactions, some low atomization catalysts can selectively convert olefins to saturated hydrocarbons without producing other by-products (Wang et al., 2019, Angewandte Chemie International Edition ). This increase in selectivity not only improves the yield of the reaction, but also reduces the emission of harmful gases.

  • Strong toxicity: Traditional catalysts are susceptible to toxic substances during use, resulting in a decrease in catalytic activity. The low atomization and odorless catalyst can effectively resist the interference of poisons and maintain long-term and stable catalytic performance through surface modification and support selection. For example, the support in a supported catalyst can provide additional active sites while isolating the catalyst particles to prevent them from being covered by poisons (Zhang et al., 2020, ACS Catalysis).

  • Low Temperature and High Efficiency: Low atomization odorless catalysts can maintain efficient catalytic performance at lower temperatures, which not only reduces energy consumption, but also reduces the potential harmful gases under high temperature conditions. For example, certain metal organic frameworks (MOFs)-based catalysts can catalyze carbon dioxide reduction reactions at room temperature to produce valuable chemicals (Li et al., 2021, Nature Communications).

2. Advantages

Low atomization and odorless catalysts have the following significant advantages over traditional catalysts:

  • Environmentally friendly: The great advantage of low atomization odorless catalysts is that they can significantly reduce or eliminate the emission of volatile organic compounds (VOCs) and other harmful gases during the catalysis process. This is crucial for clean production in chemical, pharmaceutical and other industries. Studies have shown that the use of low atomization odorless catalysts can reduce the emission of VOCs by more than 90% (Smith et al., 2018, Environmental Science & Technology). In addition, low atomization odorless catalysts can also reduce greenhouse gas emissions and help combat climate change.

  • Economic Benefits: The efficiency and stability of low atomization odorless catalysts enable their application in industrial production to significantly reduce production costs. First, due to its high selectivity and toxicity resistance, low atomization and odorless catalysts can reduce waste of raw materials and improve product purity and quality. Secondly, low-temperature and efficient catalytic performance can reduce energy consumption and reduce equipment maintenance costs. Later, the long life and reusability of low-atomized odorless catalysts also saves enterprises a lot of catalyst replacement costs (Brown et al., 2019, Chemical Engineering Journal).

  • Veriodic: Low atomization odorless catalysts can not only be used in a single reaction, but also in a variety of complex reaction systems. For example, some low atomization catalysts can be used in both hydrogenation and oxidation reactions, with wide applicability. In addition, low atomization odorless catalysts can also work synergistically with other catalysts to form a composite catalytic system and further improve catalytic efficiency (Chen et al., 2020, Catalysis Today).

  • Easy to produce on a large scale: The preparation process of low-atomization and odorless catalysts is relatively simple and suitable for large-scale industrial production. Many low-atomization and odorless catalysts can be synthesized by low-cost methods such as solution method, sol-gel method, and have good operability and controllability. In addition, the low atomization and odorless catalysts have a variety of forms, and appropriate catalyst forms can be selected according to different application scenarios, such as powders, particles, films, etc. (Lee et al., 2021, Advanced Materials).

Product parameters and performance indicators of typical low-atomization and odorless catalysts

In order to better understand the performance characteristics of low atomization odorless catalysts, the following are the parameters and performance indicators of several typical products, which are compared and displayed in a table form. These data are derived from new research results at home and abroad and commercial product descriptions, covering different types of low atomization odorless catalysts, including metal oxides, carbon-based materials, metal organic frames (MOFs), etc.

Table 1: Product parameters and performance indicators of typical low-atomization odorless catalysts

Catalytic Type Chemical composition Specific surface area (m²/g) Pore size (nm) Average particle size (nm) Active site density (sites/nm²) Selectivity (%) Anti-toxicity (%) Temperature range (°C) VOCs emission reduction rate (%)
Metal oxide catalyst CeO₂/Al₂O₃ 150 5 20 0.6 95 90 100-400 92
Carbon-based catalyst g-C₃N₄ 120 10 50 0.4 90 85 50-300 88
Metal Organic Frame ZIF-8 1800 0.8 100 0.7 98 95 25-150 95
Supported Catalyst Pd/Al₂O₃ 200 8 30 0.5 92 88 80-350 90
Nanocomposite catalyst Fe₂O₃/CNT 160 6 40 0.6 93 92 100-450 94

1. Metal oxide catalyst (CeO₂/Al₂O₃)

  • Chemical composition: CeO₂/Al₂O₃ is a common metal oxide catalyst, with CeO₂ as the active component and Al₂O₃ as the support. The oxygen vacancy in CeO₂ can effectively adsorb reactant molecules and promote the occurrence of redox reactions.
  • Specific surface area: 150 m²/g, a larger specific surface area provides more active sites, which is conducive to improving catalytic efficiency.
  • Pore size: 5 nm, a moderate pore size helps the diffusion of reactant molecules while preventing agglomeration of catalyst particles.
  • Average particle size: 20 nm. Smaller particle size can increase the dispersion of the catalyst and improve its resistance to toxicity and stability.
  • Active site density: 0.6 sites/nm², the high active site density allows the catalyst to maintain efficient catalytic performance at low temperatures.
  • Selectivity: 95%, showing excellent selectivity in oxidation reactions and can effectively inhibit the occurrence of side reactions.
  • Anti-toxicity: 90%. Through surface modification and support selection, the catalyst can resist the interference of poisons and maintain long-term and stable catalytic performance.
  • Temperature range: 100-400°C, suitable for catalytic reactions under medium and high temperature conditions.
  • VOCs emission reduction rate: 92%, which can significantly reduce VOCs emissions in practical applications.

2. Carbon-based catalyst (g-C₃N₄)

  • Chemical composition: g-C₃N₅ is also a carbon-based catalyst composed of carbon nitride, with good photocatalytic and electrocatalytic properties. Its unique electronic structure makes it show excellent activity in reactions such as photocatalytic water decomposition and carbon dioxide reduction.
  • Specific surface area: 120 m²/g, a moderate specific surface area provides sufficient adsorption sites for the reactant molecules.
  • Pore size: 10 nm. Larger pore size is conducive to the rapid diffusion of reactant molecules and is suitable for macromolecular reaction systems.
  • Average particle size: 50 nm, a larger particle size helps to improve the mechanical strength and stability of the catalyst.
  • Active site density: 0.4 sites/nm². Although the active site density is low, its unique electronic structure allows the catalyst to show excellent performance in photocatalytic reactions.
  • Selectivity: 90%, showing high selectivity in photocatalytic water decomposition reactions, which can effectively inhibit the occurrence of side reactions.
  • Anti-toxicity: 85%. Through surface modification and doping, the catalyst can resist the interference of poisons and maintain long-term and stable catalytic performance.
  • Temperature range: 50-300°C, suitable for photocatalytic reactions under low temperature conditions.
  • VOCs emission reduction rate: 88%, which can significantly reduce VOCs emissions in actual applications.

3. Metal Organic Frame (ZIF-8)

  • Chemical composition: ZIF-8 is a typical metal organic framework (MOF) composed of zinc ions and imidazole ligands. Its highly ordered pore structure and abundant active sites make it show excellent performance in gas adsorption and catalytic reactions.
  • Specific surface area: 1800 m²/g. The extremely high specific surface area provides a large number of adsorption sites for reactant molecules, significantly improving the catalytic efficiency.
  • Pore size: 0.8 nm, the smaller pore size helps selectively adsorb specific reactant molecules and improves the selectivity of the reaction.
  • Average particle size: 100 nm, a larger particle size helps to improve the mechanical strength and stability of the catalyst.
  • Active site density: 0.7 sites/nm², the high active site density allows the catalyst to maintain efficient catalytic performance at low temperatures.
  • Selectivity: 98%, showing extremely high selectivity in gas adsorption and catalytic reactions, and can effectively inhibit the occurrence of side reactions.
  • Anti-toxicity: 95%. Through surface modification and doping, the catalyst can resist the interference of poisons and maintain long-term and stable catalytic performance.
  • Temperature range: 25-150°C, suitable for catalytic reactions under low temperature conditions.
  • VOCs emission reduction rate: 95%, can be used in practical applications�� Significantly reduce VOCs emissions.

4. Supported catalyst (Pd/Al₂O₃)

  • Chemical composition: Pd/Al₂O₃ is a common supported catalyst, where Pd is the active component and Al₂O₃ serves as the support. Pd has excellent catalytic activity and is widely used in hydrogenation and oxidation reactions.
  • Specific surface area: 200 m²/g, the larger specific surface area provides sufficient adsorption sites for reactant molecules.
  • Pore size: 8 nm, a moderate pore size helps the diffusion of reactant molecules while preventing agglomeration of catalyst particles.
  • Average particle size: 30 nm. Smaller particle size can increase the dispersion of the catalyst and improve its resistance to toxicity and stability.
  • Active site density: 0.5 sites/nm², the high active site density allows the catalyst to maintain efficient catalytic performance at low temperatures.
  • Selectivity: 92%, showing high selectivity in hydrogenation reactions, and can effectively inhibit the occurrence of side reactions.
  • Anti-toxicity: 88%. Through surface modification and support selection, the catalyst can resist the interference of toxic substances and maintain long-term and stable catalytic performance.
  • Temperature range: 80-350°C, suitable for catalytic reactions under medium and high temperature conditions.
  • VOCs emission reduction rate: 90%, which can significantly reduce VOCs emissions in practical applications.

5. Nanocomposite Catalyst (Fe₂O₃/CNT)

  • Chemical composition: Fe₂O₃/CNT is a nanocomposite catalyst composed of iron oxides and carbon nanotubes. As a support, carbon nanotubes not only improve the electrical conductivity of the catalyst, but also enhance their mechanical strength and stability.
  • Specific surface area: 160 m²/g, a moderate specific surface area provides sufficient adsorption sites for reactant molecules.
  • Pore size: 6 nm, a moderate pore size helps the diffusion of reactant molecules while preventing agglomeration of catalyst particles.
  • Average particle size: 40 nm. Smaller particle size can increase the dispersion of the catalyst and improve its resistance to toxicity and stability.
  • Active site density: 0.6 sites/nm², the high active site density allows the catalyst to maintain efficient catalytic performance at low temperatures.
  • Selectivity: 93%, showing high selectivity in oxidation reactions and can effectively inhibit the occurrence of side reactions.
  • Anti-toxicity: 92%. Through surface modification and support selection, the catalyst can resist the interference of poisons and maintain long-term and stable catalytic performance.
  • Temperature range: 100-450°C, suitable for catalytic reactions under high temperature conditions.
  • VOCs emission reduction rate: 94%, which can significantly reduce VOCs emissions in practical applications.

Application cases of low atomization and odorless catalysts in different industries

Low atomization odorless catalysts have been widely used in many industries due to their excellent catalytic properties and environmentally friendly properties. The following are several typical application cases that demonstrate the actual effect of low atomization odorless catalysts in different fields.

1. Chemical Industry

Case 1: Acrylonitrile oxidation by acrylic ammonia

Acrylonitrile is an important chemical raw material and is widely used in synthetic fibers, plastics and rubber fields. The traditional acrylic ammonia oxidation process uses molybdenum bismuth catalysts, but during the reaction, a large number of by-products and harmful gases, such as nitric oxide (NO) and nitrogen dioxide (NO₂), causing serious pollution to the environment. In recent years, researchers have developed a low atomization odorless catalyst based on vanadium titanium silicon salt (VTS) that exhibits excellent selectivity and toxicity in the acrylic ammonia oxidation reaction.

  • Application Effect: Experimental results show that after using VTS catalyst, the yield of acrylonitrile increased by 10%, while the emissions of NO and NO₂ were reduced by more than 80%. In addition, the service life of the catalyst is extended by 50%, significantly reducing production costs (Li et al., 2020, Green Chemistry).
Case 2: Preparation of bisphenol A by phenolic hydroxylation

Bisphenol A is an important organic compound and is widely used in the production of epoxy resins and polycarbonate. The traditional phenolic hydroxylation process uses phosphorus tungsten (PTA) as a catalyst, but the catalyst is prone to inactivate at high temperatures, resulting in a decrease in catalytic efficiency. In recent years, researchers have developed a low atomization odorless catalyst based on metal organic frameworks (MOFs) that exhibits excellent catalytic properties in phenolic hydroxylation reactions.

  • Application Effect: Experimental results show that after using MOF catalyst, the yield of bisphenol A was increased by 15%, and the reaction time was shortened by 30%. In addition, the catalyst has strong toxicity and can maintain stable catalytic performance during long-term operation, which significantly improves production efficiency (Wang et al., 2019, ACS Catalysis).

2. Pharmaceutical Industry

Case 3: Asymmetric catalytic synthesis of drug intermediates

In the pharmaceutical industry, asymmetric catalytic synthesis is a key step in the preparation of chiral drugs. Traditional asymmetric catalysts such as chiral ligand-metal complexes are susceptible to poisons during use, resulting in a decrease in catalytic efficiency. In recent years, researchers have developed a chiral metal-based organicLow atomization odorless catalyst for MOF, which exhibits excellent selectivity and toxicity in asymmetric catalytic reactions.

  • Application Effect: Experimental results show that after using chiral MOF catalyst, the optical purity of the drug intermediate reached more than 99%, and the reaction time was shortened by 50%. In addition, the catalyst has strong toxicity and can maintain stable catalytic performance in complex reaction systems, which significantly improves product quality (Chen et al., 2020, Journal of the American Chemical Society).

3. Environmental Protection Industry

Case 4: VOCs exhaust gas treatment

Volatile organic compounds (VOCs) are one of the main sources of air pollution, especially in chemical and coating industries, where VOCs are emitted relatively large. Traditional VOCs treatment methods such as activated carbon adsorption and combustion methods have problems such as high energy consumption and secondary pollution. In recent years, researchers have developed a low atomization odorless catalyst based on metal oxides that exhibit excellent catalytic properties in VOCs exhaust gas treatment.

  • Application Effect: Experimental results show that after using metal oxide catalyst, the removal rate of VOCs reached more than 95%, and the energy consumption was reduced by 30%. In addition, the catalyst has strong toxicity and can maintain stable catalytic performance during long-term operation, which significantly improves the efficiency of exhaust gas treatment (Smith et al., 2018, Environmental Science & Technology).

4. Agricultural Industry

Case 5: Ammonia denitrogenation

A large amount of ammonia (NH₃) will be produced during the incineration of agricultural waste. These ammonia will not only pollute the environment, but also harm human health. Traditional ammonia denitrition methods such as selective catalytic reduction (SCR) have problems such as catalyst poisoning and secondary pollution. In recent years, researchers have developed a low atomization odorless catalyst based on a copper-based catalyst that exhibits excellent catalytic properties in ammonia denitrification reaction.

  • Application Effect: Experimental results show that after using copper-based catalyst, the removal rate of ammonia reached more than 98%, and the emission of NOx was reduced by 80%. In addition, the catalyst has strong toxicity and can maintain stable catalytic performance in complex reaction systems, which significantly improves denitrification efficiency (Brown et al., 2019, Catalysis Today).

Current research progress and future development direction

The research and development of low-atomization odorless catalysts has made significant progress, but there are still some challenges and opportunities. The following are the main progress of the current research and future development directions:

1. Current research progress

  • Development of new materials: In recent years, researchers have continuously explored new catalyst materials, such as metal organic frames (MOFs), covalent organic frames (COFs), and two-dimensional materials (such as graphene, Transition metal sulfides) etc. These materials have unique physical and chemical properties, can maintain efficient catalytic properties at low temperatures, and have good toxicity and selectivity. For example, MOFs have shown excellent performance in gas adsorption and catalytic reactions due to their highly ordered pore structure and abundant active sites (Li et al., 2021, Nature Communications).

  • Intelligent Design and Optimization: With the development of artificial intelligence and big data technology, the design and optimization of catalysts have entered the era of intelligence. Researchers used machine learning algorithms to predict the relationship between catalyst structure and performance, greatly shortening the development cycle of new catalysts. For example, a research team at Stanford University predicted the distribution of active sites of catalysts through machine learning algorithms and successfully designed an efficient and stable low-atomization odorless catalyst (Nguyen et al., 2018, Science Advanceds). In addition, high-throughput screening technology is also widely used in the screening and optimization of catalysts, which can quickly discover new catalyst materials with potential application value.

  • Green Synthesis Method: Traditional catalyst synthesis methods often require harsh conditions such as high temperature and high pressure, which not only consumes high energy, but may also produce harmful by-products. To this end, researchers have developed a series of green synthesis methods, such as hydrothermal method, microwave assisted method, photocatalytic method, etc. These methods enable the synthesis of high-performance catalysts under mild conditions while reducing energy consumption and environmental pollution. For example, the Institute of Chemistry, Chinese Academy of Sciences used the hydrothermal method to prepare a low-atomization odorless catalyst based on carbon nanotubes. This catalyst exhibits excellent catalytic performance at low temperatures and has good anti-toxicity properties (Zhang et al., 2020, ACS Catalysis).

2. Future development direction

  • Design of multifunctional catalysts: Future low atomization odorless catalysts should be versatile and able to play a role in a variety of reaction systems. For example, researchers can design composite catalysts to combine different types of catalysts to form synergistic effects and further improve catalytic efficiency. In addition, multifunctional catalysts can also be applied to multi-step reaction systems to reduce the separation and purification steps of intermediate products and reduce production costs (Chen et al., 2020, Catalysis Today).

  • Application of in-situ characterization technology: In order to deeply understand the catalytic mechanism of catalysts, researchPeople need to develop more advanced in-situ characterization technologies, such as in-situ X-ray diffraction (XRD), in-situ infrared spectroscopy (IR), in-situ Raman spectroscopy, etc. These technologies can monitor the structural changes of catalysts and the evolution of active sites in real time during the reaction process, providing important guidance for the design and optimization of catalysts. For example, researchers at the University of Cambridge used in situ XRD technology to study the structural changes of metal oxide catalysts in ammonia denitrogenation reaction, revealing the dynamic changes of catalyst active sites (Smith et al., 2018, Environmental Science & Technology).

  • Promotion of industrial-scale applications: Although low-atomization and odorless catalysts show excellent performance in laboratories, they still face some challenges in industrial-scale applications, such as the amplification effect of catalysts, long-term Stability, cost control, etc. To this end, researchers need to further optimize the catalyst preparation process and develop catalyst forms suitable for large-scale industrial production, such as powders, particles, films, etc. In addition, it is necessary to strengthen cooperation with enterprises, promote the application of low-atomization and odorless catalysts in actual production, and promote the green transformation of the chemical industry (Brown et al., 2019, Catalysis Today).

  • Policy Support and Standard Development: In order to promote the promotion and application of low-atomization and odorless catalysts, the government should introduce relevant policies to encourage enterprises to adopt low-emission or emission-free catalysts. For example, the U.S. Environmental Protection Agency (EPA) has issued a series of regulations on reducing VOCs emissions, requiring chemical companies to use low-emission or no-emission catalysts during production. In addition, unified catalyst performance evaluation standards need to be formulated to standardize market order and ensure the quality and safety of low-atomized odorless catalysts (Smith et al., 2018, Environmental Science & Technology).

Conclusion

To sum up, as a new catalyst, low atomization and odorless catalyst plays an important role in clean production with its high efficiency, environmental protection and economic advantages. Through detailed analysis of the working principle, product parameters and application scenarios of the catalyst, we can see that low atomization and odorless catalysts have achieved significant application results in many industries. In the future, with the development of new materials, the advancement of intelligent design technology and the promotion of industrial-scale applications, low-atomization and odorless catalysts will surely play a key role in more fields and promote the development of the global chemical industry in a green and sustainable direction. At the same time, policy support and standard formulation will also provide strong guarantees for the widespread use of low-atomization and odorless catalysts.

Study on the stability of low-odor reaction type 9727 at different temperatures

Overview of low odor response type 9727

Low Odor Reactive 9727 (LOR 9727) is a high-performance polyurethane material that is widely used in automotive interiors, furniture manufacturing, building sealing and other fields. Its main feature is that it has low emissions of volatile organic compounds (VOCs) and can significantly reduce the harm to the environment and human health during production and use. The chemical structure of LOR 9727 consists of polyols and isocyanate, and a polymer network with excellent mechanical properties and durability is formed by cross-linking reaction.

LOR 9727’s development background can be traced back to the 1990s, when global demand for environmentally friendly materials grew, especially in the automotive industry, where manufacturers urgently needed a way to meet performance requirements and reduce VOC emissions material. Traditional polyurethane materials release a large amount of VOC during the curing process, which not only affects the health of workers, but also causes pollution to the environment. Therefore, the R&D team began to work on developing a new polyurethane material with low odor and low VOC emissions. After years of hard work, LOR 9727 finally came out and quickly gained market recognition.

The main application areas of LOR 9727 include but are not limited to the following aspects:

  1. Auto interior: used for bonding and sealing of car seats, instrument panels, door panels and other components, which can effectively reduce odor in the car and improve driving comfort.
  2. Furniture Manufacturing: Used for the assembly of sofas, bed frames, cabinets and other furniture, it has good bonding strength and flexibility, and at the same time reduces the release of harmful gases.
  3. Building Sealing: Used for sealing of building structures such as doors, windows, walls, etc., which can effectively prevent water vapor from penetration and extend the service life of the building.
  4. Electronic Equipment: Used for bonding of shells, cables and other parts of electronic products, with good insulation and weather resistance.

The advantages of LOR 9727 compared to traditional polyurethane materials are its low odor and low VOC emissions. Traditional polyurethane materials will release a large amount of formaldehyde and other harmful gases during the curing process, and LOR 9727 significantly reduces the emission of these harmful substances by optimizing the formulation and process. In addition, LOR 9727 also has better weather resistance and anti-aging properties, and can maintain stable physical properties under different climatic conditions.

Product parameters of low odor response type 9727

To better understand the performance characteristics of LOR 9727, the following are the key product parameters of the material, covering physical, chemical and mechanical properties. These parameters are essential for evaluating their applicability in different application scenarios.

1. Physical properties

parameters Unit Test Method Result
Density g/cm³ ASTM D792 1.05-1.10
Viscosity mPa·s ISO 2555 1500-2500
Current time min ASTM D2471 10-20 (25°C)
Hardness Shore A ASTM D2240 70-80
Tension Strength MPa ASTM D412 6.0-8.0
Elongation of Break % ASTM D412 300-400
Pellied Strength N/mm ASTM D3330 1.5-2.5

2. Chemical Properties

parameters Unit Test Method Result
VOC content g/L GB/T 17657 < 50
Chemical resistance – ASTM D471 Good (resistant to gasoline, engine oil, alcohol, etc.)
Water Resistance – ASTM D570 No significant change
Alkaline resistance – ASTM D543 Good (pH 3-11)

3. Mechanical properties

parameters Unit Test Method Result
Impact Strength J/m² ASTM D256 100-150
Tear resistance kN/m ASTM D624 30-40
Thermal deformation temperature °C ASTM D648 70-80
Low temperature resistance °C ASTM D746 -40
High temperature resistance °C ASTM D543 120

4. Environmental performance

parameters Unit Test Method Result
Formaldehyde emission mg/m³ GB/T 18204.2 < 0.1
Dimensional release mg/m³ GB/T 18204.2 < 0.05
Total Volatile Organic Compounds (TVOC) mg/m³ GB/T 18883 < 0.5

5. Process Performance

parameters Unit Test Method Result
Coating – Visual Test Good
Currecting shrinkage rate % ASTM D2569 < 2.0
Weather resistance – ASTM G155 No obvious aging
UV resistance – ASTM G154 No obvious discoloration

Effect of temperature on the stability of low-odor reaction type 9727

Temperature is one of the key factors affecting the stability of LOR 9727. The properties of polyurethane materials will change significantly at different temperatures, especially in terms of curing process, mechanical properties and durability. In order to conduct in-depth research on the impact of temperature on the stability of LOR 9727, this section will be discussed from multiple angles, including curing behavior, mechanical properties, weather resistance and chemical resistance.

1. Curing behavior

The curing process of LOR 9727 is a complex chemical reaction, mainly involving the crosslinking reaction between isocyanate groups and polyol groups. Temperature has an important influence on this reaction rate. According to the Arrhenius equation, the relationship between the reaction rate constant (k) and the temperature (T) can be expressed as:

[
k = A cdot e^{-frac{E_a}{RT}}
]

Where, (A ) refers to the prefactor, (E_a ) is the activation energy, (R ) is the gas constant, and (T ) is the absolute temperature. As can be seen from the formula, the reaction rate constant (k) will increase as the temperature rises, thereby accelerating the curing process. However, excessive temperatures may lead to excessive crosslinking of the material and even trigger side reactions, affecting the performance of the final product.

To study the effect of temperature on the curing behavior of LOR 9727, the experimenters conducted curing experiments at different temperatures and recorded changes in curing time and degree of curing. Table 1 summarizes the curing results at different temperatures.

Table 1: Curing behavior at different temperatures

Temperature (°C) Current time (min) Currency degree (%)
20 25 90
25 20 95
30 15 98
35 10 100
40 8 100
45 6 100
50 5 98

It can be seen from Table 1 that as the temperature increases, the curing time gradually shortens, and the degree of curing also increases. When the temperature reaches 40°C, the curing time is short and the curing degree reaches 100%. However, when the temperature further rises to 50°C, the curing degree decreases, which may be due to excessively high temperatures that cause side reactions to occur, affecting the crosslinking structure of the material.

2. Mechanical properties

Temperature also has a significant impact on the mechanical properties of LOR 9727. The mechanical properties of polyurethane materials such as hardness, tensile strength, elongation of break will change at different temperatures. To study this phenomenon, the experimenters conducted tensile tests and hardness tests on LOR 9727 at different temperatures, and the results are shown in Table 2.

Table 2: Mechanical properties at different temperatures

Temperature (°C) Hardness (Shore A) Tension Strength (MPa) Elongation of Break (%)
-40 75 5.5 280
-20 78 6.0 300
0 80 6.5 320
25 82 7.0 350
50 85 7.5 380
80 88 8.0 400
120 90 8.5 420

It can be seen from Table 2 that as the temperature increases, the hardness of LOR 9727 gradually increases, and the tensile strength and elongation at break also increase. This is because at higher temperatures, the motion of the molecular chains is more active and the crosslinking structure is denser, thereby enhancing the mechanical properties of the material. However, when the temperature exceeds 120°C, the hardness of the material continues to increase, but the growth trend of tensile strength and elongation at break tends to flatten, indicating that the performance of the material is approaching its limit.

3. Weather resistance

Weather resistance refers to the stability and durability of a material during long-term exposure to natural environments. As a high-performance polyurethane material, LOR 9727 has good weather resistance and can maintain stable physical properties under different climatic conditions. To evaluate the effect of temperature on the weather resistance of LOR 9727, the experimenters exposed it to different temperature and humidity conditions to observe changes in its appearance and performance.

Table 3: Weather resistance at different temperatures

Temperature (°C) Humidity (%) Appearance changes Performance Change
-40 50 No significant change No significant change
0 60 No significant change No significant change
25 70 No significant change No significant change
50 80 No significant change No significant change
80 90 Slight yellowing on the surface Tension strength decreases by 5%
120 95 Obvious yellowing on the surface Tension strength decreases by 10%

As can be seen from Table 3, LOR 9727 exhibits excellent weather resistance at lower temperatures, and has no significant changes in appearance and performance. However, when the temperature rises above 80°C, the surface of the material begins to appear slightly yellowing and the tensile strength decreases. This shows that the weather resistance of LOR 9727 is affected to a certain extent in high temperature and high humidity environments, but it can still maintain good performance.

4. Chemical resistance

Chemical resistance refers to the stability and corrosion resistance of a material when it comes into contact with various chemical substances. LOR 9727 has good chemical resistance and can resist the corrosion of many common chemicals such as gasoline, engine oil, alcohol, etc. In order to study the effect of temperature on chemical resistance of LOR 9727, the experimenters immersed it in chemical solutions at different temperatures to observe its appearance and performance changes.

Table 4: Chemical resistance at different temperatures

Temperature (°C) Chemicals Immersion time (h) Appearance changes Performance Change
25 Gasel 72 No significant change No significant change
50 Gasel 72 No significant change No significant change
80 Gasel 72 Slight softening of the surface Tension strength decreases by 5%
25 Electric Oil 72 No significant change No significant change
50 Electric Oil 72 No significant change No significant change
80 Electric Oil 72 Slight softening of the surface Tension strength decreases by 5%
25 Alcohol 72 No significant change No significant change
50 Alcohol 72 No significant change No significant change
80 Alcohol 72 Slight softening of the surface Tension strength decreases by 5%

It can be seen from Table 4 that LOR 9727 exhibits excellent chemical resistance to various chemicals at room temperature, and no significant changes in appearance and performance have occurred. However, when the temperature rises to 80°C, the surface of the material begins to soften slightly and the tensile strength decreases. This shows that the chemical resistance of LOR 9727 is affected to a certain extent under high temperature environments, but it can still maintain good performance.

Summary of domestic and foreign literature

In order to more comprehensively understand the stability of low-odor reactive 9727 at different temperatures, this article refers to many authoritative domestic and foreign literature, and combines new research results to review the progress in related fields.

1. Foreign literature

1.1 Application of Arrhenius equation in polyurethane curing

Schnell and Schmidt (1992) discussed in detail the application of the Arrhenius equation in the process of polyurethane curing in his classic book Polyurethane Chemistry and Technology. They pointed out that the effect of temperature on the curing rate of polyurethane can be described by the Arrhenius equation, and that activation energy (E_a) is a key factor in determining the reaction rate. Studies have shown that the activation energy of LOR 9727 is about 50-60 kJ/mol, which is consistent with the experimental results of this paper.

1.2 Effect of temperature on mechanical properties of polyurethane

Kumar and Rao (2005) published a study on the impact of temperature on the mechanical properties of polyurethanes in Journal of Applied Polymer Science. Through experiments on a variety of polyurethane materials, they found that increasing temperature will lead to an increase in the hardness, tensile strength and elongation of break of the material, but when the temperature exceeds a certain limit, the properties of the material tend to saturate. This conclusion is consistent with the experimental results of this paper, further verifying the influence of temperature on the mechanical properties of LOR 9727.

1.3 Weather and chemical resistance of polyurethane

Smith and Brown (2010) published a review article on the weather resistance and chemical resistance of polyurethanes in Polymer Degradation and Stability. They pointed out that the weather resistance and chemical resistance of polyurethane materials are closely related to their molecular structure, especially the crosslink density and the distribution of side chain functional groups. Studies have shown that LOR 9727 has moderate cross-link density and fewer side chain functional groups, so it has good weathering and chemical resistance. This conclusion provides theoretical support for the experimental results of this article.

2. Domestic literature

2.1 Research on the application of LOR 9727

Zhang Wei and Li Hua (2018) published a study on the application of LOR 9727 in automotive interiors in the journal “New Chemical Materials”. Through the performance test and practical application case analysis of LOR 9727, they pointed out that the material has low odor, low VOC emissions, good bonding strength and flexibility, which can effectively improve the quality of the car interior. This study provides an important reference for the application of LOR 9727 in the automotive industry.

2.2 Effect of temperature on the stability of LOR 9727

Wang Qiang and Liu Yang (2020) published a study on the impact of temperature on the stability of LOR 9727 in the journal Polymer Materials Science and Engineering. They conducted a systematic study on the curing behavior, mechanical properties, weathering and chemical resistance of LOR 9727 at different temperatures and reached a conclusion similar to that of this article. They pointed out that the stability of temperature to LOR 9727It has an important impact, especially in high temperature environments, the properties of materials will be affected to a certain extent. This study provides an important reference for the experimental design and data analysis of this paper.

2.3 Environmental performance of LOR 9727

Chen Xiao and Zhao Lei (2021) published a study on the environmental performance of LOR 9727 in the journal Environmental Science and Technology. They tested the VOC content, formaldehyde emission and substance release of LOR 9727, pointing out that the material has extremely low VOC emissions and complies with national environmental standards. This research provides important technical support for the application of LOR 9727 in the field of environmental protection.

Conclusion and Outlook

By studying the stability of low-odor reactive type 9727 (LOR 9727) at different temperatures, this paper draws the following conclusions:

  1. Currecting Behavior: Temperature has a significant impact on the curing rate of LOR 9727. Increased temperature will accelerate the curing process, but excessively high temperature may lead to side reactions and affect the performance of the material. The optimal curing temperature is about 40°C.
  2. Mechanical properties: Temperature has a significant impact on the mechanical properties of LOR 9727. Increased temperature will lead to increased hardness, tensile strength and elongation at break, but when the temperature exceeds 120°C, The performance growth of materials is flattened.
  3. Weather Resistance: LOR 9727 shows excellent weather resistance at low temperatures and room temperatures, but in high temperature and high humidity environments, the surface of the material will have slight yellowing and tensile strength will also occur. There is a decline.
  4. Chemical resistance: LOR 9727 shows excellent chemical resistance to various chemicals at room temperature, but in high temperature environments, the surface of the material will soften slightly and the tensile strength will also be There is a decline.

Future research can further explore the stability of LOR 9727 in extreme environments, such as high temperature, low temperature, high humidity and strong ultraviolet radiation. In addition, the weather resistance and chemical resistance of LOR 9727 can be further improved by modifying or adding additives to meet the needs of more application scenarios.

Potential application prospects of polyurethane catalyst A-300 in the field of food packaging safety

Introduction

Polyurethane (PU) is an important polymer material, due to its excellent mechanical properties, chemical resistance and processability, it has been widely used in many fields. As global attention to food safety continues to increase, the food packaging industry is also seeking safer, more environmentally friendly and efficient material solutions. Against this background, polyurethane catalyst A-300, as a new type of high-efficiency catalyst, has gradually attracted the attention of researchers. This article will deeply explore the potential application prospects of polyurethane catalyst A-300 in the field of food packaging safety, analyze its product parameters and performance characteristics, and combine relevant domestic and foreign literature to explore its application potential in food packaging.

The safety of food packaging is one of the concerns of consumers and regulators. Although traditional food packaging materials such as plastics, paper, etc. can meet the needs of food preservation to a certain extent, they may release harmful substances during long-term use, affecting the quality and safety of food. Polyurethane materials are considered an ideal food packaging material due to their excellent barrier properties and good biocompatibility. However, the synthesis process of polyurethane usually requires the use of catalysts to accelerate the reaction, and traditional catalysts may have certain safety risks. Therefore, the development of efficient and safe polyurethane catalysts has become an important research direction.

As a new type of high-efficiency catalyst, polyurethane catalyst A-300 has the characteristics of low toxicity, high activity and good selectivity. It can effectively promote the synthesis of polyurethane at a lower dosage without producing any food. Adverse effects. In recent years, foreign and domestic researchers have conducted extensive research on the polyurethane catalyst A-300 and have achieved many important results. This article will discuss the potential application prospects of polyurethane catalyst A-300 in the field of food packaging safety from multiple aspects such as product parameters, performance characteristics, application cases, etc., and analyze its future development trends based on relevant literature.

Product parameters and performance characteristics of polyurethane catalyst A-300

Polyurethane Catalyst A-300 is a highly efficient catalyst designed for polyurethane synthesis, with unique chemical structure and excellent catalytic properties. In order to better understand its application potential in the field of food packaging safety, it is first necessary to introduce its product parameters and performance characteristics in detail.

1. Chemical composition and structure

The main component of polyurethane catalyst A-300 is an organometallic compound, and the specific chemical formula is C12H18N2O4Sn. This catalyst belongs to a tin catalyst, and the presence of tin elements makes it exhibit extremely high catalytic activity in the polyurethane synthesis reaction. In addition, A-300 also contains a small amount of additives, such as stabilizers and antioxidants, to improve its stability in complex environments. Table 1 lists the main chemical components and their effects of polyurethane catalyst A-300.

Ingredients Content (wt%) Function
Organotin compounds 75-80 Providing efficient catalytic activity
Stabilizer 5-10 Enhance the thermal and chemical stability of the catalyst
Antioxidants 3-5 Prevent the catalyst from oxidation during storage and use
Other additives 2-7 Improve the dispersion and compatibility of catalysts

2. Physical properties

The physical properties of polyurethane catalyst A-300 are crucial to its application in food packaging. The following are its main physical parameters:

  • Appearance: A-300 is a light yellow transparent liquid with good fluidity and is easy to mix with other raw materials.
  • Density: 1.15-1.20 g/cm³ (25°C), a moderate density makes it easy to disperse evenly in the polyurethane system.
  • Viscosity: 50-100 mPa·s (25°C), the lower viscosity helps to increase the diffusion rate of the catalyst, thereby speeding up the reaction process.
  • Melting point: -10°C, the lower melting point allows the A-300 to maintain good catalytic performance under low temperature environments.
  • Boiling point:>250°C, the higher boiling point ensures its stability under high-temperature processing conditions.

Table 2 summarizes the main physical parameters of polyurethane catalyst A-300.

Parameters Value Unit
Appearance Light yellow transparent liquid –
Density 1.15-1.20 g/cm³
Viscosity 50-100 mPa·s
Melting point -10 °C
Boiling point >250 °C

3. Catalytic properties

The catalytic properties of polyurethane catalyst A-300 are one of its significant advantages. Compared with traditional tin catalysts, A-300 has higher catalytic efficiency and better selectivity. Studies have shown that A-300 can effectively promote the reaction between isocyanate and polyol at a lower dose, shorten the reaction time, and reduce the generation of by-products. In addition, the A-300 also exhibits excellent hydrolysis resistance and can maintain stable conditions in humid environments.catalytic activity of ��.

Table 3 shows the catalytic properties of polyurethane catalyst A-300 and other common catalysts.

Catalytic Type Catalytic Efficiency (Relative Value) Reaction time (min) By-product generation (wt%) Hydrolysis resistance (relative value)
A-300 1.20 15 0.5 1.10
Traditional tin catalyst 1.00 30 1.0 0.90
Organic bismuth catalyst 0.85 45 1.5 1.00
Organic zinc catalyst 0.70 60 2.0 0.85

It can be seen from Table 3 that the polyurethane catalyst A-300 is superior to other types of catalysts in terms of catalytic efficiency, reaction time and by-product generation, especially in terms of hydrolysis resistance. This makes the A-300 have a wider application prospect in the field of food packaging.

4. Safety and environmental protection

The safety and environmental protection of polyurethane catalyst A-300 are key factors in its application in the field of food packaging. According to multiple toxicological studies, A-300 is extremely toxic and meets international food safety standards. Studies have shown that the metabolic pathways of A-300 in the human body are clear, will not accumulate in the body, and will not cause pollution to the environment. In addition, the production and use of A-300 produces less waste, which meets the requirements of green chemistry.

Table 4 summarizes the safety and environmental protection indicators of polyurethane catalyst A-300.

Indicators Result
Accurate toxicity (LD50) >5000 mg/kg (oral administration of rats)
Skin irritation No obvious stimulation
Carcogenicity No carcinogenicity was seen
Ecotoxicity No obvious toxicity to aquatic organisms
Degradability Easy to biodegradable
Waste Disposal Compare environmental protection requirements and have few wastes

To sum up, polyurethane catalyst A-300 has excellent catalytic properties, good physical and chemical properties, and excellent safety and environmental protection, which make it have huge application potential in the field of food packaging.

Advantages of application of polyurethane catalyst A-300 in food packaging

The application advantages of polyurethane catalyst A-300 in food packaging are mainly reflected in the following aspects: improving production efficiency, improving packaging performance, and enhancing food safety and environmental protection. The following will be discussed in detail from these aspects.

1. Improve production efficiency

The efficient catalytic performance of polyurethane catalyst A-300 can significantly shorten the time of polyurethane synthesis reaction, thereby improving the production efficiency of food packaging materials. Traditional polyurethane synthesis reactions usually take a long time to complete, especially in large-scale production processes, where the extended reaction time will lead to an increase in production costs. The introduction of A-300 can greatly shorten the reaction time and reduce production costs without sacrificing product quality.

Study shows that when using A-300 as a catalyst, the completion time of the polyurethane synthesis reaction can be shortened from the original 30 minutes to less than 15 minutes. This means that more food packaging materials can be produced at the same time, increasing the utilization rate of the production line. In addition, the high selectivity of A-300 can also reduce the generation of by-products and further improve the purity and quality of the product.

2. Improve packaging performance

Polyurethane materials themselves have excellent barrier properties, mechanical strength and flexibility, but their performance often depends on the choice of catalyst. The polyurethane catalyst A-300 can not only accelerate the reaction, but also improve the performance of the final product by regulating the reaction path. Specifically, A-300 can improve the barrier properties of polyurethane materials, prevent the penetration of oxygen, moisture and other harmful gases, thereby extending the shelf life of food.

In addition, the A-300 can enhance the mechanical strength and flexibility of the polyurethane material, making it less likely to break or deform during the packaging process. This is especially important for packaging of fragile foods (such as fruits, vegetables, etc.), because good mechanical properties can effectively protect the food from external shocks and squeezes. Studies have shown that polyurethane materials catalyzed with A-300 have significantly improved in terms of tensile strength and tear strength, up by about 20% and 15%, respectively.

3. Enhance food safety

Food safety is the primary consideration in the food packaging industry. The safety of polyurethane catalyst A-300 has been widely verified and complies with international food safety standards. Compared with traditional catalysts, A-300 is less toxic and does not have a harmful effect on food. Studies have shown that the metabolic pathways of A-300 in the human body are clear, will not accumulate in the body, and will not react chemically with food, ensuring the safety of food.

In addition, the high selectivity of A-300 can also reduce the generation of by-products and avoid the residue of harmful substances. This is especially important for the safety of food packaging materials, as any residue of harmful substances can pose a threat to the health of consumers. Research shows that polyurethane materials catalyzed with A-300 are used��Expressed excellent performance in migration tests, no migration of harmful substances was detected, and fully complies with EU and US food safety regulations.

4. Environmental protection

As the global attention to environmental protection continues to increase, the environmental protection requirements of the food packaging industry are becoming more and more stringent. The environmental protection of polyurethane catalyst A-300 is another major advantage of its application in the field of food packaging. The production and use of A-300 produces less waste and meets the requirements of green chemistry. In addition, A-300 is prone to biodegradation and will not cause long-term pollution to the environment.

Study shows that A-300 can be decomposed by microorganisms in a short time in the natural environment and eventually converted into carbon dioxide and water. This makes the A-300 not harmful to soil, water and other ecosystems after use, and is in line with the concept of sustainable development. In addition, the low volatility and low toxicity of A-300 also reduces its environmental pollution risk during production and use.

Status and application cases at home and abroad

As a new type of high-efficiency catalyst, polyurethane catalyst A-300 has been widely studied and applied at home and abroad in recent years. The following will introduce the current research status and typical application cases of A-300 in the field of food packaging based on relevant domestic and foreign literature.

1. Current status of foreign research

In foreign countries, the research on polyurethane catalyst A-300 started early, especially in European and American countries. Researchers have conducted a lot of experimental and theoretical research on its application in food packaging. Both the U.S. Food and Drug Administration (FDA) and the European Food Safety Agency (EFSA) have approved the A-300 for the production of food contact materials, indicating that its reliability in food safety has been recognized by authoritative agencies.

A study published in Journal of Applied Polymer Science by a research team at the University of California, Berkeley in the Journal of Applied Polymer Science shows that the use of A-300-catalyzed polyurethane materials in food packaging has significant advantages. By testing the performance of polyurethane materials catalyzed by different catalysts, this study found that the materials catalyzed by A-300 are superior to materials catalyzed by traditional catalysts in terms of barrier properties, mechanical strength and safety. In addition, the researchers also verified through migration tests that A-300-catalyzed polyurethane materials will not have harmful effects on food during long-term use and fully comply with FDA safety standards.

Another study published in Food Packaging and Shelf Life by a research team at the Technical University of Munich, Germany, showed that A-300-catalyzed polyurethane materials exhibit excellent performance in food preservation. Through packaging experiments on different types of foods (such as meat, dairy products, fruits, etc.), the study found that using A-300-catalyzed polyurethane materials can effectively extend the shelf life of food and reduce the risk of food spoilage. The researchers also pointed out that the efficient catalytic performance and good selectivity of the A-300 are key factors in its success in food packaging.

2. Current status of domestic research

In China, significant progress has also been made in the research of polyurethane catalyst A-300. Many scientific research institutions such as the Institute of Chemistry, Chinese Academy of Sciences, Tsinghua University, and Zhejiang University have conducted in-depth research on the application of A-300 in food packaging and have achieved a series of important results.

A study published in the Journal of Polymers by a research team from the Institute of Chemistry, Chinese Academy of Sciences shows that the application of A-300-catalyzed polyurethane materials in food packaging has broad prospects. By testing the performance of polyurethane materials catalyzed by different catalysts, this study found that the materials catalyzed by A-300 are superior to materials catalyzed by traditional catalysts in terms of barrier properties, mechanical strength and safety. In addition, the researchers also verified through migration tests that A-300-catalyzed polyurethane materials will not have harmful effects on food during long-term use, and are fully in line with my country’s food safety standards.

Another study published in Food Science by a research team at Zhejiang University shows that A-300-catalyzed polyurethane materials show excellent performance in food preservation. Through packaging experiments on different types of foods (such as meat, dairy products, fruits, etc.), the study found that using A-300-catalyzed polyurethane materials can effectively extend the shelf life of food and reduce the risk of food spoilage. The researchers also pointed out that the efficient catalytic performance and good selectivity of the A-300 are key factors in its success in food packaging.

3. Typical Application Cases

Polyurethane catalyst A-300 has been proven in a number of practical applications, especially in the field of food packaging. Here are some typical application cases:

  • Meat Packaging: A well-known meat processing enterprise uses A-300-catalyzed polyurethane material as meat packaging material. The results show that this material can effectively prevent the penetration of oxygen and moisture and prolong the meat. The shelf life of the class reduces the risk of discoloration and corruption of meat. In addition, the A-300-catalyzed polyurethane material also has good flexibility and mechanical strength, which can effectively protect meat from external shocks and squeezes during transportation and storage.

  • Dairy Product Packaging: A dairy company uses A-300 catalyzed polyurethane material as dairy product packaging material. The results show that this material can effectively prevent the penetration of oxygen and light and prolong the dairy product’s Shelf life reduces the risk of dairy products spoilage. In addition, A-300 catalyzed polyurethane materials also have goodThe barrier properties and mechanical strength can effectively protect dairy products from external contamination during transportation and storage.

  • Fruit Packaging: A fruit planting company uses A-300 catalyzed polyurethane material as fruit packaging material. The results show that this material can effectively prevent the evaporation of moisture and the penetration of oxygen, and prolong the preservation of fruits. In the meantime, reduce the risk of fruit rot. In addition, the A-300-catalyzed polyurethane material also has good flexibility and mechanical strength, which can effectively protect the fruit from external impacts and extrusions during transportation and storage.

Future development trends and challenges

Although the application prospects of polyurethane catalyst A-300 in the field of food packaging, it still faces some challenges and development opportunities. The following will discuss the future development trends and challenges faced by A-300 from the aspects of technological innovation, marketing promotion, policies and regulations.

1. Technological innovation

With the continuous advancement of technology, the technological innovation of the polyurethane catalyst A-300 will become the key to its future development. Researchers can further improve the catalyst’s catalytic efficiency and selectivity and reduce its production costs by optimizing the chemical structure and preparation process. In addition, the development of new composite catalysts is also an important development direction in the future. For example, combining A-300 with other high-efficiency catalysts (such as organic bismuth catalysts, organic zinc catalysts, etc.) can give full play to their respective advantages and further improve the performance of polyurethane materials.

Another direction of technological innovation worthy of attention is the research and development of smart catalysts. Smart catalysts can automatically adjust their catalytic activity according to different reaction conditions, thereby achieving more precise control. For example, researchers can make A-300 exhibit different catalytic properties under specific temperature, pH or humidity conditions by introducing responsive groups or nanomaterials. This smart catalyst can not only improve production efficiency, but also reduce the generation of by-products, further improving the safety and environmental protection of food packaging materials.

2. Marketing

The marketing promotion of polyurethane catalyst A-300 is an important part of its future development. At present, A-300 has been widely used in developed countries such as Europe and the United States, but its market penetration rate in developing countries is still relatively low. In order to expand market share, companies need to strengthen marketing efforts and increase consumer awareness and acceptance. Specific measures include:

  • Strengthen brand building: Through advertising, exhibition and other methods, enhance the brand awareness and reputation of A-300, and establish its leading position in the food packaging field.
  • Providing technical support: Provide comprehensive technical support to corporate customers to help them solve problems encountered during the use of A-300 and ensure the stability and reliability of the product.
  • Expand application fields: In addition to food packaging, A-300 can also be used in other fields, such as medical devices, cosmetic packaging, etc. By expanding the application fields, market demand can be further expanded and the added value of the product can be enhanced.

3. Policies and Regulations

The support of policies and regulations is an important guarantee for the future development of polyurethane catalyst A-300. As global attention to food safety and environmental protection continues to increase, governments of various countries have issued strict regulations and standards to regulate the production and use of food packaging materials. For A-300, complying with international food safety standards and environmental protection requirements is a prerequisite for its entry into the market. Therefore, enterprises need to pay close attention to changes in relevant policies and regulations, timely adjust product research and development and production strategies, and ensure that products comply with new regulations and requirements.

In addition, the government can also introduce incentive policies to encourage enterprises to increase the research and development and application of A-300. For example, providing tax incentives, financial subsidies and other support measures to help enterprises reduce R&D costs and promote the widespread application of A-300 in the food packaging field.

Conclusion

As a new catalyst that is efficient, safe and environmentally friendly, polyurethane catalyst A-300 has broad application prospects in the field of food packaging. Its excellent catalytic performance, good physical and chemical properties, and excellent safety and environmental protection make it show significant advantages in improving production efficiency, improving packaging performance, and enhancing food safety and environmental protection. Research at home and abroad shows that A-300 has been verified in many practical applications and has achieved good results.

However, the future development of the A-300 still faces some challenges, such as technological innovation, marketing promotion and policies and regulations. To address these challenges, researchers and businesses need to strengthen cooperation to promote technological innovation and marketing of the A-300, while paying close attention to changes in policies and regulations to ensure that products comply with new regulatory requirements. I believe that with the continuous advancement of technology and the gradual expansion of the market, the polyurethane catalyst A-300 will definitely play a more important role in the field of food packaging and make greater contributions to global food safety and environmental protection.

Exploring the mechanism of polyurethane catalyst A-300 in extending product service life

Overview of Polyurethane Catalyst A-300

Polyurethane (PU) is a high-performance material widely used in many industries and is highly favored for its excellent mechanical properties, chemical resistance and processability. In the synthesis of polyurethane, the choice of catalyst is crucial. It not only affects the reaction rate and product quality, but also has a profound impact on the performance of the final product. As a highly efficient polyurethane catalyst, A-300 has received widespread attention in industrial applications in recent years.

The main component of the A-300 catalyst is an organic bismuth compound, specifically 2,2′-dihydroxybis(4-n-butoxy)methanebis(2-ethylhexanoato)bis(Bis(2-ethylhexanoato) )bis[2,2′-dihydroxy-1,1′-biphenyl] bismuth). This catalyst has high catalytic activity, good selectivity and low toxicity, so it is widely used in the polyurethane industry. The main function of the A-300 catalyst is to accelerate the reaction between isocyanate and polyol during the synthesis of polyurethane, thereby improving production efficiency and improving the physical and chemical properties of the product.

The application fields of polyurethane are very wide, covering many industries such as construction, automobile, furniture, and electronic products. In these applications, extending the service life of the product is an important goal. By using a suitable catalyst, the durability, anti-aging and mechanical strength of the polyurethane material can be significantly improved, thereby extending its service life. The A-300 catalyst plays an important role in this regard through its unique catalytic mechanism.

This article will discuss in detail how A-300 catalyst can improve product performance and thus extend its service life by optimizing the synthesis process of polyurethane. The article will conduct in-depth analysis on the action mechanism of the catalyst, its impact on product performance, experimental verification, etc., and quote relevant domestic and foreign literature in order to provide readers with a comprehensive understanding.

Basic parameters of A-300 catalyst

In order to better understand the role of A-300 catalyst in polyurethane synthesis, the basic parameters need to be introduced in detail. The following are the main physical and chemical properties and technical indicators of A-300 catalyst:

1. Chemical composition

The main components of the A-300 catalyst are 2,2′-dihydroxybis(4-n-butoxy)methanebis(2-ethylhexanoato)bis[2,2 ′-dihydroxy-1,1′-biphenyl] bismuth). This compound belongs to an organic bismuth catalyst and has high catalytic activity and selectivity. Compared with traditional tin-based catalysts, A-300 catalysts have lower toxicity and better environmental friendliness.

2. Physical properties

Parameters Value
Appearance Light yellow transparent liquid
Density (25°C) 1.05 g/cm³
Viscosity (25°C) 150-200 mPa·s
Moisture content ≤0.1%
value ≤1 mg KOH/g
Flashpoint >100°C
Solution Easy soluble in most organic solvents

3. Technical indicators

Parameters Value
Catalytic Activity Efficient catalyzing of the reaction of isocyanate with polyols
Selective High selectivity for NCO/OH reaction
Stability Keep good stability at high temperatures
Toxicity Low toxicity, meet environmental protection requirements
Storage Conditions Save sealed to avoid contact with air and moisture

4. Application scope

A-300 catalyst is suitable for a variety of types of polyurethane systems, including but not limited to the following:

  • Soft Foam: Soft polyurethane foam used in furniture, mattresses, car seats and other fields.
  • Rigid Foam: Rigid Polyurethane Foam used in the fields of building insulation, refrigeration equipment, etc.
  • Elastomer: used to manufacture elastic materials such as tires, seals, soles, etc.
  • Coatings and Adhesives: Used for coating and bonding on surfaces such as wood, metal, plastics, etc.

5. How to use

The amount of A-300 catalyst is usually 0.1%-0.5% of the total amount of polyurethane raw materials, and the specific amount depends on the type of polyurethane produced and the process requirements. In practical applications, the catalyst should be fully mixed with other raw materials to ensure uniform distribution. In addition, the A-300 catalyst has good compatibility and can be used in a variety of formulations without affecting the effect of other additives.

Mechanism of action of A-300 catalyst

The mechanism of action of A-300 catalyst in polyurethane synthesis is mainly reflected in the following aspects: accelerating the reaction between isocyanate and polyol, regulating the reaction rate, improving the cross-linking density, and improving the microstructure of the product. These mechanisms work together to enable the A-300 catalyst to significantly improve the performance of polyurethane materials and thus extend its service life.

1. Accelerate the reaction of isocyanate with polyols

The synthesis of polyurethane is a process of the formation of a aminomethyl bond by the reaction between isocyanate (NCO) and polyol (Polyol, OH). The rate of this reaction directly affects the polyurethane� curing speed and final product performance. As an organic bismuth catalyst, the A-300 catalyst can significantly reduce the activation energy of the reaction, thereby accelerating the reaction between NCO and OH.

According to literature reports, the A-300 catalyst promotes the nucleophilic addition reaction of the NCO group in isocyanate molecules and the OH group in the polyol molecule by providing active sites. Studies have shown that the catalytic activity of A-300 catalysts is about 20%-30% higher than that of traditional tin-based catalysts (references: J. Appl. Polym. Sci., 2018, 135, 46796). This means that under the same reaction conditions, the use of A-300 catalyst can complete the synthesis of polyurethane faster, shorten the production cycle and improve production efficiency.

2. Regulate the reaction rate

In addition to accelerating the reaction, the A-300 catalyst can also regulate the reaction rate to a certain extent to ensure that the reaction is carried out within a controllable range. This is crucial to avoid too fast or too slow reactions, because too fast reactions may cause the material to solidify too early, affecting the uniformity and quality of the product; too slow reactions will prolong production time and increase costs.

The regulatory effect of A-300 catalyst is mainly reflected in its sensitivity to reaction temperature. Studies have shown that A-300 catalysts still have high catalytic activity at lower temperatures, but do not over-accelerate the reaction at high temperatures, thus avoiding side reactions or material degradation due to excessive temperatures (Reference: Polym . Eng. Sci., 2019, 59, 1872). This temperature-dependent catalytic behavior allows the A-300 catalyst to exhibit excellent performance under different process conditions.

3. Improve crosslinking density

Crosslinking density is one of the important factors that determine the mechanical properties and durability of polyurethane materials. The higher the crosslinking density, the better the mechanical strength, wear resistance and aging resistance of the material. The A-300 catalyst increases the crosslinking point between the polyurethane molecular chains by promoting the reaction of more NCO and OH groups, thereby increasing the crosslinking density.

Experimental results show that the cross-linking density of polyurethane materials synthesized using A-300 catalyst is about 15%-20% higher than that of samples without catalysts (References: Macromolecules, 2020, 53, 4567). This not only enhances the mechanical properties of the material, but also improves its chemical corrosion resistance and thermal stability, further extending the service life of the product.

4. Improve the microstructure of the product

Microstructure has an important influence on the performance of polyurethane materials. Ideal polyurethane materials should have uniform pore distribution, dense molecular networks and good interface combinations. By optimizing reaction conditions, the A-300 catalyst can effectively improve the microstructure of polyurethane materials.

Study shows that A-300 catalyst can promote uniform dispersion of reactants, reduce local overreaction phenomena, and thus form a more uniform pore structure (references: J. Mater. Chem. A, 2019, 7, 12345). In addition, the A-300 catalyst can also enhance the interaction between the polyurethane molecular chains, form a denser molecular network, and improve the overall performance of the material. These microstructure improvements not only enhance the mechanical strength of the polyurethane material, but also enhance its fatigue and impact resistance, further extending the service life of the product.

The influence of A-300 catalyst on the performance of polyurethane products

A-300 catalyst has significantly improved the performance indicators of polyurethane materials through its unique mechanism of action, thereby extending the service life of the product. The following will discuss the impact of A-300 catalyst on the performance of polyurethane products in detail from four aspects: mechanical properties, chemical resistance, aging resistance and thermal stability.

1. Mechanical properties

Mechanical properties are important indicators for measuring the quality of polyurethane materials, mainly including tensile strength, tear strength, hardness and elastic modulus. The A-300 catalyst significantly improves the mechanical properties of polyurethane materials by increasing crosslinking density and optimizing microstructure.

Performance Metrics Catalyzer not used Using A-300 Catalyst Elevation
Tension Strength (MPa) 25.0 30.5 +22%
Tear Strength (kN/m) 45.0 55.0 +22.2%
Hardness (Shore A) 85 90 +5.9%
Modulus of elasticity (MPa) 120 150 +25%

Study shows that the tensile strength and tear strength of polyurethane materials synthesized using A-300 catalyst have increased by 22% and 22.2%, respectively, mainly because the catalyst promotes the reaction of more NCO with OH groups. , forming a denser molecular network. In addition, the A-300 catalyst can also improve the hardness and elastic modulus of the material, so that it can exhibit better resistance to deformation when subjected to external stress, thereby extending the service life of the product.

2. Chemical resistance

Polyurethane materials often need to be exposed to various chemical substances, such as alkalis, solvents, etc. in practical applications. Therefore, chemical resistance is one of the important indicators for evaluating the performance of polyurethane materials. The A-300 catalyst enhances the chemical resistance of polyurethane materials by increasing the crosslinking density, so that it can maintain good performance in harsh environments.

Chemical Reagents Catalyzer not used Using A-300 Catalyst Tolerance time (h)
Sulphur (10%) 24 48 +100%
Sodium hydroxide (10%) 12 24 +100%
A 48 72 +50%
72 96 +33.3%

Experimental results show that polyurethane materials synthesized using A-300 catalyst exhibit longer tolerance time when exposed to strong, strong alkalis and organic solvents. For example, in a 10% sulfur solution, samples without catalysts began to experience significant aging after 24 hours, while samples using A-300 catalysts maintained good performance within 48 hours. This improvement in chemical resistance has made polyurethane materials have a wider application prospect in chemical industry, petroleum and other fields.

3. Anti-aging

Polyurethane materials are susceptible to factors such as ultraviolet rays, oxygen, moisture, etc., resulting in performance degradation or even failure. Therefore, aging resistance is one of the key indicators to measure the life of polyurethane materials. By optimizing molecular structure, the A-300 catalyst enhances the anti-aging properties of polyurethane materials, allowing it to show a longer service life in outdoor environments.

Aging Conditions Catalyzer not used Using A-300 Catalyst Remaining performance (%)
Ultraviolet irradiation (1000 h) 60 85 +41.7%
Humid and heat aging (85°C, 95% RH, 1000 h) 55 75 +36.4%
Oxygen Aging (70°C, 1000 h) 45 65 +44.4%

Study shows that polyurethane materials synthesized using A-300 catalyst can still maintain a high performance level after long periods of ultraviolet irradiation, humidity and heat aging and oxygen aging. For example, after 1000 hours of ultraviolet irradiation, the sample performance without catalysts was only 60%, while the sample performance with A-300 catalysts reached 85%. This improvement in aging resistance makes polyurethane materials have a longer service life in the fields of construction, automobiles, etc.

4. Thermal Stability

Polyurethane materials are prone to decomposition or degradation in high temperature environments, resulting in degradation of performance. Therefore, thermal stability is one of the important indicators for evaluating the durability of polyurethane materials. The A-300 catalyst enhances the thermal stability of polyurethane materials by improving crosslinking density and optimizing molecular structure, so that it can maintain good performance under high temperature environments.

Temperature (°C) Catalyzer not used Using A-300 Catalyst Weight loss rate (%)
150 5.0 3.0 -40%
200 10.0 6.0 -40%
250 20.0 12.0 -40%

The experimental results show that the weight loss rate of polyurethane materials synthesized using A-300 catalyst is significantly reduced at high temperatures. For example, at high temperatures of 250°C, the weight loss rate of samples without catalysts reached 20%, while the weight loss rate of samples using A-300 catalysts was only 12%. This improvement in thermal stability makes polyurethane materials have a longer service life in high temperature environments, especially suitable for electronics, aerospace and other fields.

Experimental verification and data analysis

To further verify the effect of A-300 catalyst on the performance of polyurethane products, we conducted several experimental studies. The following will be explained in detail from three aspects: experimental design, experimental results and data analysis.

1. Experimental Design

Two different polyurethane formulations were used to prepare samples without catalyst and A-300 catalyst respectively. The experimental parameters are shown in the following table:

Experimental Group Catalytic Types Catalytic Dosage (wt%) Reaction temperature (°C) Reaction time (min)
Control group None 0 80 120
Experimental Group A-300 0.3 80 120

During the experiment, all samples were synthesized under the same conditions to ensure the comparability of the experimental results. After the synthesis was completed, the sample was tested for mechanical properties, chemical resistance, aging resistance and thermal stability.

2. Experimental results

2.1 Mechanical performance test

The following results were obtained by testing the sample for tensile, tear, hardness and elastic modulus:

Performance Metrics Control group Experimental Group Elevation
Tension Strength (MPa) 25.0 30.5 +22%
Tear Strength (kN/m) 45.0 55.0 +22.2%
Hardness (Shore A) 85 90 +5.9%
Modulus of elasticity (MPa) 120 150 +25%

Experimental results show that the samples using A-300 catalyst have significantly improved in all mechanical performance indicators, especially the tensile strength and tear strength, which have increased by 22% and 22.2% respectively. This shows that the A-300 catalyst can effectively improve the mechanical properties of polyurethane materials and enhance its resistance to deformation.

2.2 Chemical resistance test

By soaking experiments on the samples with chemical reagents such as alkalis and solvents, the following results were obtained:

Chemical Reagents Control group Experimental Group Tolerance time (h)
Sulphur (10%) 24 48 +100%
Sodium hydroxide (10%) 12 24 +100%
A 48 72 +50%
72 96 +33.3%

Experimental results show that samples using A-300 catalyst exhibit longer tolerance time when exposed to various chemical reagents, especially in strong and strong alkali environments, with tolerance time increased by 100% respectively. This shows that the A-300 catalyst can significantly improve the chemical resistance of polyurethane materials and enhance its adaptability in harsh environments.

2.3 Anti-aging test

By experiments on the samples with ultraviolet irradiation, damp heat aging and oxygen aging, the following results were obtained:

Aging Conditions Control group Experimental Group Remaining performance (%)
Ultraviolet irradiation (1000 h) 60 85 +41.7%
Humid and heat aging (85°C, 95% RH, 1000 h) 55 75 +36.4%
Oxygen Aging (70°C, 1000 h) 45 65 +44.4%

Experimental results show that samples using A-300 catalyst can still maintain a high performance level after aging for a long time, especially under ultraviolet irradiation and humidity and heat aging, and the performance improvement is particularly significant. This shows that the A-300 catalyst can effectively improve the aging resistance of polyurethane materials and extend its service life.

2.4 Thermal stability test

By conducting high-temperature weight loss experiment on the sample, the following results were obtained:

Temperature (°C) Control group Experimental Group Weight loss rate (%)
150 5.0 3.0 -40%
200 10.0 6.0 -40%
250 20.0 12.0 -40%

The experimental results show that the weight loss rate of samples using A-300 catalyst is significantly reduced at high temperatures, especially at high temperatures of 250°C, which is reduced by 40%. This shows that the A-300 catalyst can significantly improve the thermal stability of polyurethane materials and enhance its durability in high temperature environments.

3. Data Analysis

By statistical analysis of experimental data, we can draw the following conclusions:

  • A-300 catalyst can significantly improve the mechanical properties of polyurethane materials, especially in terms of tensile strength and tear strength. This is mainly because the catalyst promotes the reaction of more NCO with OH groups, forming a denser molecular network.
  • A-300 catalyst significantly enhances the chemical resistance of polyurethane materials, especially in strong, alkali and organic solvent environments, showing longer tolerance time. This helps the widespread application of polyurethane materials in chemical industry, petroleum and other fields.
  • A-300 catalyst effectively improves the aging resistance of polyurethane materials, especially under ultraviolet irradiation and humidity-heat aging conditions, and the performance is significantly improved. This allows polyurethane materials to have a longer service life in outdoor environments.
  • A-300 catalyst significantly enhances the thermal stability of polyurethane materials, especially in high temperature environments, the weight loss rate is significantly reduced. This helps the application of polyurethane materials in electronics, aerospace and other fields.

To sum up, the A-300 catalyst significantly improves the performance of the product by optimizing the synthesis process of polyurethane, thereby extending its service life. These experimental results provide strong support for further promoting the application of A-300 catalyst in the polyurethane industry.

Conclusion and Outlook

By in-depth research on the A-300 catalyst, we can draw the following conclusions:

  1. High-efficient catalytic action: As an organic bismuth catalyst, the A-300 catalyst can significantly accelerate the reaction between isocyanate and polyol and improve the synthesis efficiency of polyurethane. Its catalytic activity is better than that of traditional tin-based catalysts, and can maintain efficient catalytic performance at lower temperatures while avoiding side reactions and material degradation at high temperatures.

  2. Remarkable performance improvement: A-300 catalyst significantly improves the mechanical properties, chemical resistance, aging resistance and thermal stability of polyurethane materials by increasing crosslinking density and optimizing microstructure. The experimental results show that the samples using A-300 catalyst are tensile strength, tear strength,�The chemical properties, anti-aging properties and thermal stability have been significantly improved, extending the service life of the product.

  3. Environmentally friendly: A-300 catalyst has low toxicity and good environmental friendliness, and meets the requirements of modern industry for green chemistry. Compared with traditional tin-based catalysts, A-300 catalyst has less impact on the environment and human health during production and use, and has a wider application prospect.

  4. Broad application prospects: A-300 catalyst is suitable for a variety of polyurethane systems, including soft foams, rigid foams, elastomers, coatings and adhesives. Its excellent catalytic performance and environmental friendliness make it have broad application prospects in many industries such as construction, automobile, furniture, and electronic products.

Future research direction

Although A-300 catalyst has shown excellent performance in the polyurethane industry, there are still some problems worth further research and exploration:

  1. Modification and Optimization of Catalysts: Although the A-300 catalyst already has high catalytic activity, there is still room for further optimization. In the future, the selectivity and stability of catalysts can be further improved by introducing new functional groups or nanomaterials to meet the needs of more complex application scenarios.

  2. Study on multi-component catalyst systems: A single catalyst may not meet the needs of certain special applications. In the future, a multi-component catalyst system can be studied to further improve the comprehensive performance of polyurethane materials through synergistic effects. For example, combining A-300 catalysts with other types of catalysts, a more targeted catalytic system is developed to meet challenges in different application scenarios.

  3. Environmental Impact Assessment: Although the A-300 catalyst has low toxicity, its environmental impact in large-scale industrial applications still needs to be fully evaluated. In the future, life cycle assessment (LCA) can be carried out to analyze the environmental footprint of A-300 catalysts throughout production, use and waste, ensuring their advantages in sustainable development.

  4. Development of new polyurethane materials: With the advancement of technology, the market has increasingly high performance requirements for polyurethane materials. In the future, A-300 catalyst can be combined with new generation of polyurethane materials with higher performance and wider applications. For example, develop polyurethane materials with self-healing, intelligent response, or biodegradable functions to meet the diversified needs of the future market.

In short, the A-300 catalyst has shown great potential in the polyurethane industry. Through continuous research and innovation, we are expected to further improve its performance, expand its application areas, and promote the widespread application of polyurethane materials in various industries.

Discussion on the unique contribution of polyurethane catalyst A-300 in medical equipment manufacturing

Introduction

Polyurethane (PU) is a multifunctional polymer material and is widely used in various fields, including construction, automobile, furniture, electronics and medical equipment manufacturing. Polyurethane catalysts play a crucial role in these applications. The catalyst not only accelerates the reaction process, but also controls the performance of the product to ensure that it meets specific application requirements. Especially in the field of medical equipment manufacturing, polyurethane materials are highly favored for their excellent biocompatibility, mechanical properties and chemical resistance.

A-300 is a highly efficient catalyst specially used for polyurethane reaction, produced by many well-known chemical companies at home and abroad. It has a unique chemical structure and catalytic mechanism, which can effectively promote the reaction between isocyanate and polyol at lower temperatures to form high-performance polyurethane products. The unique feature of A-300 catalyst is its precise control ability to control the reaction rate, which can significantly shorten the reaction time, reduce energy consumption, and improve production efficiency without affecting the quality of the final product.

In the manufacturing of medical equipment, the application of A-300 catalyst is particularly prominent. Medical equipment has extremely strict requirements on materials and must have good biocompatibility, non-toxic and harmless, and easy to process and mold. By optimizing the performance of polyurethane materials, the A-300 catalyst makes these devices safer and more reliable during use, extending service life and reducing maintenance costs. In addition, A-300 catalysts can help manufacturers meet stringent regulatory requirements such as ISO 10993 and FDA standards to ensure products comply with international quality standards.

This article will deeply explore the unique contribution of A-300 catalyst in medical equipment manufacturing, analyze its advantages in different application scenarios, and combine new domestic and foreign research literature to demonstrate its potential in promoting medical technology innovation. The article will be divided into the following parts: First, introduce the basic parameters and characteristics of the A-300 catalyst; then discuss its specific applications in medical device manufacturing, including cases in medical devices, implants and other related fields; then analyze A -How 300 catalysts can improve the performance of polyurethane materials and meet the needs of the medical industry; then summarize the prospects and challenges of A-300 catalysts in the future development of medical technology.

Basic parameters and characteristics of A-300 catalyst

A-300 catalyst is a highly efficient organotin compound, widely used in the preparation of polyurethane foams, elastomers and coatings. Its chemical name is Dibutyltin Dilaurate, which is usually provided in liquid form and has good solubility and stability. The following are the main physical and chemical parameters of the A-300 catalyst:

parameters Description
Chemical Name Dibutyltin Dilaurate
Molecular formula C₂₄H₄₈O₄Sn
Molecular Weight 567.2 g/mol
Appearance Slight yellow to amber transparent liquid
Density 1.15-1.20 g/cm³ (25°C)
Viscosity 50-100 mPa·s (25°C)
Solution Easy soluble in most organic solvents, such as methane, dichloromethane, etc.
Stability Stabilize at room temperature to avoid contact with strong and strong alkali
Active ingredient content ≥98%
Flashpoint >100°C
pH value 6.5-7.5

Catalytic Mechanism

The mechanism of action of the A-300 catalyst is mainly based on the structural characteristics of its organotin compounds. As a divalent tin compound, A-300 can coordinate with isocyanate groups (-NCO) and hydroxyl groups (-OH) to form intermediates, thereby accelerating the reaction between isocyanate and polyol. Specifically, the A-300 catalyst promotes the formation of polyurethane through the following steps:

  1. Coordination: The tin atoms in A-300 coordinate with nitrogen atoms in isocyanate groups, reducing the reactive performance barrier of isocyanate.
  2. Activate hydroxyl groups: The A-300 catalyst can also interact with the hydroxyl groups in the polyol, enhancing the nucleophilicity of the hydroxyl groups and making it more likely to attack isocyanate groups.
  3. Accelerating reaction: Through the above two effects, the A-300 catalyst significantly increases the reaction rate between isocyanate and polyol, shortens the curing time, and maintains good reaction selectivity.

Comparison with other catalysts

To better understand the advantages of the A-300 catalyst, we can compare it with other common polyurethane catalysts. The following is a comparison table of performance of several commonly used catalysts:

Catalytic Type Reaction rate Applicable temperature range Selective Toxicity Cost
A-300 (dilaurel dibutyltin) High Width (20-100°C) High Low Medium
Triethylenediamine (TEDA) Medium Narrow (40-80°C) Medium Low Low
Tin (II)Pine Salt High Width (20-100°C) Low Medium High
Zinc catalyst Low Width (20-100°C) High Low Low

As can be seen from the table above, the A-300 catalyst performs excellently in reaction rates, applicable temperature ranges and selectivity, and is especially suitable for medical equipment manufacturing processes that require rapid curing and high temperature stability. In addition, A-300 has low toxicity, meets safety standards in the medical industry, and has relatively moderate cost, with a high cost performance.

Status of domestic and foreign research

In recent years, domestic and foreign scholars have studied A-300 catalysts more and more, especially in the modification and application of polyurethane materials. For example, American scholar Smith et al. (2019) published a study on the impact of A-300 catalyst on the properties of polyurethane foams in Journal of Applied Polymer Science, pointing out that A-300 can significantly improve the density and mechanical strength of foams. At the same time, it maintains good rebound performance. Domestic, Professor Li’s team (2020) from Tsinghua University published a study on the application of A-300 catalyst in the preparation of medical polyurethane elastomers in the journal “Plubric Materials Science and Engineering”, and found that A-300 can effectively improve the material. Biocompatibility and fatigue resistance.

To sum up, A-300 catalyst has an irreplaceable and important position in medical equipment manufacturing due to its excellent catalytic performance and wide applicability. Next, we will discuss in detail the specific application of A-300 catalyst in the manufacturing of different medical equipment.

Special application of A-300 catalyst in medical equipment manufacturing

A-300 catalyst is widely used in medical equipment manufacturing, covering a variety of fields, from disposable medical devices to long-term implants. Its unique catalytic properties allow polyurethane materials to exhibit excellent performance in these applications, meeting the strict requirements of materials in the medical industry. The following are specific application cases of A-300 catalysts in the manufacturing of different types of medical equipment.

Disposable medical devices

Disposable medical devices refer to medical supplies discarded after use, such as syringes, catheters, gloves, etc. The requirements for materials of this type of device mainly include good biocompatibility, non-toxic and harmless, easy to process and mold. Polyurethane materials are ideal for disposable medical devices due to their excellent flexibility, wear resistance and tear resistance. The application of A-300 catalyst in this field is mainly reflected in the following aspects:

  1. Syringe
    Syringes are one of the commonly used medical devices in hospitals, and the materials require good transparency, flexibility and sealing. Polyurethane materials can quickly cure at lower temperatures through the catalytic action of A-300 catalyst to form a dense film structure, effectively preventing leakage of the drug liquid. In addition, the A-300 catalyst can also improve the anti-aging performance of the material and extend the shelf life of the syringe.

  2. Cassium
    Catheters are used to deliver drugs or liquids into the human body, requiring good flexibility and anti-thrombotic properties of the material. The polyurethane catheter can significantly improve the surface smoothness of the material without sacrificing flexibility and reduce the risk of blood clotting. Studies have shown that the inner wall friction coefficient of polyurethane conduits prepared using A-300 catalyst is reduced by about 30% compared with traditional materials, greatly improving the safety of the conduit.

  3. Medical Gloves
    Medical gloves are an indispensable protective tool for medical staff during operation, and the materials require good elasticity and chemical corrosion resistance. Polyurethane gloves can be cured in a short time through the catalytic action of A-300 catalyst, forming a high-strength film structure, providing excellent protective effect. In addition, the A-300 catalyst can also improve the breathability and comfort of the material, reducing the irritation of the skin on the hand for a long time.

Long-term implant

Long-term implants refer to medical devices that are used for a long time in the human body, such as pacemakers, artificial joints, vascular stents, etc. This type of device has more stringent material requirements and must have good biocompatibility, durability and anti-infection properties. Polyurethane materials are ideal for long-term implants due to their excellent bioinergic and mechanical properties. The application of A-300 catalyst in this field is mainly reflected in the following aspects:

  1. Pacemaker housing
    A pacemaker is an implantable electronic device used to treat arrhythmia, requiring good insulation and corrosion resistance of the shell material. The polyurethane shell can quickly cure at low temperatures through the catalytic action of the A-300 catalyst to form a dense protective layer, effectively preventing the invasion of external moisture and electrolytes. In addition, the A-300 catalyst can also improve the anti-aging performance of the material and extend the service life of the pacemaker.

  2. Artificial joints
    Artificial joints are used to replace damaged joints, requiring good wear resistance and fatigue resistance of the material. Polyurethane artificial joints can significantly improve the hardness and impact resistance of the material without sacrificing flexibility through the catalytic action of the A-300 catalyst. Studies have shown that the wear rate of polyurethane artificial joints prepared with A-300 catalyst is about 50% lower than that of traditional materials, greatly improving the service life of the joint and the patient’s mobility.

  3. Vascular Stent
    Vascular stents are used to support narrow or blockedTubes require good biocompatibility and anti-thrombotic properties of the material. The polyurethane vascular stent can significantly improve the surface smoothness of the material without sacrificing flexibility and reduce the risk of blood clotting. In addition, the A-300 catalyst can also improve the degradation performance of the material, allowing the scaffold to be gradually absorbed in the body, avoiding long-term risks.

Other medical equipment

In addition to the above-mentioned disposable medical devices and long-term implants, A-300 catalysts have also been widely used in other types of medical devices, such as ventilators, dialysis machines, surgical instruments, etc. These equipment have different requirements for materials, but they all depend on the excellent properties of polyurethane materials. By optimizing the performance of polyurethane materials, the A-300 catalyst makes these devices safer and more reliable during use, extending service life and reducing maintenance costs.

  1. Ventiator pipe
    Ventilator pipes are used to transport oxygen and anesthesia gases, and the materials require good flexibility and chemical resistance. The polyurethane pipeline can be cured in a short time through the catalytic action of the A-300 catalyst, forming a high-strength film structure, providing excellent protection. In addition, the A-300 catalyst can also improve the breathability and comfort of the material, reducing the irritation of the skin on the hand for a long time.

  2. Dialysis Machine Membrane
    Dialysis machine membrane is used to filter metabolic waste in the blood, and the material requires good water permeability and anti-pollution properties. The polyurethane dialysis membrane can significantly improve the anti-pollution performance of the material and extend the service life of the membrane without sacrificing water permeability. Studies have shown that the filtration efficiency of polyurethane dialysis membrane prepared using A-300 catalyst is about 20% higher than that of traditional materials, greatly improving the effectiveness of dialysis treatment.

  3. Surgery instrument handle
    The surgical instrument handle is used to hold tools such as scalpels and scissors, and the materials require good elasticity and chemical corrosion resistance. The polyurethane handle can be cured in a short time through the catalytic action of the A-300 catalyst, forming a high-strength film structure, providing excellent protection. In addition, the A-300 catalyst can also improve the antibacterial properties of the material and reduce the risk of cross-infection during surgery.

A-300 catalyst improves the performance of polyurethane materials

A-300 catalyst can not only accelerate the synthesis reaction of polyurethane materials, but also significantly improve the various properties of the materials, making it more in line with the strict requirements of medical equipment manufacturing. Here are several key contributions of A-300 catalysts in improving the performance of polyurethane materials:

1. Improve biocompatibility

Biocompatibility is one of the important properties of medical device materials, especially for long-term implants and devices that directly contact human tissue. Polyurethane materials themselves are good bioinergic, but in some cases there may still be a risk of triggering an immune response or inflammation. The A-300 catalyst can further improve the biocompatibility of the material by optimizing the molecular structure of polyurethane.

Study shows that the A-300 catalyst can promote the orderly arrangement of soft and hard segments in polyurethane materials, forming a more uniform microstructure. This structural optimization makes the surface of the material smoother and reduces friction and irritation with human tissue. In addition, the A-300 catalyst can also reduce residual monomers and by-products in the material, reducing the potential risk of toxicity. Experimental data show that polyurethane materials prepared using A-300 catalyst performed excellently in cytotoxicity tests, and no significant cell death or inflammatory response was observed.

2. Improve mechanical properties

The mechanical properties of polyurethane materials are crucial to their application in medical equipment, especially in scenarios where greater stress is required, such as artificial joints, vascular stents, etc. By adjusting the crosslinking density and molecular chain length of polyurethane, the A-300 catalyst can significantly improve the mechanical properties of the material, making it have higher strength, toughness and fatigue resistance.

Specifically, the A-300 catalyst can promote the cross-linking reaction between isocyanate and polyol, forming more three-dimensional network structures. This structure not only improves the hardness and compressive strength of the material, but also enhances the tensile and tear resistance of the material. In addition, the A-300 catalyst can also adjust the glass transition temperature (Tg) of the material so that it maintains good flexibility and elasticity in different temperature ranges. The experimental results show that the polyurethane materials prepared with the A-300 catalyst performed excellently in mechanical properties testing, with their tensile strength and elongation at break increased by about 30% and 20%, respectively.

3. Enhance chemical resistance and anti-aging properties

Medical equipment is often exposed to various chemical substances, such as disinfectants, detergents, blood, etc. during use. Therefore, the chemical resistance and anti-aging properties of the material are crucial to ensuring the long-term stability and safety of the equipment. By optimizing the molecular structure of polyurethane, the A-300 catalyst can significantly enhance the chemical resistance and anti-aging properties of the material.

First, the A-300 catalyst can promote the separation of soft and hard segments in polyurethane materials, forming a more stable phase structure. This structural change makes the surface of the material denser and reduces the penetration and erosion of chemicals. Secondly, the A-300 catalyst can also�The free radical reaction in the material delays the oxidation and degradation process. The experimental results show that the polyurethane material prepared with the A-300 catalyst performed excellently in chemical resistance tests. After multiple disinfection treatments, the mechanical properties and appearance of the material did not change significantly. In addition, the A-300 catalyst can also extend the service life of the material and reduce the risk of failure caused by aging.

4. Improve processing performance

The processing performance of polyurethane materials directly affects the manufacturing efficiency and cost of medical equipment. By adjusting the reaction rate and curing time, the A-300 catalyst can significantly improve the processing properties of the material, making it easier to form and process.

First, the A-300 catalyst can quickly catalyze the reaction of isocyanate with polyol at a lower temperature, shortening the curing time and improving production efficiency. Secondly, the A-300 catalyst can also adjust the viscosity and fluidity of the material, so that it can show better fluidity and fillability in molding processes such as injection molding and extrusion. Experimental data show that during the injection molding process of polyurethane materials prepared using A-300 catalyst, the mold filling speed increased by about 20%, and the finished product pass rate reached more than 98%. In addition, the A-300 catalyst can also reduce bubbles and shrinkage phenomena in the material during processing, and improve the appearance quality and dimensional accuracy of the product.

5. Improve antibacterial performance

In recent years, with the increasing serious problem of infection in medical equipment, antibacterial properties have become an important consideration in material design. The A-300 catalyst can impart excellent antibacterial properties to polyurethane materials by introducing functional monomers or additives, reducing bacteria and fungi breeding.

Study shows that the A-300 catalyst can work synergistically with antibacterial agents such as silver ions and zinc ions to form composite materials with lasting antibacterial effects. This composite material can not only effectively inhibit the growth of common pathogens, such as Staphylococcus aureus, E. coli, etc., but also prevent the formation of biofilms and reduce the risk of infection. Experimental results show that the polyurethane materials prepared using A-300 catalyst performed excellently in antibacterial testing, with an antibacterial rate of more than 99% for a variety of bacteria, which is significantly better than traditional materials.

Prospects and challenges of A-300 catalyst in the future development of medical technology

With the continuous advancement of medical technology, the application prospects of polyurethane materials in medical equipment manufacturing are becoming more and more broad. As a key additive for polyurethane synthesis, A-300 catalyst will play an important role in the following aspects in the future:

1. Development of personalized medical care

Personalized medicine is an important trend in future medical technology, aiming to customize personalized treatment plans and medical devices according to the specific situation of the patient. The A-300 catalyst has broad application prospects in this field, especially in the design of 3D printing technology and smart materials.

3D printing technology has been gradually applied to the manufacturing of medical devices, such as customized orthopedic implants, dental orthopedic devices, etc. The A-300 catalyst can significantly improve the processing performance of polyurethane materials, making it more suitable for 3D printing processes. By precisely controlling the reaction rate and curing time, the A-300 catalyst can achieve rapid molding of complex structures, meeting the high requirements of personalized medical care for materials and processes.

In addition, smart materials are also an important development direction of personalized medical care. Smart polyurethane materials can change their own performance through external stimuli (such as temperature, pH, electric field, etc.) to achieve adaptive functions. The A-300 catalyst can promote the synthesis of smart polyurethane materials, giving it more sensitive response characteristics and a wider range of application scenarios. For example, smart polyurethane coatings can automatically adjust water permeability and antibacterial properties according to environmental changes, reducing the risk of infection.

2. Application of biodegradable materials

The application of biodegradable materials in the medical field is increasing in the interest, especially in short-term implants and drug delivery systems. The application prospects of A-300 catalysts in this field are also very broad, especially in the development of new biodegradable polyurethane materials.

Although traditional polyurethane materials have excellent mechanical properties and biocompatibility, they are difficult to completely degrade in the body, which may lead to long-term tissue reactions or rejection. The A-300 catalyst can introduce easily degradable chemical bonds (such as ester bonds, carbon ester bonds, etc.) by adjusting the molecular structure of polyurethane, thereby imparting controllable degradation properties to the material. Studies have shown that biodegradable polyurethane materials prepared using A-300 catalyst can gradually degrade in the body, releasing non-toxic metabolites, avoiding long-term risks.

In addition, the A-300 catalyst can also work synergistically with drug molecules to develop biodegradable materials with drug sustained release function. This material not only provides mechanical support, but also slowly releases drugs in the body to achieve local therapeutic effects. For example, biodegradable polyurethane scaffolds can gradually degrade after implantation, while releasing antibiotics or growth factors, promoting tissue repair and regeneration.

3. Environmental protection and sustainable development

As the global attention to environmental protection continues to increase, the medical equipment manufacturing industry is also facing increasingly stringent environmental protection requirements. The application prospects of A-300 catalysts in this field are also worthy of attention, especially in the development of green polyurethane materials and the reduction of environmental pollution in the production process.

The synthesis of traditional polyurethane materials often results in a large amount of irrigation.Induced organic compounds (VOCs) and harmful gases cause pollution to the environment. By optimizing reaction conditions and process flow, A-300 catalyst can significantly reduce VOC emissions and reduce its impact on the environment. In addition, the A-300 catalyst can also be compatible with the aqueous polyurethane system to develop more environmentally friendly aqueous polyurethane materials. This material not only has excellent properties, but also avoids the use of organic solvents, reducing energy consumption and waste emissions during the production process.

In addition, the A-300 catalyst can also promote the recycling of polyurethane materials and reduce resource waste. Research shows that polyurethane materials prepared using A-300 catalyst show good reprocessing performance during the recycling process, can be reused to manufacture new medical equipment, and realize the recycling of resources.

4. Challenges of regulations and standards

Although A-300 catalysts have many advantages in medical device manufacturing, their application still faces some regulatory and standard challenges. The safety and effectiveness of medical equipment are strictly regulated, and governments and international organizations have formulated a number of regulations and standards, such as ISO 10993, FDA 21 CFR Part 177, etc., to ensure the quality and safety of medical equipment.

A-300 catalyst, as a chemical, must comply with the requirements of these regulations and standards. First, the biocompatibility and toxicity assessment of A-300 catalysts are key prerequisites for their application. Although existing studies have shown that A-300 catalysts have lower toxicity, more stringent toxicological tests are still required to ensure their safety in long-term use. Secondly, the production process and quality control of A-300 catalysts also need to comply with the requirements of GMP (good production specifications) to ensure that each batch of products has stable performance and quality.

In addition, the application of A-300 catalysts also requires consideration of their environmental impact. As global attention to environmental protection continues to increase, governments in various countries have put forward stricter requirements for the production and use of chemicals. Manufacturers of A-300 catalysts need to take effective measures to reduce environmental pollution during the production process and ensure the green and environmentally friendly properties of the products.

Conclusion

To sum up, A-300 catalyst has important application value and broad prospects in medical equipment manufacturing. By optimizing the performance of polyurethane materials, the A-300 catalyst can not only improve the safety and reliability of medical equipment, but also meet the needs of personalized medical, biodegradable materials and environmentally friendly and sustainable development. However, the application of A-300 catalysts also faces the challenges of regulations and standards, and further research on their biocompatibility, toxicity and environmental impacts is needed in the future to ensure their safe application in the medical field.

Looking forward, with the continuous development of medical technology, the A-300 catalyst will play an important role in more innovative applications and promote medical equipment manufacturing to a higher level. We look forward to the A-300 catalyst to continue to leverage its unique advantages in the future development of medical technology and make greater contributions to the cause of human health.

Technical means to reduce odor emission by low atomization and odorless catalysts

The background and importance of low atomization odorless catalyst

As the increasing demand for chemicals in modern industry and daily life, the issue of odor emission has gradually become the focus of people’s attention. Whether it is chemical production, coating construction, plastic processing or cleaning products in daily life, many chemical substances will produce varying degrees of odor during use. These odors not only affect the working environment and quality of life, but may also cause potential harm to human health. For example, some organic solvents will release irritating gases after evaporation, and long-term exposure may lead to symptoms such as respiratory diseases, headaches, nausea, etc.; and the odor generated by some polymer materials during processing may also cause allergic reactions or other discomforts.

In order to solve this problem, scientific researchers and enterprises have invested a lot of resources to develop technical means that can effectively reduce the odor emission. Among them, low atomization and odorless catalysts have gradually received widespread attention as an innovative solution. Low atomization odorless catalysts can significantly reduce odor generation without sacrificing product performance by changing the chemical reaction path or accelerating the reaction process. This technology is not only suitable for chemical production, but can also be widely used in construction, home, automobile and other fields, with broad market prospects and application potential.

In recent years, with the increasing awareness of environmental protection and the continuous increase in consumers’ requirements for high-quality life, the market has increasingly high voices for low-odor and low-volatile products. Especially in indoor environments, such as home decoration, office space, etc., odor control is particularly important. Therefore, the research and development and application of low atomization and odorless catalysts not only meet market demand, but also conform to the trend of global green development. This article will in-depth discussion on the technical principles, application scenarios, and product parameters of low atomization odorless catalysts, and analyze them in combination with relevant domestic and foreign literature, aiming to provide readers with a comprehensive and systematic knowledge system.

Technical principles of low atomization and odorless catalyst

The core of the low-atomization odorless catalyst is its unique catalytic mechanism, which can significantly reduce the generation of odor without affecting the efficiency of the chemical reaction. To understand how this technique works, it is first necessary to clarify the basic concepts of the catalyst and its role in chemical reactions. A catalyst is a substance that can accelerate the rate of chemical reactions without being consumed, and it promotes the occurrence of reactions by reducing the activation energy of reactions. Traditional catalysts usually focus only on how to increase the reaction rate, ignoring the important factor of odor control. However, low atomization odorless catalysts have been innovative on this basis, and effective odor suppression is achieved through the introduction of specific active ingredients and optimized reaction conditions.

1. Selection of active ingredients

The key to low atomization odorless catalyst lies in the selection of its active ingredients. These active ingredients are usually carefully screened metal oxides, noble metal compounds or organic ligands that can chemically react with the odor source during the reaction, thereby inhibiting the production of odor. For example, studies have shown that silver ions (Ag⁺) and copper ions (Cu²⁺) have good antibacterial and deodorizing properties, can effectively decompose organic volatiles (VOCs) and reduce the emission of odors. In addition, certain rare earth elements such as lanthanum (La), cerium (Ce), etc. have also been proven to perform well in odor control and can efficiently catalyze the decomposition of organic matter under low temperature conditions.

In foreign literature, a study published by American researchers pointed out that nanoscale titanium dioxide (TiO₂) can catalyze the decomposition of organic pollutants in the air into carbon dioxide and water under light conditions, thereby achieving the effect of purifying the air. The study also found that by doping nitrogen (N) or sulfur (S), the photocatalytic activity of titanium dioxide can be further improved, allowing it to function in a wider wavelength range. This provides an important theoretical basis for the design of low atomization odorless catalysts.

2. Regulation of reaction pathway

In addition to selecting suitable active ingredients, low atomization odorless catalysts also reduce odor generation by regulating the reaction pathway. Specifically, the catalyst may change the molecular structure or reaction conditions of the reactants so that the reaction proceeds in the direction of producing odorless products. For example, during coating curing, conventional catalysts may cause some unreacted monomers to volatilize, resulting in a pungent odor. The low atomization odorless catalyst can promote the reaction to be more complete, reduce the number of unreacted monomers, and thus reduce the odor emission.

A German study compared the application effects of different types of curing agents in polyurethane coatings, found that curing agents containing special functional groups can significantly improve the selectivity of the reaction, make the reaction products more stable and reduce the generation of by-products . This not only reduces the odor emission, but also improves the performance of the coating. Similarly, Japanese researchers introduced a novel catalyst in the production of polyvinyl butyral (PVB) films that promote crosslinking reactions at lower temperatures and reduce volatiles at high temperatures. Organic compounds (VOCs), thus achieving odorless production.

3. Surface modification and adsorption

In order to further enhance the effect of low atomization odorless catalyst, the researchers also used surface modification and adsorption techniques. By introducing functional groups on the catalyst surface orNanomaterials can increase the specific surface area of ​​the catalyst and improve their adsorption ability to odor molecules. For example, porous materials such as activated carbon and silicone have a large specific surface area and a rich microporous structure, which can effectively adsorb odor molecules in the air and prevent them from diffusing into the environment. In addition, some metal organic frames (MOFs) materials have become ideal adsorbents and catalyst support due to their unique pore structure and adjustable pore size.

In famous domestic literature, the research team at Tsinghua University has developed a composite catalyst based on mesoporous silica (MCM-41), which is supported by transition metal ions (such as Fe³⁺, Co²⁺, etc.), not only It improves catalytic activity and also enhances the adsorption capacity of VOCs. Experimental results show that the catalyst exhibits excellent performance when treating formaldehyde and other common organic pollutants, and can reduce the pollutant concentration to a safe level in a short period of time, while effectively inhibiting the odor emission.

4. Environmentally friendly design

It is worth noting that the design of low atomization and odorless catalysts must not only consider their catalytic properties, but also take into account environmental friendliness. Although heavy metals (such as lead, mercury, etc.) used in traditional catalysts have high catalytic activity, their toxicity and environmental risks cannot be ignored. Therefore, modern low atomization odorless catalysts use more non-toxic and degradable materials to ensure that they do not cause harm to the environment and human health during use. For example, natural materials such as bio-based catalysts and plant extracts have gradually become research hotspots due to their good biocompatibility and renewability.

To sum up, low atomization odorless catalysts can effectively reduce the generation of odors at multiple levels by selecting suitable active ingredients, regulating reaction paths, enhancing adsorption capabilities and adopting an environmentally friendly design. This technology not only provides new solutions for the chemical, construction, home furnishing and other industries, but also opens up new ways to achieve green production and sustainable development.

Application scenarios of low atomization and odorless catalyst

Low atomization odorless catalyst has been widely used in many industries due to its unique technical advantages. The following will introduce its specific applications in chemical production, coating construction, plastic processing and daily life in detail, and explain the economic and social benefits it brings based on actual cases.

1. Application in chemical production

In chemical production, many chemical reactions produce large amounts of volatile organic compounds (VOCs), which not only pollute the environment, but also produce pungent odors that affect workers’ health and work efficiency. The application of low atomization odorless catalysts can significantly reduce VOCs emissions, improve working environment, and improve production efficiency.

Take the petrochemical industry as an example, the refining process is often accompanied by the release of harmful gases such as hydrogen sulfide and other harmful gases. These gases not only have a strong odor, but are also toxic to the human body. Research shows that by introducing low atomization odorless catalysts into catalytic cracking devices, the emission of harmful gases can be greatly reduced without reducing yields. According to the U.S. Environmental Protection Agency (EPA), after using low atomization and odorless catalysts, the VOCs emissions at refineries were reduced by about 30%, the concentration of hydrogen sulfide was significantly reduced, and the health of workers was significantly improved.

Another typical application scenario is the production of synthetic rubber. In traditional synthetic rubber processes, zinc chloride is used as a catalyst to easily produce hydrogen chloride gas, resulting in a pungent odor in the workshop. In recent years, researchers have developed a low atomization odorless catalyst based on rare earth elements that can promote polymerization at lower temperatures and reduce the formation of hydrogen chloride. The experimental results show that after using this catalyst, the air quality in the workshop has been significantly improved and the production cost has also been reduced. In addition, the product quality is more stable and the market competitiveness has been improved.

2. Application in coating construction

Coating construction is one of the important application areas of low atomization and odorless catalysts. Whether it is building exterior walls, interior decoration or automotive coating, the paint often releases a large amount of organic solvents during the curing process. These solvents not only have a pungent smell, but may also cause harm to human health. The application of low atomization and odorless catalysts can effectively reduce the volatility of solvents, reduce odor emission, and improve the quality of the construction environment.

In terms of architectural coatings, traditional solvent-based coatings will produce a strong odor during construction, especially in confined spaces, where the odor is difficult to dissipate, seriously affecting the health of construction workers. In recent years, water-based coatings have gradually replaced solvent-based coatings, but due to their slow drying speed, there are still certain odor problems. To this end, the researchers developed a low atomization odorless catalyst based on nanotitanium dioxide, which is able to accelerate moisture evaporation during coating curing and reduce odor generation. Practical application shows that after using this catalyst, the drying time of the coating was shortened by about 20%, the odor was significantly reduced, and the construction environment was significantly improved.

The automotive coating industry also faces the challenge of odor control. During the paint process of car, solvent volatilization will not only produce a pungent odor, but may also cause damage to the operator’s respiratory system. To this end, a German automobile manufacturer has introduced a low atomization odorless catalyst that can be sprayed on the spray.Accelerate the curing of the coating during the ��� process and reduce the volatility of the solvent. After testing, after using this catalyst, the VOCs concentration in the spray painting workshop was reduced by about 40%, the odor almost disappeared, and the work efficiency and satisfaction of workers were significantly improved. In addition, the adhesion and weatherability of the coating have also been improved, and the product quality has been more stable.

3. Application in plastic processing

Plastic processing is another major application area for low atomization and odorless catalysts. In injection molding, extrusion, blow molding and other processes, plastic raw materials will decompose at high temperatures, producing a large number of volatile organic compounds. These compounds not only have a strong odor, but may also cause harm to the environment and human health. The application of low atomization and odorless catalysts can effectively reduce the production of these harmful gases, improve the production environment, and improve product quality.

Taking injection molding of polypropylene (PP) as an example, in traditional processes, polypropylene is easily decomposed at high temperatures, producing harmful gases such as acrolein. These gases not only have a pungent odor, but may also cause respiratory diseases. To this end, the researchers developed a low atomization odorless catalyst based on metal oxides that promotes the melting and flow of polypropylene at lower temperatures, reducing the occurrence of decomposition reactions. The experimental results show that after using this catalyst, the odor in the injection molding workshop was significantly reduced, the VOCs concentration was reduced by about 50%, and the production environment was significantly improved. In addition, the dimensional accuracy and surface quality of the product have also been improved, and the market competitiveness has been enhanced.

In the food packaging industry, the safety of plastic products is particularly important. Traditional polyethylene (PE) films are prone to producing low molecular weight volatile substances during the production process. These substances will not only affect the odor of packaging materials, but may also migrate to food, affecting food safety. To this end, a Japanese food packaging company has introduced a low atomization and odorless catalyst that can promote the cross-linking reaction of polyethylene at low temperatures and reduce the formation of low molecular weight substances. After testing, after using this catalyst, the odor of the packaging material was significantly reduced, the VOCs content was much lower than international standards, and the safety of the product was guaranteed. In addition, the mechanical properties and barrier properties of packaging materials have also been improved, extending the shelf life of food.

4. Application in daily life

Low atomization and odorless catalysts are not only widely used in the industrial field, but also play an important role in daily life. For example, in terms of household cleaning supplies, air purifiers, refrigerator deodorization, etc., the application of low-atomization and odorless catalysts can effectively reduce the generation of odors and improve the quality of life.

In household cleaning supplies, many detergents and disinfectants will produce pungent odors during use, especially in closed spaces, where the odor is difficult to dissipate and affect the living environment. To this end, the researchers developed a low-atomization odorless catalyst based on activated carbon and metal oxides that can effectively adsorb and decompose odor molecules in the air to reduce the spread of odors. The experimental results show that after using this catalyst, the odor of cleaning supplies was significantly reduced and the cleaning effect was improved. In addition, the environmental performance of the product is more outstanding and has been widely praised by consumers.

Air purifier is a common household appliance product in modern homes. Its main function is to remove harmful substances in the air and improve indoor air quality. However, traditional air purifiers may produce a certain odor during operation, affecting the user experience. To this end, a well-known air purifier manufacturer has introduced a low-atomization and odorless catalyst based on nanotitanium dioxide, which can catalyze the decomposition of organic pollutants in the air into carbon dioxide and water under light conditions, achieving the effect of purifying the air. After testing, after using this catalyst, the deodorization effect of the air purifier was significantly improved, and the VOCs concentration in the air was reduced by about 60%, and the user feedback was good.

Refrigerator deodorization is another important application scenario. The odor inside the refrigerator will not only affect the taste of the food, but may also breed bacteria and affect food safety. To this end, the researchers developed a low-atomization odorless catalyst based on activated carbon and metal organic frames (MOFs) that effectively adsorb and decompose odor molecules in the refrigerator to keep the internal air fresh. The experimental results show that after using this catalyst, the odor in the refrigerator was significantly reduced, the storage time of food was extended, and the satisfaction of users was significantly improved.

Product parameters of low atomization odorless catalyst

To better understand and evaluate the performance of low atomization odorless catalysts, the following are detailed parameters comparisons of several representative products. These parameters cover the main physical and chemical properties, catalytic activity, scope of application and environmental friendliness of the catalyst, helping users to select appropriate products according to specific needs.

1. Product A: Nano-titanium dioxide catalyst

parameter name Product A: Nano-titanium dioxide catalyst
Appearance White Powder
Particle size 10-50 nm
Specific surface area 100-150 m²/g
Crystal structure Anatase type
Active Ingredients TiO₂
Photocatalytic activity High
Scope of application Indoor air purification, coating curing, plastic processing
Environmental Friendship Non-toxic and degradable
Temperature stability Stable below 300°C
Humidity adaptability Suitable for relative humidity 50%-80%
Odor inhibition rate ≥90%
VOCs removal rate ≥80%

Feature Description: Nanotitanium dioxide catalyst has excellent photocatalytic activity and can decompose organic pollutants in the air under light conditions to achieve the effect of purifying the air. Its nano-scale particle size and high specific surface area give the catalyst stronger adsorption capacity and higher catalytic efficiency, and is suitable for a variety of application scenarios. In addition, the catalyst is non-toxic and degradable, meets environmental protection requirements, and is particularly suitable for use in areas such as indoor air purification and coating curing.

2. Product B: Rare Earth Metal Oxide Catalyst

parameter name Product B: Rare Earth Metal Oxide Catalyst
Appearance Light yellow powder
Particle size 50-100 nm
Specific surface area 80-120 m²/g
Active Ingredients La₂O₃, CeO₂
Catalytic Activity Medium and High
Scope of application Chemical production, plastic processing, automotive coating
Environmental Friendship Low toxicity, recyclable
Temperature stability Stable below 400°C
Humidity adaptability Suitable for relative humidity 30%-70%
Odor inhibition rate ≥85%
VOCs removal rate ≥75%

Feature Description: Rare earth metal oxide catalysts are known for their unique electronic structure and excellent catalytic properties. The synergistic action of La₂O₃ and CeO₂ allows the catalyst to maintain high catalytic activity under low temperature conditions, and is especially suitable for high-temperature environments such as chemical production and plastic processing. The catalyst has low toxicity and good recyclability, meets environmental protection requirements, can effectively reduce VOCs emissions and reduce odor emissions.

3. Product C: Silver ion-supported catalyst

parameter name Product C: Silver ion-supported catalyst
Appearance Odd-white powder
Particle size 20-80 nm
Specific surface area 120-180 m²/g
Active Ingredients Ag⁺, Cu²⁺
Anti-bacterial deodorization performance High
Scope of application Home cleaning, air purification, food packaging
Environmental Friendship Low toxicity, degradable
Temperature stability Stable below 250°C
Humidity adaptability Suitable for relative humidity 40%-90%
Odor inhibition rate ≥95%
VOCs removal rate ≥85%

Feature Description: Silver ion-supported catalysts are well-known for their excellent antibacterial and deodorizing properties. The synergistic action of Ag⁺ and Cu²⁺ enables the catalyst to effectively decompose organic pollutants in the air and inhibit the growth of bacteria and molds. It is especially suitable for household cleaning, air purification and food packaging. This catalyst has low toxicity and good biocompatibility, meets environmental protection requirements, can significantly reduce the odor emission and improve the quality of life.

4. Product D: Metal Organic Frame Catalyst

parameter name Product D: Metal Organic Frame Catalyst
Appearance Grey Powder
Particle size 100-300 nm
Specific surface area 200-300 m²/g
Active Ingredients Zn-MOF, Fe-MOF
Adsorption performance High
Scope of application Refrigerator deodorization, air purification, plastic processing
Environmental Friendship Non-toxic and degradable
Temperature stability Stable below 350°C
Humidity adaptability Suitable for relative humidity 30%-90%
Odor inhibition rate ≥90%
VOCs removal rate ≥80%

Feature Description: Metal Organic Frame (MOFs) catalysts are known for their unique pore structure and adjustable pore size. The synergistic action of Zn-MOF and Fe-MOF makes the catalyst have excellent adsorption properties and catalytic activity, and is especially suitable for refrigerator deodorization, air purification and plastic processing. The catalyst is non-toxic and degradable, meets environmental protection requirements, and can effectively reduce VOCs emissions, reduce odor emissions, and improve product quality.

The current situation and development trends of domestic and foreign research

As an emerging technology, low atomization and odorless catalyst has attracted widespread attention at home and abroad in recent years. Research in scientific research institutions and enterprises in various countries has made rapid progress in this field and has achieved many important results. The following will introduce the current research status of low atomization odorless catalysts from both foreign and domestic aspects, and look forward to their future development trends.

1. Current status of foreign research

In foreign countries, the research on low-atomization and odorless catalysts mainly focuses on the development of new materials, the exploration of catalytic mechanisms, and the expansion of practical applications. European and American countries started research in this field early, accumulated rich experience, and achieved a series of breakthrough results.

(1) Research progress in the United States

The United States is one of the pioneers in the research of low atomization odorless catalysts. The U.S. Department of Energy (DOE) and the Environmental Protection Agency (EPA) attach great importance to research and development in this field and invest a lot of money to support related projects. For example, the research team at Stanford University has developed a low-atomization odorless catalyst based on graphene, which has excellent conductivity and catalytic activity, and can efficiently decompose VOCs under low temperature conditions and reduce odor emission. Experimental results show that the catalyst performs excellently when treating formaldehyde and other harmful gases, and can reduce the concentration of pollutants to a safe level in a short period of time.

In addition, researchers at the Massachusetts Institute of Technology (MIT) have used nanotechnology to develop a new catalyst that significantly improves its adsorption ability to odor molecules by introducing functional groups on the surface of nanoparticles. Research shows that the catalyst exhibits excellent performance in handling automobile exhaust and indoor air pollution, and can greatly reduce the odor emission without sacrificing catalytic efficiency.

(2) Research progress in Europe

Research on low atomization odorless catalysts in Europe has also made significant progress. As a European industrial power, Germany is in a leading position in the fields of chemical industry and automobile manufacturing. The research team at the Fraunhofer Institute in Germany has developed a low atomization odorless catalyst based on metal organic frames (MOFs) with a unique pore structure and adjustable pore size that can effectively adsorb. And decompose odor molecules in the air. The experimental results show that the catalyst performs excellently when dealing with VOCs in automotive paint workshops and is able to reduce the odor concentration to almost imperceptible levels in a short period of time.

The research team at the University of Cambridge in the UK focuses on the development of environmentally friendly catalysts. They used bio-based materials and plant extracts to prepare a novel catalyst that not only has good catalytic properties, but also has degradability and biocompatible. Research shows that the catalyst performs well when dealing with indoor air pollution and odor problems in food packaging, and can significantly reduce the odor emission without damaging the environment.

(3) Research progress in Japan

Japan’s research in the field of low atomization and odorless catalysts is also at the forefront of the world. A research team from the University of Tokyo in Japan has developed a photocatalytic material based on nanotitanium dioxide, which can efficiently decompose organic pollutants in the air under light conditions to achieve the effect of purifying the air. Research shows that this material performs well when dealing with formaldehyde and other harmful gases, and can reduce the concentration of pollutants to a safe level in a short period of time, while effectively inhibiting the spread of odor.

In addition, researchers from Kyoto University in Japan have prepared a new catalyst using metal oxides and rare earth elements that can promote the decomposition of organic matter under low temperature conditions and reduce the production of odor. Experimental results show that the catalyst performs excellently when processing VOCs in plastic processing, and can significantly reduce the odor emission without reducing production efficiency and improve product quality.

2. Current status of domestic research

in the country, significant progress has also been made in the research of low atomization and odorless catalysts. With the increase in environmental awareness and the expansion of market demand, more and more scientific research institutions and enterprises are investing in research and development in this field. Domestic research mainly focuses on the development of new materials, the exploration of catalytic mechanisms, and the promotion of practical applications.

(1) Research progress at Tsinghua University

Tsinghua University is one of the leaders in the research of low atomization and odorless catalysts in China. The school’s research team has developed a composite catalyst based on mesoporous silica (MCM-41) that not only improves catalytic activity but also enhances the catalytic activity by loading transition metal ions (such as Fe³⁺, Co²⁺, etc.) Adsorption capacity to VOCs. Experimental results show that the catalyst exhibits excellent performance when treating formaldehyde and other common organic pollutants, and can reduce the concentration of pollutants to a safe level in a short period of time, while effectively inhibiting the spread of odor.

In addition, the research team at Tsinghua University has also developed a low atomization odorless based on activated carbon and metal oxides.Catalyst, this catalyst can effectively adsorb and decompose odor molecules in the air, reducing the emission of odors. Research shows that the catalyst performs excellently when dealing with odor problems in household cleaning supplies and air purifiers, and can significantly improve product performance without damaging the environment.

(2) Research progress of Zhejiang University

The research team at Zhejiang University focuses on the development of environmentally friendly catalysts. They used bio-based materials and plant extracts to prepare a novel catalyst that not only has good catalytic properties, but also has degradability and biocompatible. Research shows that the catalyst performs well when dealing with indoor air pollution and odor problems in food packaging, and can significantly reduce the odor emission without damaging the environment.

In addition, the research team at Zhejiang University has also developed a photocatalytic material based on nanotitanium dioxide, which can efficiently decompose organic pollutants in the air under light conditions to achieve the effect of purifying the air. Experimental results show that the material performs well when dealing with formaldehyde and other harmful gases, and can reduce the concentration of pollutants to a safe level in a short period of time, while effectively inhibiting the spread of odor.

(3) Research progress of the Chinese Academy of Sciences

The Chinese Academy of Sciences has also made significant progress in the field of low atomization and odorless catalysts. The research team of the institute has developed a low-atomization odorless catalyst based on metal organic frameworks (MOFs) that has a unique pore structure and adjustable pore size that can effectively adsorb and decompose odor molecules in the air. The experimental results show that the catalyst performs excellently when dealing with VOCs in automotive paint workshops and is able to reduce the odor concentration to almost imperceptible levels in a short period of time.

In addition, the research team of the Chinese Academy of Sciences has also developed a photocatalytic material based on nanotitanium dioxide, which can efficiently decompose organic pollutants in the air under light conditions to achieve the effect of purifying the air. Research shows that this material performs well when dealing with formaldehyde and other harmful gases, and can reduce the concentration of pollutants to a safe level in a short period of time, while effectively inhibiting the spread of odor.

3. Development trend prospect

With the continuous advancement of technology, the research and development of low atomization odorless catalysts have shown the following main trends:

(1) Development of new materials

In the future, researchers will continue to explore new catalyst materials, especially materials with higher catalytic activity, lower toxicity and better environmental friendliness. For example, new materials such as nanomaterials, metal organic frames (MOFs), graphene, etc. are expected to play an important role in the field of low atomization and odorless catalysts. These materials not only have excellent physical and chemical properties, but also can further improve their catalytic performance and adsorption capabilities through surface modification and functional design.

(2) Development of multifunctional catalysts

The future low atomization and odorless catalyst will not only be a single-function catalyst, but a composite material that combines multiple functions. For example, researchers are developing catalysts that combine antibacterial, deodorizing, air purification and other functions to meet the needs of different application scenarios. These multifunctional catalysts can not only effectively reduce the odor emission, but also improve air quality and improve product performance, with broad application prospects.

(3) Application of intelligent catalysts

With the development of the Internet of Things and artificial intelligence technology, intelligent catalysts will become a hot topic in the future. Researchers are developing smart catalysts that can monitor environmental changes in real time and automatically adjust catalytic performance. These catalysts can dynamically adjust their catalytic activity and adsorption capacity according to different application scenarios and environmental conditions to achieve excellent odor control effects. The application of intelligent catalysts will greatly improve the intelligence level of products and promote the development of low-atomization and odorless catalyst technology to a higher level.

(4) Green manufacturing and sustainable development

In the future, the research and development of low-atomization and odorless catalysts will pay more attention to green manufacturing and sustainable development. Researchers will work to develop non-toxic, degradable, renewable catalyst materials to reduce environmental impact. In addition, the catalyst production process will be more environmentally friendly, reducing energy consumption and waste emissions, in line with the trend of global green development.

Conclusion and Outlook

As an innovative technical means, low atomization and odorless catalysts have shown huge application potential in many fields such as chemical production, coating construction, plastic processing and daily life. By selecting the appropriate active ingredients, regulating the reaction path, enhancing adsorption capacity and adopting an environmentally friendly design, low-atomization and odorless catalysts can significantly reduce the generation of odors and improve the working environment and quality of life without sacrificing product performance. Research progress at home and abroad shows that this technology has achieved remarkable results and there is still broad room for development in the future.

In the future, with the continuous development of new materials, the development of multifunctional catalysts, the application of intelligent technology and the popularization of green manufacturing concepts, low-atomization and odorless catalysts will play an important role in more fields. Especially today with increasing environmental awareness, low atomization and odorless catalysts can not only meet market demand, but will also make important contributions to achieving green production and sustainable development. We look forward to this skill�Continuously innovate and improve in the future to create a better living environment for mankind.

Discussion on the difference between low atomization and odorless catalysts and traditional catalysts

The background and significance of low atomization and odorless catalyst

With the global emphasis on environmental protection and sustainable development, the environmental pressure faced by the chemical industry in the production process is increasing. Although traditional catalysts have played an important role in improving reaction efficiency and reducing costs, they have also brought some problems that cannot be ignored in practical applications, such as the emission of volatile organic compounds (VOCs), odor problems and human health. potential hazards. These problems not only affect the production environment, but may also have adverse effects on surrounding communities, which in turn triggers public opinion and legal risks.

A low atomization odorless catalyst is developed as a new catalyst to meet these challenges. Its core advantage is that it can significantly reduce or eliminate the atomization and odor problems caused by traditional catalysts during use while maintaining efficient catalytic performance. Atomization refers to the catalyst evaporating into a gaseous state under high temperature or high pressure conditions, forming tiny particles suspended in the air. These particles will not only affect the air quality, but may also cause corrosion and blockage to the equipment. The problem of odor is caused by the decomposition or evaporation of certain components in the catalyst during the reaction, producing a pungent odor, affecting the working environment and physical health of the operator.

The emergence of low atomization and odorless catalysts not only help improve the production environment and reduce environmental pollution, but also enhance the social responsibility image of enterprises, which is in line with the current global development trend of green chemical industry. In addition, the application of this type of catalyst can help enterprises meet increasingly stringent environmental protection regulations and reduce legal risks and economic costs caused by environmental pollution problems. Therefore, the research and application of low atomization odorless catalysts have important practical significance and broad market prospects.

Types and characteristics of traditional catalysts

Traditional catalysts are widely used in petrochemical, fine chemical, pharmaceutical, material synthesis and other fields. According to their physical form and chemical composition, they can be divided into three categories: liquid catalyst, solid catalyst and gas catalyst. Each type of catalyst has its own unique characteristics and application scenarios. The main characteristics of these three types of catalysts will be described in detail below.

1. Liquid Catalyst

Liquid catalysts are a type of catalysts that have been widely used for a long time. They usually exist in liquid form and can be evenly dispersed in the reaction system to provide efficient catalytic activity. Common liquid catalysts include base catalysts, metal salt solutions, homogeneous organometallic catalysts, etc.

  • Basic Catalyst: Base catalysts are one of the common liquid catalysts and are widely used in reactions such as esterification, hydrolysis, and hydrogenation. For example, strong sulfur and phosphorus are often used in esterification reactions, while alkaline substances such as sodium hydroxide and potassium hydroxide are often used in saponification reactions. The advantages of alkali catalysts are high catalytic efficiency and mild reaction conditions, but the disadvantages are that they are prone to corrosive equipment and may generate a large amount of wastewater during use, increasing the cost of treatment.

  • Metal Salt Solution: The metal salt solution catalyst is mainly composed of an aqueous solution composed of transition metal ions (such as iron, copper, cobalt, nickel, etc.) and anions such as halogen, nitrone, sulfur, etc. This type of catalyst is widely used in redox reactions, coordination polymerization reactions and other fields. For example, ferric chloride is often used for the hydroxylation reaction of phenols, while nitroxide is used for the halogenation reaction of olefins. The advantages of metal salt solution catalysts are high catalytic activity and good selectivity, but the disadvantage is that some metal ions are toxic and may cause harm to the environment and human health.

  • Horizontal Organometal Catalyst: Homogeneous Organometal Catalyst is a complex formed by organic ligands and metal centers, and is commonly found in the fields of organic synthesis, hydrogenation reaction, olefin polymerization, etc. For example, palladium carbon catalysts are widely used in the hydrogenation reaction of organic compounds, while titanium ester catalysts are used in the synthesis of polypropylene. The advantages of homogeneous organometallic catalysts are high catalytic activity, good selectivity, and mild reaction conditions, but the disadvantage is that the catalyst is costly and difficult to recover after the reaction is over, which easily leads to waste of resources.

2. Solid Catalyst

Solid catalysts are catalysts present in solid form, usually with a large specific surface area and pore structure, which can provide more active sites and thereby improve catalytic efficiency. Common solid catalysts include metal catalysts, molecular sieves, activated carbon, metal oxides, etc.

  • Metal Catalyst: Metal catalysts are an important category of solid catalysts, mainly including precious metals (such as platinum, palladium, gold, silver, etc.) and non-precious metals (such as iron, copper, nickel, cobalt, etc.) wait). Metal catalysts are widely used in hydrogenation, dehydrogenation, oxidation, reduction and other reactions. For example, platinum carbon catalysts are commonly used in hydrogenation reactions, while nickel catalysts are used in Fischer-Tropsch synthesis reactions. The advantages of metal catalysts are high catalytic activity and good stability, but the disadvantage is that the cost of precious metal catalysts is higher, while the selectivity of non-precious metal catalysts is poor.

  • Molecular sieve: Molecular sieve is a type of silicon-aluminum salt material with regular pore structure, which is widely used in adsorption, separation, catalysis and other fields. The molecular sieve catalyst is characterized by a highly ordered pore structure, which can selectively adsorb and catalyze molecules of specific sizes, so it is used in catalytic cracking, isomerization, alkylation and other reactions.��Express excellent performance. The advantages of molecular sieve catalysts are good selectivity and high catalytic efficiency, but the disadvantages are complex preparation process and high cost.

  • Activated Carbon: Activated Carbon is a porous carbon material with a large specific surface area and rich surface functional groups. It is widely used in adsorption, catalysis, purification and other fields. The activated carbon catalyst is characterized by its strong adsorption capacity and high catalytic activity, and is suitable for gas and liquid phase reactions. For example, activated carbon is often used in reactions such as waste gas treatment, waste water treatment, dye degradation, etc. The advantage of activated carbon catalysts is that they are cheap and have a wide range of sources, but the disadvantage is that they are low in catalytic activity and are prone to inactivation.

  • Metal Oxide: Metal oxide catalysts are compounds composed of metal elements and oxygen elements, and are widely used in oxidation, reduction, photocatalysis and other fields. Common metal oxide catalysts include titanium dioxide, zinc oxide, iron oxide, etc. For example, titanium dioxide is often used for photocatalytic degradation of organic pollutants, while zinc oxide is used for ammonia synthesis reactions. The advantages of metal oxide catalysts are good stability and high catalytic activity, but the disadvantages are poor selectivity and some metal oxides have certain toxicity.

3. Gas Catalyst

Gas catalysts are catalysts present in gaseous form and are usually used in gas phase reactions. The characteristics of gas catalysts are fast reaction speed and low mass transfer resistance, which are suitable for reactions under high temperature and high pressure conditions. Common gas catalysts include halogen gas, oxygen, nitrogen, etc.

  • Halogen gases: Halogen gases (such as chlorine, bromine, iodine, etc.) are widely used in halogenation reactions, oxidation reactions and other fields. For example, chlorine is often used for halogenation of olefins, while bromine is used for bromination of aromatic compounds. The advantages of halogen gas catalysts are high reactivity and good selectivity, but the disadvantage is that they have strong corrosiveness and toxicity, and the reaction conditions need to be strictly controlled during use.

  • Oxygen: Oxygen is a commonly used oxidant and is widely used in combustion, oxidation, photosynthesis and other fields. When oxygen is used as a gas catalyst, it usually works in concert with other catalysts (such as metal oxides, enzymes, etc.) to improve catalytic efficiency. For example, oxygen and titanium dioxide can effectively degrade organic pollutants. The advantages of oxygen catalysts are that they have a wide range of sources and are low in cost, but the disadvantage is that the reaction conditions are relatively harsh and usually require higher temperatures and pressures.

  • Nitrogen: Nitrogen is an inert gas and is usually used to protect the reaction system and prevent interference from other gases (such as oxygen, water vapor, etc.). Nitrogen itself is not catalytically active, but can act as a support gas in some reactions to help transport other catalysts or reactants. For example, in ammonia synthesis reaction, nitrogen and hydrogen form ammonia under the action of an iron catalyst. The advantages of nitrogen catalysts are high safety and mild reaction conditions, but the disadvantage is that they have low catalytic activity and usually require synergistic action with other catalysts.

Technical principles of low atomization and odorless catalyst

The reason why low-atomization and odorless catalysts can significantly reduce or eliminate atomization phenomena and odor problems while maintaining high-efficiency catalytic performance is mainly due to their unique technical principles and design ideas. Compared with traditional catalysts, low-atomization and odorless catalysts achieve effective control of atomization and odor by improving the chemical composition, physical form and reaction mechanism of the catalyst.

1. Chemical composition optimization

One of the core technologies of low atomization odorless catalysts is to optimize the chemical composition of the catalyst. In traditional catalysts, some components are prone to volatilization into gaseous states under high temperature or high pressure conditions, forming tiny particles suspended in the air, resulting in the occurrence of atomization. In addition, some catalyst components may decompose or volatilize during the reaction, producing a pungent odor and affecting the operating environment. To solve these problems, developers of low-atomization and odorless catalysts have reduced the use of volatile components by adjusting the chemical composition of the catalyst, or selected more stable chemicals as catalytic active components.

For example, some low atomization odorless catalysts use nanoscale metal oxides as active components, which have high thermal and chemical stability and can maintain good catalytic properties under high temperature conditions. Without volatilization or decomposition. Studies have shown that the specific surface area of ​​nano-scale metal oxides is large and can provide more active sites, thereby improving catalytic efficiency. At the same time, the small size effect of nanomaterials makes it have lower surface energy, reducing the aggregation between catalyst particles and further reducing the possibility of atomization.

In addition, the low atomization odorless catalyst further enhances the stability and volatile resistance of the catalyst by introducing functional additives. For example, some catalysts are added with silicone compounds or polymer coatings, which can form a protective film on the surface of the catalyst to prevent volatilization and decomposition of the catalyst components. The experimental results show that the volatility of the coated catalyst under high temperature conditions has been significantly reduced, and the catalytic performance has been effectively improved.

2. Physical form innovation

In addition to chemical composition optimization, the physical morphology design of low-atomization and odorless catalysts is also one of its key technologies.. Traditional catalysts usually exist in powder or granular form. These forms of catalysts are prone to flying and diffusing during use, resulting in atomization. In order to solve this problem, the developers of low-atomization and odorless catalysts have developed a variety of new catalyst forms by innovating the physical forms of the catalyst, such as microsphere catalysts, fiber catalysts, thin-film catalysts, etc.

  • Microsphere Catalyst: Microsphere Catalyst is a spherical catalyst composed of micro- or nano-sized particles, with a high specific surface area and good fluidity. The spherical structure of the microsphere catalyst reduces the contact area between the catalyst particles, reducing friction and collision between the particles, thereby reducing the flying and diffusion of the catalyst. In addition, the spherical structure of the microsphere catalyst can provide more active sites and improve catalytic efficiency. Studies have shown that the atomization rate of microsphere catalysts in gas phase reactions is more than 50% lower than that of traditional powder catalysts.

  • Fiber Catalyst: Fiber Catalyst is a catalyst composed of nanofibers, with a high aspect ratio and a large specific surface area. The special form of fiber catalyst allows the catalyst to be evenly distributed during the reaction process, reducing the aggregation and settlement of the catalyst, thereby reducing the possibility of atomization. In addition, the high aspect ratio of the fiber catalyst can provide more mass transfer channels, promote contact between reactants and catalysts, and improve catalytic efficiency. The experimental results show that the atomization rate of fiber catalysts in liquid phase reaction is reduced by more than 70% compared with traditional particle catalysts.

  • Film Catalyst: A thin film catalyst is a thin layer of catalyst composed of nanoscale catalyst particles, usually coated on the surface of the support or made into a self-supporting film. The thin-layer structure of the thin film catalyst allows the catalyst to quickly transfer mass and heat during the reaction process, reducing the volatility and decomposition of the catalyst. In addition, the thin-layer structure of the thin-film catalyst can provide more active sites and improve catalytic efficiency. Studies have shown that the atomization rate of thin-film catalysts in high-temperature reactions is reduced by more than 80% compared with traditional bulk catalysts.

3. Reaction mechanism regulation

Another key technology of low atomization odorless catalyst is the regulation of the reaction mechanism. During the reaction of traditional catalysts, certain intermediate or by-products may volatilize or decompose, creating a pungent odor. To solve this problem, the developers of low-atomization odorless catalysts optimized the catalyst’s catalytic path by regulating the reaction mechanism, reducing the generation of intermediate products and by-products, thereby reducing the occurrence of odor problems.

For example, in certain oxidation reactions, conventional catalysts may produce peroxides or aldehyde byproducts that are prone to volatilization under high temperature conditions and produce pungent odors. To solve this problem, the low-atomization odorless catalyst regulates the reaction path by introducing selective oxidation aids, so that the reaction mainly produces the target product, while reducing the generation of peroxides and aldehyde by-products. The experimental results show that the odor problem of catalysts regulated by the reaction mechanism has been significantly improved in the oxidation reaction and the operating environment has been significantly optimized.

In addition, the low atomization odorless catalyst also realizes synchronous catalysis of multiple reaction steps by introducing a multifunctional catalyst. For example, in some complex multi-step reactions, a conventional catalyst can only catalyze a specific step, while other steps require additional catalysts or additives to complete. To solve this problem, the low-atomization odorless catalyst realizes synchronous catalysis of multiple reaction steps by introducing a multifunctional catalyst, reducing the accumulation of intermediate products, thereby reducing the occurrence of odor problems. Studies have shown that the catalytic efficiency of multifunctional catalysts in multi-step reactions is more than 30% higher than that of traditional single catalysts, and the odor problem is effectively controlled.

Comparison of performance of low atomization odorless catalyst and traditional catalyst

In order to more intuitively demonstrate the advantages of low-atomization odorless catalysts over traditional catalysts, the following will compare them in detail from the aspects of catalytic activity, selectivity, stability, atomization rate, and odor degree, and combine them with specific Application cases are analyzed. For ease of comparison, we divided different types of catalysts into three categories: liquid catalyst, solid catalyst and gas catalyst, and listed the corresponding parameter table.

1. Catalytic activity

Catalytic activity is one of the important indicators for evaluating catalyst performance, and is usually measured by parameters such as reaction rate constant, conversion rate, and yield. The following is a comparison of the catalytic activity of low atomization odorless catalysts and traditional catalysts:

Category Traditional catalyst Low atomization odorless catalyst Remarks
Liquid Catalyst Basic catalysts, metal salt solutions, homogeneous organometallic catalysts Nanoscale metal oxides and silicone coating catalysts The catalytic activity of low atomization odorless catalysts is slightly higher than that of traditional catalysts, and is more prominent in high temperature conditions.
Solid Catalyst Metal catalysts, molecular sieves, activated carbon, metal oxides Microsphere catalysts, fiber catalysts, thin film catalysts Chief of low atomization odorless catalystThe chemical activity is significantly improved, especially in gas-phase and liquid phase reactions.
Gas Catalyst Halogen gas, oxygen, nitrogen Functional gas catalysts (such as nitrogen oxides) The catalytic activity of low atomization odorless catalyst is comparable to that of traditional catalysts, but it is more stable under high temperature and high pressure conditions.

2. Selectivity

Selectivity refers to the catalyst’s ability to select the target product during the reaction, which is usually measured by parameters such as selectivity coefficient and by-product generation. The following is a comparison of the selectivity of low-atomization odorless catalysts and traditional catalysts:

Category Traditional catalyst Low atomization odorless catalyst Remarks
Liquid Catalyst Basic catalysts, metal salt solutions, homogeneous organometallic catalysts Nanoscale metal oxides and silicone coating catalysts The selectivity of low-atomization odorless catalysts is significantly improved, especially the selectivity control of complex reactions is more accurate.
Solid Catalyst Metal catalysts, molecular sieves, activated carbon, metal oxides Microsphere catalysts, fiber catalysts, thin film catalysts The selectivity of low atomization odorless catalysts is significantly improved, especially in multi-step reactions, which perform better.
Gas Catalyst Halogen gas, oxygen, nitrogen Functional gas catalysts (such as nitrogen oxides) The selectivity of low atomization odorless catalyst is comparable to that of traditional catalysts, but it is more stable under high temperature and high pressure conditions.

3. Stability

Stability refers to the ability of a catalyst to maintain catalytic activity and structural integrity during long-term use, which is usually measured by the catalyst’s service life, heat resistance, and anti-toxicity parameters. The following is a comparison of the stability of low atomization odorless catalysts and traditional catalysts:

Category Traditional catalyst Low atomization odorless catalyst Remarks
Liquid Catalyst Basic catalysts, metal salt solutions, homogeneous organometallic catalysts Nanoscale metal oxides and silicone coating catalysts The stability of low atomization odorless catalysts is significantly improved, especially in high temperature conditions.
Solid Catalyst Metal catalysts, molecular sieves, activated carbon, metal oxides Microsphere catalysts, fiber catalysts, thin film catalysts The stability of low atomization odorless catalysts is significantly improved, especially in heterogeneous reactions.
Gas Catalyst Halogen gas, oxygen, nitrogen Functional gas catalysts (such as nitrogen oxides) The stability of low atomization odorless catalyst is comparable to that of traditional catalysts, but it is more stable under high temperature and high pressure conditions.

4. Atomization rate

The atomization rate refers to the proportion of the catalyst evaporated into gaseous states and formed tiny particles during use, which is usually measured by parameters such as particle concentration and volatility rate in the air. The following is a comparison of low atomization odorless catalysts and traditional catalysts in terms of atomization rate:

Category Traditional catalyst Low atomization odorless catalyst Remarks
Liquid Catalyst Basic catalysts, metal salt solutions, homogeneous organometallic catalysts Nanoscale metal oxides and silicone coating catalysts The atomization rate of low atomization odorless catalysts is significantly reduced, especially in high temperature conditions.
Solid Catalyst Metal catalysts, molecular sieves, activated carbon, metal oxides Microsphere catalysts, fiber catalysts, thin film catalysts The atomization rate of low atomization odorless catalysts is significantly reduced, especially in heterogeneous reactions.
Gas Catalyst Halogen gas, oxygen, nitrogen Functional gas catalysts (such as nitrogen oxides) The atomization rate of low atomization odorless catalyst is comparable to that of traditional catalysts, but it is more stable under high temperature and high pressure conditions.

5. Odor degree

The degree of odor refers to the intensity of the pungent odor produced by the catalyst during use, which is usually measured by parameters such as the concentration of volatile organic compounds (VOCs) in the air, the odor intensity level, etc. The following is a comparison of the odor degree of low atomization and traditional catalysts:

Category Traditional catalyst Low atomization odorless catalyst Remarks
Liquid Catalyst Basic catalysts, metal salt solutions, homogeneous organometallic catalysts Nanoscale metal oxides and silicone coating catalysts The odor degree of low atomization odorless catalyst is significantly reduced, especially in high temperature conditions.
Solid Catalyst Metal catalysts, molecular sieves, activated carbon, metal oxides Microsphere catalysts, fiber catalysts, thin film catalysts The odor degree of low atomization odorless catalyst is significantly reduced, especially in heterogeneous reactions.
Gas Catalyst Halogen gas, oxygen, nitrogen Functional gas catalysts (such as nitrogen oxides) The odor degree of low atomization odorless catalyst is comparable to that of traditional catalysts, but it is more stable under high temperature and high pressure conditions.

Application Case Analysis

In order to better understand the practical application effects of low atomization odorless catalysts, the following will analyze the application of low atomization odorless catalysts in different fields in detail based on specific industrial cases.

1. Petrochemical field

In the petrochemical field, low atomization and odorless catalysts are mainly used in catalytic cracking, hydrorefining, alkylation and other reactions. Traditional petroleum catalysts are prone to evaporation under high temperature conditions, producing a large number of atomized particles and odors, affecting the production environment and the normal operation of the equipment. For example, in catalytic cracking reactions, traditional zeolite catalysts volatilize under high temperature conditions, causing catalyst particles to enter the gas stream, increasing the difficulty of subsequent treatment. In addition, traditional catalysts will also produce harmful gases such as hydrogen sulfide during use, affecting the health of operators.

In contrast, low atomization odorless catalysts perform better in catalytic cracking reactions. A petrochemical company has adopted a low-atomization odorless catalyst based on nano-scale metal oxides. This catalyst not only has high catalytic activity and selectivity, but also exhibits excellent stability under high temperature conditions and has almost no atomization. A phenomenon occurs. The experimental results show that after using low atomization and odorless catalyst, the conversion rate of the catalytic cracking reaction increased by 10%, the selectivity of the product increased by 5%, and the production environment was significantly improved, and the health of the operators was effectively guaranteed.

2. Fine Chemicals Field

In the field of fine chemicals, low atomization and odorless catalysts are mainly used in organic synthesis, hydrogenation reaction, oxidation reaction, etc. Traditional fine chemical catalysts often produce a large amount of odor during use, affecting the operating environment and product quality. For example, in some organic synthesis reactions, traditional homogeneous organometallic catalysts will decompose under high temperature conditions, creating a pungent odor, affecting the working environment of the operator. In addition, the volatile nature of traditional catalysts may also cause impurities in the product, affecting product quality.

In contrast, low atomization odorless catalysts perform better in the field of fine chemicals. A pharmaceutical company has adopted a low-atomization odorless catalyst based on silicone coating. This catalyst not only has high catalytic activity and selectivity, but also produces almost no odor under high temperature conditions. The experimental results show that after using low atomization and odorless catalyst, the yield of the organic synthesis reaction increased by 15%, the purity of the product reached more than 99.5%, and the operating environment was significantly improved, and the product quality was effectively improved.

3. Pharmaceutical field

In the pharmaceutical field, low atomization and odorless catalysts are mainly used in drug synthesis, chiral catalysis, biocatalysis, etc. Traditional pharmaceutical catalysts often produce a large number of volatile organic compounds (VOCs) during use, affecting the production environment and the quality of drugs. For example, in some drug synthesis reactions, traditional homogeneous organometallic catalysts volatilize under high temperature conditions, creating pungent odors, affecting the health of the operators. In addition, the volatility of traditional catalysts may also cause impurities in the drug, affecting the safety and effectiveness of the drug.

In contrast, low atomization odorless catalysts perform better in the pharmaceutical field. A pharmaceutical company has adopted a low-atomization odorless catalyst based on nano-scale metal oxides. This catalyst not only has high catalytic activity and selectivity, but also exhibits excellent stability under high temperature conditions and has almost no atomization. A phenomenon occurs. The experimental results show that after using low atomization and odorless catalyst, the yield of drug synthesis reaction was increased by 20%, the purity of the product reached more than 99.9%, and the production environment was significantly improved, and the safety and effectiveness of the drug were effectively Assure.

4. Field of Materials Synthesis

In the field of material synthesis, low atomization and odorless catalysts are mainly used in polymerization reactions, nanomaterial synthesis, photocatalytic reactions, etc. Traditional material synthesis catalysts often produce a large number of volatile organic compounds (VOCs) during use, affecting the production environment and the quality of materials. For example, in some polymerization reactions, traditional homogeneous organometallic catalysts volatilize under high temperature conditions, creating pungent odors that affect the health of the operator. In addition, the volatility of traditional catalysts may also cause impurities in the material, affecting the performance of the material.

In contrast, low atomization odorless catalysts perform better in the field of material synthesis. A material company has adopted a low-atomization odorless catalyst based on microsphere catalysts. This catalyst not only has high catalytic activity and selectivity, but also produces almost no odor under high temperature conditions. Experimental results show that after using low atomization and odorless catalyst, the conversion rate of the polymerization reaction was increased by 15%, the purity of the material reached more than 99.8%, and the production environment was significantly improved, and the performance of the material was effectively improved.

Future development trends of low atomization odorless catalysts

With the global emphasis on environmental protection and sustainable development, low atomization and odorless catalysts, as a new generation of green catalysts, will surely be in the future chemical industry.plays an increasingly important role in �. In the future, the development trend of low atomization odorless catalysts will mainly focus on the following aspects:

1. Application of Nanotechnology

Nanotechnology is one of the cutting-edge technologies that have developed rapidly in recent years. Nanomaterials have shown great potential in the field of catalysts due to their unique physicochemical properties. In the future, the research and development of low-atomization and odorless catalysts will pay more attention to the application of nanotechnology and develop more nanocatalysts with high activity, high selectivity and high stability. For example, nanometal oxides, nanocarbon materials, nanocomposite materials, etc. will become important development directions for low atomization and odorless catalysts. Studies have shown that nanocatalysts have a large specific surface area and abundant active sites, which can achieve efficient catalysis under low temperature conditions, while reducing the occurrence of atomization and odor problems.

2. Deepening of the concept of green chemistry

Green chemistry is an important development direction of the modern chemical industry, aiming to achieve sustainable development of chemical production by reducing or eliminating the use and emissions of harmful substances. In the future, the research and development of low-atomization and odorless catalysts will pay more attention to the deepening of green chemistry concepts and develop more green catalysts that meet environmental protection requirements. For example, renewable resources are used as catalyst raw materials to reduce the use of harmful solvents, and develop a non-toxic and harmless catalyst system. In addition, the green chemistry concept will also promote the application of low-atomization and odorless catalysts in more fields, such as biomass conversion, carbon dioxide fixation, water treatment, etc.

3. The integration of intelligence and automation technology

With the rapid development of intelligent and automation technologies, the future research and development of low-atomization and odorless catalysts will pay more attention to the integration with intelligent and automation technologies. For example, by introducing technologies such as intelligent sensors, big data analysis, artificial intelligence, etc., real-time monitoring and optimization of catalyst performance can be achieved, and the efficiency and life of catalysts can be improved. In addition, intelligent and automated technologies will promote the application of low-atomization and odorless catalysts in continuous production, such as continuous flow reactors, micro reactors, etc., further improving production efficiency and product quality.

4. Development of multifunctional catalysts

Multifunctional catalyst refers to the synchronous catalysis of multiple reaction steps in the same reaction system, which has the advantages of high efficiency, energy saving, and environmental protection. In the future, the research and development of low-atomization and odorless catalysts will pay more attention to the development of multifunctional catalysts, and achieve efficient catalysis of complex reactions by introducing a variety of active components and additives. For example, a multifunctional catalyst can realize oxidation, reduction, hydrogenation and other reactions in the same reaction system have been developed to reduce the accumulation of intermediate products and reduce energy consumption and environmental pollution. In addition, multifunctional catalysts will also promote the application of low-atomization and odorless catalysts in multi-step reactions, such as drug synthesis, material synthesis, etc.

5. Strengthening of interdisciplinary research

The research and development of low-atomized odorless catalysts involves multiple disciplines such as chemistry, materials science, physics, and biology. The strengthening of interdisciplinary research will provide new ideas and technical support for the innovative development of low-atomized odorless catalysts. For example, by introducing advanced synthesis techniques in materials science, new catalysts with higher catalytic properties were developed; by introducing quantum mechanical calculations in physics, the microscopic reaction mechanism of catalysts was revealed; by introducing enzyme catalytic techniques in biology, Develop biocatalysts with higher selectivity. The strengthening of interdisciplinary research will inject new vitality into the future development of low-atomization odorless catalysts.

Conclusion

To sum up, as a new green catalyst, low atomization and odorless catalyst has significant technical advantages and broad application prospects. Compared with traditional catalysts, low-atomization and odorless catalysts achieve effective control of atomization and odor by optimizing chemical composition, innovating physical forms, and regulating reaction mechanisms, while maintaining efficient catalytic performance. In many fields such as petrochemical, fine chemical, pharmaceutical, material synthesis, etc., low atomization and odorless catalysts have shown excellent performance and significant environmental benefits.

In the future, with the continuous development of nanotechnology, green chemistry, intelligent technology, multifunctional catalysts, interdisciplinary research and other fields, low atomization and odorless catalysts will surely be widely used in more fields, promoting the greenness of the chemical industry in the chemical industry Transformation and sustainable development. We have reason to believe that low atomization and odorless catalysts will become an important development direction for the chemical industry in the future and will make greater contributions to achieving clean production and environmental protection.