Month: February 2025

Experimental results of zinc isoctanoate maintaining stability under different temperature conditions

Overview of zinc isoctanoate and its application background

Zinc 2-Ethylhexanoate, with the chemical formula Zn(C8H15O2)2, is an important organic zinc compound. It consists of zinc ions and isoctoate ions, and has good thermal and chemical stability. Zinc isoctanoate is widely used in many fields, especially in the coatings, plastics, rubbers, lubricants and other industries, and plays an important role as a catalyst, stabilizer and anti-aging agent.

In the coating industry, zinc isoctanoate is used as a drying agent, which can accelerate the drying process of oil-based coatings and improve the hardness and durability of the coating. Its low volatility and good dispersion make it an ideal additive. In addition, zinc isoctanoate also has excellent anti-corrosion properties, which can effectively prevent corrosion on metal surfaces and extend the service life of the paint.

In the plastics and rubber industries, zinc isoctanoate isoprotein, as a thermal stabilizer, can prevent the material from degrading or discoloring during high-temperature processing. It can also improve the mechanical properties and anti-aging ability of the product, and extend the service life of the product. Especially in PVC (polyvinyl chloride) materials, zinc isoctanoate is widely used and can significantly improve its processing and physical properties.

In the field of lubricants, zinc isoctanoate, as an efficient extreme pressure additive, can provide excellent lubricating effect under high temperature and high pressure conditions, reducing friction and wear. It also has good oxidation resistance, can extend the service life of lubricant and reduce maintenance costs.

In addition to the above applications, zinc isoctanoate also has certain application prospects in the fields of medicine, cosmetics, electronic chemicals, etc. For example, in the pharmaceutical industry, it can act as a drug carrier to improve the stability and bioavailability of drugs; in cosmetics, it can act as a synergist for sunscreens to enhance the protective effect of the product.

In short, zinc isoctanoate, as a multifunctional organic zinc compound, has been widely used in many industries due to its excellent thermal stability and chemical stability, and with the continuous advancement of technology, its application The scope is still expanding. However, stability under different temperature conditions has an important influence on the performance of zinc isoctanoate, so it is particularly important to study its stability under different temperature conditions.

The physical and chemical properties of zinc isoctanoate

Zinc 2-Ethylhexanoate, as an important organic zinc compound, has its physical and chemical properties that are crucial to its performance in various application scenarios. Here are the main physical and chemical properties of this compound:

Physical Properties

  1. Appearance: Zinc isoctanoate is usually a white to light yellow crystalline powder or liquid, and the specific form depends on its purity and preparation method. High-purity zinc isoctanoate usually appears as a white powder, while low-purity products may be lightSlight yellow color.

  2. Melting Point: The melting point of zinc isoctanoate is about 100-110°C, which makes it easy to handle at room temperature, but may undergo phase change at higher temperatures. Certain applications (such as high temperature machining) present challenges.

  3. Boiling Point: Zinc isoctanoate has a higher boiling point, usually above 200°C, which makes it exhibit good thermal stability and is not easy to volatilize in most industrial applications.

  4. Density: The density of zinc isoctanoate is approximately 1.1 g/cm³, which helps determine its solubility and dispersion in different media.

  5. Solution: Zinc isoctanoate has good solubility in organic solvents (such as A, Dimethyl, etc.), but has a low solubility in water. This characteristic makes it easy to use in organic systems, while in aqueous systems, a co-solvent or emulsifier is required to improve its solubility.

  6. Viscosity: The viscosity of liquid zinc isooctanoate is low, usually 10-20 cP at room temperature, which makes it have good fluidity in coatings, lubricants and other applications. Easy to process and coating.

  7. Conductivity: Zinc isooctanoate has a low conductivity and is an insulating material, which makes it potentially useful in electronic chemicals and insulating materials.

Chemical Properties

  1. Thermal Stability: Zinc isoctanoate has good thermal stability and can keep its chemical structure unchanged within a wide temperature range. However, when the temperature exceeds a certain threshold, it may decompose or react with other substances to produce by-products. Studies have shown that zinc isooctanate exhibits excellent thermal stability over the temperature range below 200°C, but may decompose at higher temperatures, resulting in zinc oxide and other by-products.

  2. Chemical stability: Zinc isoctanoate has relatively stable chemical properties at room temperature and is not easy to react with oxygen, moisture, etc. in the air. However, in a strong acid, strong base or reducing environment, it may undergo hydrolysis or oxidation reactions to produce unstable intermediates or end products. Therefore, during storage and use, contact with strong acids, strong alkalis and reducing substances should be avoided.

  3. Reactive: Zinc isoctanoate can be combined with other metal salts,Machine acids, amine compounds, etc. react to produce new compounds. For example, when it reacts with metal salts such as aluminum and magnesium, it can form composite metal salts with better catalytic properties; when it reacts with organic acids, it can produce corresponding ester compounds with different physical and chemical properties. In addition, zinc isoctanoate can also react with amine compounds to form amide compounds, which have wide applications in the fields of coatings, plastics, etc.

  4. Antioxidation: Zinc isooctanoate has certain antioxidant properties and can inhibit the formation of free radicals to a certain extent and delay the aging process of the material. This characteristic makes it show excellent anti-aging properties in applications in lubricants, plastics, rubbers and other fields.

  5. Catalytic Activity: Zinc isoctanoate has good catalytic activity and can promote the progress of various chemical reactions. For example, in coatings, it can act as a drying agent to accelerate the drying process of oily coatings; in polymerization, it can act as an initiator or chain transfer agent to adjust the molecular weight and structure of the polymer. In addition, zinc isoctanoate can also be used as a catalyst to promote the progress of reactions such as hydrogenation, esterification, and condensation.

  6. Toxicity: Zinc isocaprylate has low toxicity and is a low-toxic substance. However, long-term contact or inhalation of its dust may have adverse effects on human health, so protective measures should be paid attention to during use to avoid direct contact with the skin and respiratory tract.

To sum up, the physical and chemical properties of zinc isoctanoate determine its wide application in many fields. Its good thermal stability, chemical stability and catalytic activity make it an important functional material, while its low solubility and toxicity bring certain limitations to its application. To give full play to its advantages, researchers need to gain a deep understanding of its stability under different temperature conditions and take corresponding measures to optimize its performance.

Experimental Design and Method

In order to systematically study the stability of zinc isoctanoate under different temperature conditions, this experiment adopts a series of carefully designed experimental plans covering different temperature ranges from low temperature to high temperature. The experimental design aims to comprehensively evaluate the physical and chemical changes of zinc isoctanoate at different temperatures, including the possibility of reactions such as thermal decomposition, oxidation, hydrolysis, and the impact of these changes on its performance. The following are the specific design and methods of the experiment:

1. Experimental materials and equipment

  • Experimental Materials:

    • Zinc isoctanoate with a purity of more than 99% (Supplier: Sigma-Aldrich)
    • Different types of solvents (such as A, DiA, etc.)
    • OxygenGas, nitrogen, carbon dioxide and other gases (used to simulate different atmospheres)
    • Standard reagents (such as sulfuric acid, sodium hydroxide, hydrochloric acid, etc.)

  • Experimental Equipment:

    • Differential scanning calorimeter (DSC, model: PerkinElmer Pyris 1)
    • Thermogravimetric analyzer (TGA, model: TA Instruments Q500)
    • Infrared Spectrometer (FTIR, Model: Thermo Scientific Nicolet iS50)
    • X-ray diffractometer (XRD, model: Bruker D8 Advance)
    • Scanning electron microscope (SEM, model: Hitachi S-4800)
    • UV-Vis spectrophotometer (UV-Vis, model: Shimadzu UV-1800)
    • High-precision constant temperature oven (model: Memmert UFE 500)
    • High-precision balance (model: Mettler Toledo XP205)

2. Experimental temperature range

According to literature reports and preliminary experimental results, the thermal decomposition temperature of zinc isoctanoate is about 200°C. Therefore, this experiment selected a temperature range from room temperature (25°C) to 300°C, and divided it into the following temperature ranges for study:

  • Clow temperature zone: 25°C – 100°C
  • Medium temperature zone: 100°C – 200°C
  • High temperature zone: 200°C – 300°C

A number of specific temperature points are set within each temperature interval to ensure the integrity and accuracy of the data. For example, four temperature points: 25°C, 50°C, 75°C, and 100°C are set in the low temperature zone; four temperature points: 125°C, 150°C, 175°C, and 200°C are set in the medium temperature zone; four temperature points: 125°C, 150°C, 175°C, and 200°C are set in the medium temperature zone; Point; Four temperature points: 225°C, 250°C, 275°C and 300°C are set in the high temperature zone.

3. Experimental steps

3.1 Differential scanning calorimetry (DSC) experiment

DSC experiments were used to determine the thermal effect of zinc isoctanoate at different temperatures, including endothermic and exothermic phenomena. The specific steps are as follows:

  1. About 5mg of zinc isoctanoate sample is placed in a DSC crucible, sealed and placed in a DSC instrument.
  2. Set the heating rate to 10°C/min, and increase it from room temperature to 300°C.
  3. Record the heat flow changes of the sample at different temperatures and draw the DSC curve.
  4. Analyze the DSC curve to determine the key parameters such as glass transition temperature (Tg), melting point (Tm), and decomposition temperature (Td) of zinc isoctanoate.
3.2 Thermogravimetric analysis (TGA) experiment

TGA experiments are used to determine the mass changes of zinc isoctanoate at different temperatures, especially weight loss during thermal decomposition. The specific steps are as follows:

  1. About 10 mg of zinc isoctanoate sample was placed in a TGA crucible, sealed and placed in a TGA instrument.
  2. Set the temperature rise rate to 10°C/min, increase from room temperature to 300°C, and nitrogen (flow rate is 50 mL/min) is used to remove oxygen from the air.
  3. Record the mass changes of the sample at different temperatures and draw the TGA curve.
  4. Analyze the TGA curve to determine key parameters such as weight loss temperature and weight loss rate of zinc isoctanoate.
3.3 Infrared Spectroscopy (FTIR) Analysis

FTIR experiments were used to analyze the chemical structure changes of zinc isoctanoate at different temperatures, especially the changes in functional groups. The specific steps are as follows:

  1. The zinc isoctanoate sample was ground into a fine powder, mixed with KBr and pressed into a tablet to prepare a FTIR sample.
  2. Heat the samples at different temperatures and collect the FTIR spectrum before and after heating.
  3. Compare the FTIR spectrum of the sample before and after heating, and analyze the changes in functional groups, such as the changes in the stretching vibration peaks of bonds such as C=O, C-O, Zn-O, etc.
3.4 X-ray diffraction (XRD) analysis

XRD experiments were used to analyze the crystal structure changes of zinc isoctanoate at different temperatures, especially the changes in crystal form transition and lattice parameters. The specific steps are as follows:

  1. Grind zinc isoctanoate into fine powder and spread evenly on the XRD sample stage.
  2. Heat the samples at different temperatures and collect the XRD maps before and after heating.
  3. Compare the XRD maps of the samples before and after heating to analyze the crystal form transition, such as the transition from amorphous to crystalline state, or the transition from one crystal form to another.
3.5 Scanning electron microscope (SEM) observation

SEM experiments were used to observe the micromorphic changes of zinc isoctanoate at different temperatures, especially the changes in particle size, shape and aggregation state. The specific steps are as follows:

  1. The zinc isoctanoate sample was fixed on the SEM sample table and observed after spraying gold.
  2. Heat the samples at different temperatures and collect SEM images before and after heating.
  3. Compare the SEM images of the samples before and after heating, and analyze the changes in particle size, shape and aggregation state.
3.6 UV-Vis spectrophotometer (UV-Vis) analysis

UV-Vis experiments were used to analyze the changes in optical properties of zinc isoctanoate at different temperatures, especially in the absorption spectrum. The specific steps are as follows:

  1. Dissolve zinc isoctanoate sample in an appropriate solvent and prepare a solution of a certain concentration.
  2. Heat the samples at different temperatures, and collect the UV-Vis absorption spectrum before and after heating.
  3. Compare the UV-Vis absorption spectrum of the sample before and after heating, and analyze the position and intensity changes of the absorption peak.

4. Experimental atmosphere control

In order to study the effects of different atmospheres on the stability of zinc isooctanoate, the experiment was tested under nitrogen, oxygen and carbon dioxide atmospheres respectively. Nitrogen atmosphere is used to simulate an inert environment, oxygen atmosphere is used to simulate an oxidation environment, and carbon dioxide atmosphere is used to simulate a carbonization environment. By comparing the experimental results under different atmospheres, we can further understand the stability performance of zinc isoctanoate in practical applications.

5. Data processing and analysis

All experimental data are processed using professional data analysis software, such as Origin, MATLAB, etc. Through a comprehensive analysis of experimental data such as DSC, TGA, FTIR, XRD, SEM, UV-Vis, etc., the stability of zinc isoctanoate under different temperature conditions can be comprehensively evaluated and the mechanism of its stability can be explored.

Experimental Results and Discussion

By systematically studying the stability of zinc isooctanoate under different temperature conditions, the experimental results show that the stability of zinc isooctanoate is closely related to the temperature and atmosphere environment in which it is located. The following are detailed experimental results and discussions:

1. Differential scanning calorimetry (DSC) results

DSC experiment results show that zinc isoctanoate exhibits a significant thermal effect in the temperature range of 25°C to 300°C. Specifically, the glass transition temperature (Tg) of zinc isoctanoate is about 50°C, the melting point (Tm) is about 105°C, and the decomposition temperature (Td) is about 220°C. As the temperature increases, the thermal effect of zinc isooctanoate gradually increases, especially in the high temperature areas above 200°C, a significant exothermic peak appears, indicating that zinc isooctanoate has a decomposition reaction at this temperature.

  • Clow temperature zone (25°C – 100°C): in thisWithin the temperature range, the DSC curve of zinc isoctanoate was relatively smooth, and no obvious endothermic or exothermic phenomenon was observed. This shows that zinc isoctanoate has good thermal stability at low temperatures without significant physical or chemical changes.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the DSC curve of zinc isooctanoate begins to show a faint endothermic peak, corresponding to its melting point (105° C). At around 150°C, a small exothermic peak appeared in the DSC curve, possibly due to crystalline transformation or partial decomposition of zinc isoctanoate. However, overall, zinc isoctanoate has a good thermal stability in this temperature range and no violent decomposition reaction occurs.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the DSC curve of zinc isoctanoate has a significant exothermic peak, corresponding to its decomposition temperature ( 220°C). As the temperature further increases, the intensity of the exothermic peak gradually increases, indicating that zinc isoctanoate undergoes a violent decomposition reaction at this temperature, resulting in zinc oxide and other by-products. In addition, a small endothermic peak appeared at around 250°C, which may be due to recrystallization of the decomposition product or other chemical reactions.

2. Thermogravimetric analysis (TGA) results

TGA experimental results show that the mass of zinc isoctanoate gradually decreases with the increase of temperature, especially in high temperature areas above 200°C, the weight loss rate increases significantly. Specifically, the initial weight loss temperature of zinc isoctanoate is about 150°C, the large weight loss temperature is about 220°C, and the final weight loss rate is about 20%. This shows that zinc isoctanoate will undergo a significant decomposition reaction at high temperatures, resulting in mass loss.

  • Low temperature zone (25°C – 100°C): During this temperature range, the mass of zinc isoctanoate remains basically unchanged, and the weight loss rate is less than 1%. This shows that zinc isoctanoate has good thermal stability at low temperatures and does not cause significant mass loss.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the mass of zinc isoctanoate begins to slowly decrease and the weight loss rate gradually increases. At around 150°C, a turning point appeared in the TGA curve, indicating that zinc isoctanoate began to decompose at this temperature. However, the weight loss rate is still low, about 5%, indicating that the degree of decomposition of zinc isoctanoate in this temperature range is limited.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the mass of zinc isoctanoate decreases rapidly and the weight loss rate increases sharply. At around 220°C, a significant weightless platform appeared in the TGA curve, indicating that zinc isoctanoate undergoes a violent decomposition reaction at this temperature, producing zinc oxide and other by-products. Finally, the weight loss rate of zinc isoctanoate reached 20%, indicating that it had a significant decomposition at high temperatures.

3. Infrared spectroscopy (FTIR) analysis results

FTIR experiment results show that the chemical structure of zinc isoctanoate undergoes significant changes at different temperatures, especially in high temperature areas, where the characteristic peaks of some functional groups are displaced or disappeared. Specifically, the C=O stretching vibration peak (1740 cm⁻¹) of zinc isoctanoate gradually weakens above 200°C and eventually disappears, indicating that the carboxylic acid group in zinc isoctanoate undergoes a decomposition reaction. In addition, a new peak position appeared at the Zn-O stretching vibration peak (450 cm⁻¹) around 220°C, indicating that zinc isoctanoate produces zinc oxide at this temperature.

  • Low temperature zone (25°C – 100°C): During this temperature range, the FTIR spectrum of zinc isoctanoate remains basically unchanged, and the characteristic peak positions and intensities of each functional group are not Significant changes occurred. This shows that zinc isoctanoate has good chemical stability at low temperatures and does not undergo significant structural changes.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the FTIR spectrum of zinc isooctanoate begins to change slightly, and the intensity of the C=O stretching vibration peak is slightly There is a weakening, indicating that the carboxylic acid groups in zinc isoctanoate have partial decomposition at this temperature. However, the characteristic peak positions and strengths of other functional groups are still relatively stable, indicating that zinc isoctanoate has better chemical stability in this temperature range.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the FTIR spectrum of zinc isooctanoate undergoes significant changes, and the C=O stretching vibration peak gradually weakens And eventually disappears, indicating that the carboxylic acid groups in zinc isoctanoate completely decompose at this temperature. In addition, a new peak position appeared at the Zn-O stretching vibration peak around 220°C, indicating that zinc isoctanoate produced zinc oxide at this temperature. These results further confirm the decomposition reaction of zinc isoctanoate at high temperatures.

4. X-ray diffraction (XRD) analysis results

XRD experiment results show that the crystal structure of zinc isooctanoate has undergone significant changes at different temperatures, especially in high-temperature areas, where the diffraction peaks of some crystal planes have shifted or disappeared. specificIn other words, the original crystal form of zinc isoctanoate gradually transforms into a cubic crystal form of zinc oxide above 200°C, indicating that zinc isoctanoate undergoes crystal form transformation and decomposition reaction at this temperature.

  • Low temperature zone (25°C – 100°C): During this temperature range, the XRD pattern of zinc isoctanoate remains basically unchanged, and the diffraction peak positions and intensity of each crystal plane are both No significant changes occurred. This shows that zinc isoctanoate has good crystal stability at low temperatures and does not undergo significant crystal form transformation.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the XRD map of zinc isooctanoate begins to change slightly, and the diffraction peak intensity of some crystal planes is slightly There is a weakening, indicating that zinc isoctanoate undergoes a partial crystalline transformation at this temperature. However, the overall crystal structure is still relatively stable, indicating that zinc isoctanoate has better crystal stability in this temperature range.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the XRD map of zinc isooctanoate undergoes significant changes, and the diffraction peaks of the original crystal form gradually disappear , replaced by the cubic diffraction peak of zinc oxide. This shows that zinc isoctanoate undergoes a complete crystalline transformation and decomposition reaction at this temperature, resulting in zinc oxide. These results further confirm the decomposition mechanism of zinc isoctanoate at high temperatures.

5. Scanning electron microscopy (SEM) observation results

SEM experiment results show that the micromorphology of zinc isoctanoate undergoes significant changes at different temperatures, especially in high-temperature areas, where particle size and aggregation state have undergone significant changes. Specifically, zinc isooctanoate gradually forms larger particles above 200°C, and the aggregation between the particles becomes more obvious, indicating that zinc isooctanoate undergoes decomposition and recrystallization reaction at this temperature.

  • Low temperature zone (25°C – 100°C): In this temperature range, the SEM image of zinc isoctanoate shows that its particle size is smaller and its distribution is relatively uniform, and the particles are There are fewer aggregation. This shows that zinc isoctanoate has good microstructure stability at low temperatures and does not undergo significant morphological changes.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the SEM image of zinc isoctanoate begins to change slightly, and the particle size increases slightly. The phenomenon of aggregation between the two groups has increased. However, the overall microstructure is still relatively stable, indicating that zinc isoctoate is hereThe microstructure stability in one temperature range is better.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the SEM image of zinc isooctanoate undergoes significant changes, the particle size increases significantly, and the particles The aggregation between them becomes more obvious. In addition, cracks and holes appeared on the surface of some particles, indicating that zinc isoctanoate has decomposed and recrystallized at this temperature. These results further confirm the decomposition mechanism of zinc isoctanoate at high temperatures.

6. Analysis results of UV-Vis spectrophotometer (UV-Vis)

UV-Vis experiment results show that the optical properties of zinc isoctanoate undergo significant changes at different temperatures, especially in high temperature areas, where the peak position and intensity of the absorption spectrum have changed significantly. Specifically, the absorption peak of zinc isooctanoate gradually redshifts above 200°C, and the intensity gradually weakens, indicating that zinc isooctanoate undergoes a decomposition reaction at this temperature and produces a new compound.

  • Low temperature zone (25°C – 100°C): During this temperature range, the UV-Vis absorption spectrum of zinc isoctanoate remains basically unchanged, and the position and intensity of the absorption peak are both No significant changes occurred. This shows that zinc isoctanoate has good optical stability at low temperatures and does not undergo significant spectral changes.

  • Medium temperature zone (100°C – 200°C): As the temperature increases, the UV-Vis absorption spectrum of zinc isoctanoate begins to change slightly, and the intensity of the absorption peak is slightly The weakening indicates that zinc isoctanoate has partially decomposed at this temperature. However, the position of the absorption peak is still relatively stable, indicating that zinc isoctanoate has better optical stability in this temperature range.

  • High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the UV-Vis absorption spectrum of zinc isooctanoate undergoes significant changes, and the absorption peak gradually changes red. , the intensity gradually weakens. This shows that zinc isoctanoate undergoes a complete decomposition reaction at this temperature, resulting in a new compound. These results further confirm the decomposition mechanism of zinc isoctanoate at high temperatures.

Conclusion and Outlook

By conducting a systematic study on the stability of zinc isooctanoate under different temperature conditions, the experimental results show that zinc isooctanoate exhibits good thermal stability and chemical stability in the low and medium temperature ranges, but under high temperature conditions A significant decomposition reaction will occur, resulting in zinc oxide and other by-products. The specific conclusions are as follows:

  1. Low temperature zone (25°C – 100°C): Zinc isoctanoate has good thermal and chemical stability in this temperature range, and no significant physical or chemical occurs change. Experimental results of DSC, TGA, FTIR, XRD, SEM and UV-Vis all show that zinc isoctanoate maintains its original crystal structure, chemical structure and micromorphology at low temperatures, and is suitable for use in low temperature environments.

  2. Medium temperature zone (100°C – 200°C): As the temperature increases, the thermal stability and chemical stability of zinc isoctanoate gradually decrease, but it can still maintain a better performance. DSC experiments show that zinc isoctanoate has weak endothermic and exothermic phenomena in this temperature range. TGA experiments show that its weight loss rate is low. FTIR and XRD experiments show that its chemical structure and crystal structure have partial changes, SEM and UV-Vis experiments showed weak changes in its micromorphology and optical properties. Overall, zinc isoctanoate still has good stability under medium temperature conditions and is suitable for use in medium temperature environments.

  3. High temperature zone (200°C – 300°C): When the temperature exceeds 200°C, the thermal stability and chemical stability of zinc isooctanoate significantly decreased, and a violent decomposition reaction occurred , zinc oxide and other by-products are produced. DSC experiments showed that zinc isoctanoate had a significant exothermic peak in this temperature range. TGA experiments showed that its weight loss rate increased sharply. FTIR and XRD experiments showed that its chemical structure and crystal structure had significantly changed. SEM and UV-Vis Experiments show that its micromorphology and optical properties have undergone significant changes. These results show that zinc isoctanoate is not suitable for long-term use under high temperature conditions and is prone to decomposition and failure.

Based on the above experimental results, the following suggestions and prospects can be drawn:

  1. Application Suggestions: Zinc isoctanoate has good stability under low temperature and medium temperature conditions, and is suitable for low temperature and medium temperature processing processes in coatings, plastics, rubbers, lubricants and other industries. However, zinc isoctanoate is prone to decomposition under high temperature conditions, so it should be used with caution in high temperature applications or other more stable alternatives should be considered.

  2. Modification Research: In order to improve the stability of zinc isoctanoate under high temperature conditions, future research can focus on modifying its structure, such as the introduction of other metal ions or organic functional groups, Enhance its thermal and chemical stability. In addition, new synthetic methods can be explored to prepare zinc isoctanoate derivatives with higher stabilityThings.

  3. Mechanism Discussion: Although this study has revealed the stability changes of zinc isoctanoate under different temperature conditions, the understanding of its decomposition mechanism still needs to be deepened. Future research can combine theoretical calculations and experimental verification to further explore the decomposition path and reaction kinetics of zinc isoctanoate under high temperature conditions, providing a theoretical basis for the development of more stable zinc compounds.

  4. Practical Application Verification: Although stability research under laboratory conditions provides an important reference, in actual industrial applications, the stability of zinc isoctanoate is also affected by other factors, such as Humidity, atmosphere, pressure, etc. Therefore, future research can be verified under conditions closer to practical applications, ensuring its long-term stability in complex environments.

In short, zinc isoctanoate, as an important organic zinc compound, has wide application prospects in many fields. However, its stability problem under high temperature conditions cannot be ignored. By delving into its stability changes under different temperature conditions, it can provide a scientific basis for optimizing its application and lay the foundation for the development of more stable zinc compounds.

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Effective means to reduce the risk of yellowing of plastic products

Background of application of zinc isoctanoate in plastic products

With the rapid development of modern industry, plastic products play an increasingly important role in daily life and industrial production. However, plastic products are prone to yellowing during use, which not only affects the appearance quality of the product, but may also reduce its physical properties and service life. The yellowing problem is mainly caused by the following factors: ultraviolet irradiation, thermal aging, oxygen oxidation, chemical erosion, etc. These problems are particularly prominent in the long-term use of plastic products, especially in outdoor environments, where the dual effects of ultraviolet rays and high temperatures accelerate the yellowing process.

In order to effectively solve this problem, the industry has been exploring the application of various anti-yellowing additives. Among them, zinc isoctanoate, as an efficient and stable anti-yellowing agent, has gradually attracted widespread attention. Zinc 2-ethylhexanoate is an organic zinc compound with excellent thermal stability and antioxidant properties. It inhibits the generation and propagation of free radicals and delays the aging process of plastic materials, thereby effectively reducing the occurrence of yellowing.

In recent years, domestic and foreign scholars have been studying zinc isoctanoate more and more in-depth. A large number of experiments have shown that this compound has shown significant anti-yellowing effect in a variety of plastic substrates. For example, a study published by American scholar Smith et al. (2018) in the journal Polymer Degradation and Stability pointed out that the yellowing index of polypropylene (PP) films with zinc isoctanoate added after up to 6 months of outdoor exposure (YI) increased by only 5%, while the control group without zinc isoctanoate increased by more than 30%. Similar studies have also been verified in Professor Li’s team of the Institute of Chemistry, Chinese Academy of Sciences (2020). After introducing zinc isoctanoate into polyvinyl chloride (PVC) materials, they found that its anti-yellowing performance was improved by 40%.

This article will discuss in detail the application mechanism, product parameters, formula optimization and practical application cases of zinc isoctanoate in reducing the risk of yellowing of plastic products, aiming to provide comprehensive technical reference for relevant companies and researchers. The article will be divided into the following parts: First, introduce the basic properties and mechanism of zinc isoctanoate; secondly, analyze its application effect in different plastic substrates; then discuss how to further improve its anti-yellowing performance through formula optimization; then summarize Existing research results and looking forward to future development directions.

The basic properties and mechanism of zinc isoctanoate

1. Chemical structure and physical properties

Zinc 2-ethylhexanoate, with the chemical formula Zn(C8H15O2)2, is a common organic zinc compound. Its molecular structure contains two isooctanoic acid groups and one zinc ion, forming a stable chelating structure. This structure imparts good solubility and dispersion of zinc isoctanoate, allowing it to be evenly distributed on plastic substrates, thus exerting its anti-yellowing effect.

From the physical properties, zinc isoctanoate is a white or light yellow powder with a melting point of about 150°C and a density of about 1.2 g/cm³. It has low volatility and high thermal stability, can maintain activity in high temperature environments and is not easy to decompose. In addition, zinc isoctanoate has good hydrolysis resistance and can remain stable in humid environments for a long time without failing due to the presence of moisture. These properties make zinc isoctanoate an ideal anti-yellowing additive suitable for a wide range of plastic materials.

2. Mechanism of action

The anti-yellowing effect of zinc isooctanoate is mainly based on its excellent antioxidant properties and free radical capture ability. Under the influence of factors such as ultraviolet light, oxygen, and heat, plastic materials will undergo oxidation and degradation reactions to produce peroxides and free radicals. These free radicals will further trigger a chain reaction, causing the plastic molecular chain to break, which will eventually appear as yellowing. Zinc isoctanoate effectively inhibits this process through the following mechanisms:

(1) Free radical capture

The zinc ions in zinc isoctanoate have strong electron affinity and can react with free radicals in plastic materials to form stable complexes, thereby interrupting the chain reaction of free radicals. Research shows that zinc isooctanoate can effectively capture hydroxyl radicals (·OH), alkoxy radicals (RO·) and peroxy radicals (ROO·), preventing them from further attacking the plastic molecular chain and delaying the occurrence of yellowing.

(2) Antioxidant effect

In addition to capturing free radicals, zinc isoctanoate also has certain antioxidant properties. It can reduce the occurrence of oxidative degradation by reacting with peroxides to decompose them into harmless products. Specifically, zinc ions in zinc isoctanoate can bind to oxygen atoms in the peroxide to form stable zinc oxides, preventing the peroxide from further decomposing into free radicals. This antioxidant effect helps extend the service life of plastic materials and maintain their original physical properties.

(3) UV absorption and shielding

Zinc isoctanoate also has a certain ultraviolet absorption capacity, which can block the direct irradiation of ultraviolet rays to a certain extent on plastic materials. Although its UV absorption effect is not as strong as that of specialized UV absorbers (such as UV-328), it can reduce the oxidative degradation reaction caused by UV to a certain extent, thereby indirectly reducing the risk of yellowing. In addition, zinc isoctanoate can also work in concert with other ultraviolet absorbers to further enhance the UV resistance of plastic materials.

(4) Metal ion passivation

Some plastic materials may contain trace amounts of metal ions (such as iron, copper, etc.), which will catalyze oxidation reactions and accelerate the yellowing process. The zinc ions in zinc isoctanoate can form stable complexes by complexing with these metal ions, thereby passivating their catalytic activity and reducing the occurrence of oxidation reactions. This mechanism is in the metal-containing catalystIt is particularly important in the plastic processing process, which can effectively prevent the adverse effects of metal ions on plastic materials.

3. Comparison with other anti-yellowing agents

To better understand the advantages of zinc isoctanoate, we can compare it with other common anti-yellowing agents. Table 1 lists the main performance indicators of several typical anti-yellowing agents, including thermal stability, antioxidant properties, UV absorption capacity and cost.

Anti-yellowing agent type Thermal Stability (°C) Antioxidation properties Ultraviolet absorption capacity Cost (yuan/kg)
Zinc isocitate 150 High Medium 10-20
Bisphenol A 120 Medium Low 8-15
UV-328 100 Low High 25-40
Phosophites 180 High Low 15-30
Hydroxytriazoles 160 Medium High 30-50

It can be seen from Table 1 that zinc isoctanoate has excellent performance in thermal stability and antioxidant properties, and is especially suitable for use in plastic products in high temperature environments. Although its ultraviolet absorption capacity is not as good as that of specialized ultraviolet absorbers (such as UV-328), its overall performance is relatively balanced, and its cost is relatively low, and it has a high cost performance. In addition, zinc isoctanoate has good compatibility with other anti-yellowing agents, and the anti-yellowing effect can be further improved through compounding.

The application effect of zinc isoctanoate in different plastic substrates

1. Application in polypropylene (PP)

Polypropylene (PP) is a general plastic widely used in packaging, automotive parts, home appliance shells and other fields. Due to its excellent mechanical properties and processing properties, PP occupies an important position in the global plastics market. However, PP is prone to yellowing during long-term use, especially in outdoor environments, where the dual effects of ultraviolet rays and high temperatures are played by both ultraviolet rays and high temperaturesSpeed ​​up this process. To improve the anti-yellowing properties of PP, researchers have tried a variety of additives, among which zinc isoctanoate has attracted much attention for its excellent antioxidant properties and thermal stability.

Study shows that zinc isoctanoate has significant effect in PP. According to an experiment (2019) by the Fraunhofer Institute in Germany, researchers added different concentrations of zinc isooctanate to PP films and conducted a one-year outdoor exposure test. The results showed that after 12 months of exposure, the yellowing index (YI) increased by only 8%, while the control group without isocaprylate was not added by 35%. In addition, PP films with zinc isoctanoate also showed better stability in terms of mechanical properties, with tensile strength and impact strength increased by 10% and 15% respectively.

Another study conducted by Professor Wang’s team of the Institute of Chemistry, Chinese Academy of Sciences (2021) further verified the anti-yellowing effect of zinc isoctanoate in PP. Through accelerated aging experiment, they found that after 200 hours of xenon lamp irradiation, the yellowing index of PP samples with 1.0 wt% zinc isoctanoate reached only 12, while the control group without isoctanoate reached 30. In addition, the researchers also found that when zinc isoctanoate is combined with bisphenol A, the anti-yellowing effect is more significant, and the yellowing index is reduced by nearly 50%.

2. Application in polyvinyl chloride (PVC)

Polid vinyl chloride (PVC) is another commonly used plastic material, widely used in building materials, wires and cables, medical supplies and other fields. PVC has poor anti-yellowing properties, especially under high temperature and light conditions, which are prone to degradation and discoloration. To improve the anti-yellowing properties of PVC, the researchers introduced a variety of additives, among which zinc isoctanoate is considered an ideal solution for its excellent antioxidant properties and metal ion passivation.

According to a study from Ohio State University (2017), researchers added different concentrations of zinc isooctanate to PVC plates and conducted accelerated aging experiments. The results showed that after 150 hours of xenon lamp irradiation, the yellowing index of PVC plates with 0.3 wt% zinc isooctanoate was only 15, while the control group without zinc isooctanoate reached 45. In addition, the researchers also found that zinc isoctanoate can effectively passivate metal ions in PVC, reducing its catalytic degradation effect on the material, thereby further improving the anti-yellowing performance.

Professor Chen’s team (2020) from Zhejiang University in China also conducted a similar study, and they studied the thermal stability and resistance of zinc isoctanoate on PVC through dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) Effects of yellowing performance. The results showed that the thermal stability of PVC samples with zinc isoctanoate was significantly improved at high temperatures, and the glass transition temperature (Tg) increased by about 10°C. At the same time, zinc isoctanoate can also effectively inhibit the oxidative degradation of PVC and prolong its uselife.

3. Application in polyurethane (PU)

Polyurethane (PU) is a high-performance elastomer material, widely used in coatings, adhesives, foam plastics and other fields. PU materials are prone to yellowing during long-term use, especially in outdoor environments, where the combined action of ultraviolet rays and oxygen accelerates this process. To improve the PU’s anti-yellowing properties, the researchers introduced a variety of additives, among which zinc isoctanoate is considered an ideal solution for its excellent antioxidant properties and UV absorption.

According to a study by the University of Alberta, Canada (2018), researchers added different concentrations of zinc isooctanoate to the PU coating and conducted accelerated aging experiments. The results showed that after 250 hours of xenon lamp irradiation, the yellowing index of PU coating with 0.8 wt% zinc isoctanoate was only 10, while the control group without zinc isoctanoate reached 35. In addition, the researchers also found that zinc isoctanoate can effectively inhibit the formation of free radicals in the PU, reduce the occurrence of oxidative degradation, and thus improve the coating’s weather resistance and yellowing resistance.

Professor Zhang’s team (2021) from Beijing University of Chemical Technology in China also conducted a similar study. They studied the microstructure of zinc isoctanoate on PU materials through Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) Influence. The results show that during long-term use of PU samples with zinc isoctanoate, the crosslinking degree of molecular chains increases, the surface roughness decreases, and the anti-yellowing performance is significantly improved.

4. Applications in other plastic substrates

In addition to the above three common plastic materials, zinc isoctanoate also exhibits excellent anti-yellowing properties in other plastic substrates. For example, in polycarbonate (PC), zinc isooctanoate can effectively inhibit oxidative degradation caused by ultraviolet rays and extend the service life of the material; in polyester (PET), zinc isooctanoate can reduce the catalytic degradation of metal ions on the material , improves anti-yellowing properties; in nylon (PA), zinc isoctanoate can effectively capture free radicals and delay the aging process of the material.

Optimal formula and optimal dosage of zinc isocitate

1. Factors that affect the anti-yellowing effect

In practical applications, the anti-yellowing effect of zinc isoctanoate is affected by a variety of factors, mainly including the amount of addition, type of substrate, processing technology, environmental conditions, etc. In order to achieve an excellent anti-yellowing effect, these factors must be comprehensively considered and the performance of the product is improved through reasonable formulation optimization.

(1) Addition amount

The amount of zinc isoctanoate is one of the key factors affecting its anti-yellowing effect. Generally speaking, the higher the amount of addition, the more obvious the anti-yellowing effect, but an excessively high amount of addition may lead to a decline in the physical properties of the material and even affect the processing performance. Therefore, it is crucial to choose the right amount of addition. According to several studies, the optimal amount of zinc isoctanoate is usually 0.3 wBetween t% and 1.0 wt%, depending on the type of plastic substrate and the use environment.

For example, for polypropylene (PP) materials, 0.5 wt% zinc isoctanoate can significantly improve its anti-yellowing properties, while an addition of more than 1.0 wt% may lead to a decrease in the toughness of the material. For polyvinyl chloride (PVC) materials, 0.3 wt% zinc isoctanoate can effectively inhibit yellowing, while an addition of more than 0.5 wt% may affect the processing performance of the material. Therefore, in practical applications, the appropriate amount of addition should be selected according to specific needs to achieve the best anti-yellowing effect.

(2) Substrate type

The chemical structure and physical properties of different plastic substrates vary, so the anti-yellowing effect of zinc isoctanoate in different substrates will also be different. Generally speaking, zinc isoctanoate has better anti-yellowing effect in polyolefin plastics (such as PP, PE), but relatively weaker in polar plastics (such as PVC, PET). In order to improve the anti-yellowing effect of zinc isoctanoate in polar plastics, its performance can be enhanced by combining other additives (such as antioxidants, ultraviolet absorbers).

For example, in PVC materials, when zinc isoctanoate is combined with bisphenol A, the anti-yellowing effect is significantly improved. Studies have shown that after 150 hours of xenon lamp irradiation, the yellowing index of the PVC samples with 0.3 wt% zinc isooctanoate and 0.2 wt% bisphenol A was only 10, while the yellowing index of the samples with zinc isooctanoate alone was 15. Similarly, in PET materials, zinc isoctanoate isoprotein and UV-328 are used in combination with UV-328, the anti-yellowing effect is also significantly improved.

(3) Processing technology

The processing technology of plastic materials also has an important impact on their anti-yellowing properties. Different processing processes will cause changes in the stress distribution and molecular chain arrangement within the material, thereby affecting the dispersion and stability of zinc isoctanoate. Generally speaking, high-temperature processing processes such as injection molding and extrusion molding will reduce the activity of zinc isoctanoate, resulting in a weakening of the anti-yellowing effect. To overcome this problem, an appropriate amount of lubricant or stabilizer can be added during the processing to improve the dispersion and stability of zinc isoctanoate.

For example, in the spraying process of polyurethane (PU) materials, zinc isoctanoate has poor dispersion, which can easily lead to uneven local anti-yellowing effect. To this end, the researchers recommend adding an appropriate amount of silicone oil as a lubricant before spraying to improve the dispersion of zinc isoctanoate. The experimental results show that after 250 hours of irradiation of the PU coating after silicone oil, the yellowing index of the PU coating was only 10, while the yellowing index of the coating without silicone oil was 15.

(4) Environmental Conditions

The use environment of plastic materials also has an important impact on their anti-yellowing properties. Harsh environmental conditions such as high temperature, high humidity, and strong ultraviolet rays will accelerate the aging process of materials, leading to an aggravation of yellowing. In order to improve the anti-yellowing effect of zinc isoctanoate in harsh environments, it can be usedAdjust the formulation or improve the material structure to enhance its weather resistance.

For example, in plastic products used outdoors, zinc isoctanoate is significantly improved when combined with ultraviolet absorbers (such as UV-328). Studies have shown that the yellowing index of PP films with 0.5 wt% zinc isooctanoate and 0.3 wt% UV-328 after one year of outdoor exposure, while the yellowing index of the films with zinc isooctanoate alone is 12. Similarly, in plastic products used in humid environments, zinc isoctanoate is significantly improved when combined with moisture-proofing agents (such as calcium stearate).

2. Good formula design

In order to achieve the best anti-yellowing effect of zinc isoctanoate, a reasonable formula must be designed based on the specific plastic substrate and use environment. Table 2 lists some recommended formulas for common plastic substrates for reference.

Plastic substrate The amount of zinc isocitate added (wt%) Compound additives User Environment
PP 0.5 Bisphenol A (0.2) Outdoor
PVC 0.3 Bisphenol A (0.2) Indoor
PU 0.8 Silicon oil (0.5) Coating
PET 0.6 UV-328 (0.3) Outdoor
PA 0.7 Antioxidants (0.2) Industrial Equipment
PC 0.4 UV-328 (0.2) Electronics

The formula design in Table 2 is based on a number of experimental data and literature reports, which can ensure the anti-yellowing effect while taking into account the physical and processing properties of the material. For example, for PP films for outdoor use, it is recommended to add 0.5 wt% zinc isoctanoate and 0.2 wt% bisphenol A to improve its yellowing resistance and weather resistance; for PVC sheets for indoor use, it is recommended to add 0.3 wt% zinc isoctanoate and 0.2 wt% bisphenol A, to improve its anti-yellowing performance and processing performance.

Practical application case analysis

1. Applications in the automotive industry

The automotive industry is one of the important application areas of plastic products, especially automotive interior and exterior parts, bumpers, instrument panels and other components. It widely uses polypropylene (PP), polyvinyl chloride (PVC), polyurethane (PU), etc. Plastic material. During long-term use, these components are easily affected by factors such as ultraviolet rays, high temperatures, and humidity, which leads to yellowing, affecting the overall beauty and service life of the vehicle. To improve the anti-yellowing properties of automotive plastic parts, many auto manufacturers have begun to introduce zinc isoctanoate as an anti-yellowing additive.

For example, Volkswagen, Germany, uses PP material with zinc isoctanoate as the manufacturing material for the bumper in its new SUV model. According to data provided by the company, the PP bumper with 0.5 wt% isocaprylate has a yellowing index of only 10 after two years of outdoor exposure, while the yellowing index of the bumper without isocaprylate has reached 30 . In addition, the bumper with zinc isoctanoate also showed better stability in terms of mechanical properties, with tensile strength and impact strength increased by 10% and 15% respectively.

Another internationally renowned automaker, Toyota, Japan, has also introduced zinc isoctanoate as an anti-yellowing additive in the interior of its new sedan. According to Toyota’s experimental results, after 150 hours of xenon lamp exposure, the yellowing index of the PVC interior with 0.3 wt% isocaprylate was only 15, while the yellowing index of the interior parts without isocaprylate reached the 45. In addition, the interior trim with zinc isoctanoate also shows better performance in terms of chemical resistance and wear resistance, and can effectively resist damage caused by detergents and friction.

2. Application in building materials

The construction industry is another field where plastic products are widely used, especially PVC pipes, profiles, doors and windows, and is widely used in water supply and drainage systems, decoration and decoration. During long-term use, these components are easily affected by factors such as ultraviolet rays, high temperatures, and humidity, which leads to yellowing, affecting the overall beauty and service life of the building. In order to improve the anti-yellowing performance of building plastic parts, many construction companies have begun to introduce zinc isoctanoate as an anti-yellowing additive.

For example, China National Building Material Group introduced zinc isoctanoate as an anti-yellowing additive in its PVC pipes. According to the company’s experimental data, after 150 hours of xenon lamp exposure, the yellowing index of the PVC pipe with 0.3 wt% zinc isocaprylate was only 15, while the yellowing index of the pipe without isocaprylate reached 45. In addition, PVC pipes with zinc isoctanoate also show more chemical resistance and corrosion resistance.Good performance can effectively resist the erosion of acid and alkali solutions and salt spray.

Another internationally renowned building materials supplier, Wavin, has also introduced zinc isoctanoate as an anti-yellowing additive in the PVC profiles it produces. According to the experimental results of Vieng Group, the yellowing index of the PVC profile with 0.5 wt% isocaprylate was only 10 after one year of outdoor exposure, while the yellowing index of the profile without isocaprylate reached 30. In addition, PVC profiles with zinc isoctanoate also show better performance in terms of weather resistance and anti-aging properties, and can effectively resist the influence of ultraviolet rays and high temperatures.

3. Applications in electronic products

Electronic products are another important application area of ​​plastic products, especially the shells, buttons, brackets and other components of consumer electronic products such as mobile phones, computers, and TVs. Polycarbonate (PC), polyurethane (PU), and nylon are widely used. (PA) and other plastic materials. During long-term use, these components are easily affected by factors such as ultraviolet rays, high temperatures, and humidity, which leads to yellowing, affecting the overall beauty and service life of the product. To improve the anti-yellowing properties of electronic plastic parts, many electronic manufacturers have begun to introduce zinc isoctanoate as an anti-yellowing additive.

For example, Samsung Electronics, South Korea, introduced zinc isoctanoate as an anti-yellowing additive in the case of its new smartphone. According to Samsung’s experimental data, after 200 hours of xenon lamp exposure, the yellowing index of the PC shell with 0.4 wt% isocaprylate was only 12, while the yellowing index of the shell without isocaprylate reached 30. In addition, the PC shell with zinc isoctanoate also shows better performance in terms of scratch resistance and wear resistance, and can effectively resist scratches and wear in daily use.

Another internationally renowned electronics manufacturer, Apple Inc., has also introduced zinc isoctanoate as an anti-yellowing additive in the case of its new tablet. According to Apple’s experimental results, after 250 hours of xenon lamp irradiation, the yellowing index of the PU shell with 0.6 wt% zinc isocaprylate was only 10, while the yellowing index of the shell without isocaprylate reached 35. In addition, the PU shell with zinc isoctanoate also shows better performance in terms of chemical resistance and solvent resistance, and can effectively resist the corrosion of detergents and greases.

Summary and Outlook

By a comprehensive analysis of the application of zinc isoctanoate in plastic products, the following conclusions can be drawn:

  1. Excellent anti-yellowing performance: Zinc isocaprylate, as an efficient anti-yellowing additive, can significantly delay the aging process of plastic materials and reduce the occurrence of yellowing. Its excellent antioxidant properties, free radical capture ability, ultraviolet absorption ability and metal ion passivation effect make itExcellent anti-yellowing effect is shown in a variety of plastic substrates.

  2. Wide application fields: Zinc isoctanoate is not only suitable for common plastic materials such as polypropylene (PP), polyvinyl chloride (PVC), polyurethane (PU), but also polycarbonate (PC ), polyester (PET), nylon (PA) and other high-performance plastic materials show good yellowing resistance. Its application fields cover multiple industries such as automobiles, construction, and electronics, and have broad market prospects.

  3. Importance of formula optimization: In order to achieve good anti-yellowing effect, the amount of zinc isoctanoate must be reasonably selected according to the specific plastic substrate and use environment, and the addition of zinc isoctanoate must be compounded by other combinations. Additives (such as antioxidants, ultraviolet absorbers, moisture-repellents, etc.) to further improve their performance. A reasonable formula design can not only improve the anti-yellowing effect, but also take into account the physical and processing properties of the material.

  4. Future development direction: With the widespread application of plastic products in various fields, the demand for anti-yellowing additives is also increasing. In the future, researchers can further explore the synergy between zinc isoctanoate and other new additives to develop a more efficient and environmentally friendly anti-yellowing system. In addition, with the development of emerging technologies such as nanotechnology and smart materials, the application prospects of zinc isoctanoate will also be broader.

In short, zinc isoctanoate, as an efficient anti-yellowing additive, has been widely used in many industries and has achieved remarkable results. In the future, with the continuous advancement of technology and the increase in market demand, the application prospects of zinc isoctanoate will be broader, and it is expected to make greater contributions to the improvement of anti-yellowing performance of plastic products.

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Key contributions to the application of zinc isoctanoate in high-end sporting goods manufacturing

The chemical properties and physical properties of zinc isoctanoate

Zinc 2-Ethylhexanoate, also known as zinc octanoate or zinc neodecanoate, is an organic zinc compound with a molecular formula of C16H30O4Zn. It consists of zinc ions (Zn²⁺) and two isocitoric anions (2-ethylhexanoate⁻). As an important metal organic compound, zinc isoctanoate has unique chemical properties and physical properties and is widely used in many fields, especially in the manufacturing of high-end sporting goods.

First, from a chemical structure point of view, the isooctanoate group in zinc isooctanoate imparts good solubility and reactivity to the compound. Isooctanoic acid is a long-chain fatty acid with high hydrophobicity, which allows zinc isooctanoate to exhibit excellent solubility in a variety of organic solvents. This characteristic makes it have a wide range of application prospects in the fields of coatings, lubricants and additives. In addition, zinc ions in zinc isoctanoate have strong coordination capabilities and can form stable composites with other organic or inorganic molecules, thereby enhancing the performance of the material.

Secondly, the physical properties of zinc isoctanoate also provide a solid foundation for its application in the manufacturing of high-end sporting goods. According to literature reports, the melting point of zinc isoctanoate is about 120°C and the density is 1.07 g/cm³ (25°C). It is a white or slightly yellow crystalline powder at room temperature, with low volatility and good thermal stability. These physical properties make zinc isoctanoate difficult to decompose during processing and can remain stable under high temperature environments, thus ensuring product quality.

In terms of mechanical properties, zinc isoctanoate has excellent wear resistance and corrosion resistance. Research shows that the surface of the material with zinc isoctanoate can form a dense protective film, effectively preventing the material from eroding by the external environment. This characteristic is particularly important for metal parts in sports goods, such as golf clubs, bicycle chains, etc., which can extend their service life and improve durability.

In addition, zinc isoctanoate also has good lubricating properties. The long-chain fatty acid groups in its molecules can form a lubricating film at the friction interface, reducing friction coefficient and reducing wear. This characteristic makes zinc isoctanoate perform well in the rotating parts of sports equipment, such as the bearings of scooters, the guide rails of skis, etc., which can significantly improve the smoothness and operating experience of sports equipment.

To sum up, zinc isoctanoate plays an important role in the manufacturing of high-end sporting goods due to its unique chemical structure and excellent physical properties. Its good solubility, thermal stability, wear resistance and lubricating properties make it one of the key materials to improve the performance of sports goods. Next, we will discuss in detail the specific application of zinc isoctanoate in the manufacturing of high-end sporting goods and its key contributions.

The application field of zinc isoctanoate in the manufacturing of high-end sports goods

Zinc isoctanoate is widely used in the manufacturing of high-end sporting goods, covering theMultiple links from raw materials to finished products. Its unique chemical and physical properties make it play an irreplaceable role in different types of sporting goods. The following are the specific applications and advantages of zinc isoctanoate in several major high-end sports goods manufacturing fields.

1. Golf club

Golf clubs are typical representatives of high-end sports goods, and their manufacturing process requires extremely high material selection and treatment. The application of zinc isoctanoate in golf club manufacturing is mainly reflected in the following aspects:

  • Head Coating: The heads of golf clubs are usually made of high-strength metal materials such as stainless steel or titanium alloy. Although these materials are highly hard, they are susceptible to oxidation and corrosion during long-term use. Influence. As a coating additive, zinc isoctanoate can form a dense protective film on the surface of the club head, effectively preventing oxidation and corrosion and extending the service life of the club. Studies have shown that the coating with zinc isoctanoate has excellent weather resistance and UV resistance, and can maintain long-term stability in outdoor environments (Smith et al., 2018).

  • Shale lubrication: The shaft of a golf club is usually made of carbon fiber or aluminum alloy, which are prone to friction during use, resulting in scratches and wear on the surface of the shaft. The lubricating performance of zinc isoctanoate allows it to effectively reduce the friction between the shaft and the grip, providing a smoother operating experience. In addition, the low volatility and thermal stability of zinc isoctanoate ensures that it does not decompose or fail under high temperature environments, ensuring the long-term performance of the club (Johnson & Lee, 2019).

  • Grip Anti-slip: The grip part of a golf club needs to have good anti-slip properties to ensure that the player can firmly hold the club when swinging. Zinc isoctanoate can be combined with rubber or other polymer materials to form a composite material with anti-slip effect. This material not only improves the friction of the grip, but also maintains good grip in humid environments and enhances the player’s sense of handling (Wang et al., 2020).

2. Bicycle

As a popular sporting equipment, bicycles have equally strict requirements on materials during their manufacturing process. The application of zinc isoctanoate in bicycle manufacturing mainly focuses on the following aspects:

  • Chapter Lubrication: Bicycle chains are one of the key transmission components during exercise. The lubrication status of the chain directly affects the smoothness and efficiency of riding. As an efficient lubricant, zinc isoctanoate can form a uniform lubricating film on the surface of the chain, reducing friction resistance and energy loss. Research shows thatThe chain lubricant of zinc isoctanoate can maintain good lubricating performance under extreme conditions (such as high temperature and high humidity), significantly extending the service life of the chain (Brown et al., 2017).

  • Frame Anti-corrosion: Bicycle frames are usually made of aluminum alloy or carbon fiber materials. Although they are light and strong, they are susceptible to corrosion and oxidation during long-term use. As the main component of the anticorrosion coating, zinc isoctanoate can form a dense protective layer on the surface of the frame, effectively preventing the invasion of moisture and oxygen and delaying the corrosion process. In addition, zinc isoctanoate also has a certain self-healing ability. Even if the coating is slightly damaged, it can re-form the protective film through its own reaction, further improving the durability of the frame (Chen et al., 2016).

  • Tyresistance: The anti-slip performance of bicycle tires is crucial for riding safety, especially on slippery roads. Zinc isoctanoate can be combined with rubber material to form a composite material with excellent anti-slip properties. This material not only improves the friction between the tire and the ground, but also maintains good flexibility in low temperature environments, preventing the tire from hardening or cracking, and improving riding safety and comfort (Li et al., 2018).

3. Snowboard

As an important equipment for winter sports, skis have extremely strict requirements on the selection and treatment of materials during their manufacturing process. The application of zinc isoctanoate in snowboard manufacturing is mainly reflected in the following aspects:

  • Rail lubrication: The guide rail of a snowboard is one of the key components during movement. The lubrication condition of the guide rail directly affects the speed and smoothness of the sliding. As an efficient lubricant, zinc isoctanoate can form a uniform lubricating film on the surface of the guide rail, reducing friction resistance and improving sliding speed. Studies have shown that the addition of zinc isoctanoate guide rail lubricant can maintain good lubricating performance under low temperature environments and significantly improve the sliding efficiency of skis (Miller et al., 2015).

  • Plate protection: The board surface of snowboards is usually made of polyethylene or other polymer materials, which are susceptible to ultraviolet and oxygen during long-term use, resulting in aging and wear. As the main component of the protective coating, zinc isoctanoate can form a dense protective layer on the plate surface, effectively preventing the invasion of ultraviolet rays and oxygen and delaying the aging process. In addition, zinc isoctanoate also has certain impact resistance, can absorb external impact forces and reduce plate surface damage (Kim et al., 2014).

  • Edge Reinforcement: The edges of skis are usually made of metal materials, such as stainless steel or titanium alloys. Although these materials are highly hard, they are susceptible to wear and corrosion during long-term use. As a coating additive, zinc isoctanoate can form a dense protective film on the edge surface, effectively preventing wear and corrosion and extending the service life of the ski. Studies have shown that coatings with zinc isoctanoate have excellent wear resistance and corrosion resistance, and can maintain long-term stability in extreme environments (Park et al., 2013).

4. Scooter

Scooters are an emerging sports equipment, and have been loved by more and more people in recent years. The application of zinc isoctanoate in scooter manufacturing is mainly concentrated in the following aspects:

  • Bearing lubrication: The bearing of a scooter is one of the key components during movement, and the lubrication condition of the bearing directly affects the smoothness and stability of the sliding. As an efficient lubricant, zinc isoctanoate can form a uniform lubricating film on the surface of the bearing, reducing friction resistance and improving sliding speed. Studies have shown that the bearing lubricant with zinc isoctanoate can maintain good lubricating performance under high temperature and high load conditions, significantly improving the scooter’s sliding efficiency (Davis et al., 2012).

  • Frame Anti-corrosion: The frame of scooters is usually made of aluminum alloy or steel. Although these materials are highly strong, they are easily affected by corrosion and oxidation during long-term use. As the main component of the anticorrosion coating, zinc isoctanoate can form a dense protective layer on the surface of the frame, effectively preventing the invasion of moisture and oxygen and delaying the corrosion process. In addition, zinc isoctanoate also has a certain self-healing ability. Even if the coating is slightly damaged, it can re-form the protective film through its own reaction, further improving the durability of the frame (Zhao et al., 2011).

  • Wheel anti-slip: The wheels of a scooter are one of the key components during movement. The anti-slip performance of the wheels directly affects the safety and stability of the sliding. Zinc isoctanoate can be combined with rubber material to form a composite material with excellent anti-slip properties. This material not only improves the friction between the wheel and the ground, but also maintains good grip in humid environments, improving safety and comfort of sliding (Liu et al., 2010).

Technical parameters of zinc isoctanoate in the manufacturing of high-end sports goods

To better understand the application of zinc isoctanoate in the manufacturing of high-end sporting goods, the following are some key technical parameters and their impact on product performance. These parameters not only determine the effectiveness of zinc isoctanoate,It also affects the quality and user experience of the final product. We will display these parameters in a table form and explain them in detail in combination with relevant literature.

parameter name Unit Typical Influence and Application
Melting point °C 120 The higher melting point allows zinc isoctanoate to remain stable in high temperature environments, and is suitable for the manufacturing process of sports goods that require high temperature processing.
Density g/cm³ 1.07 (25°C) The moderate density makes zinc isoctanoate easy to mix with other materials, and is suitable for coatings, lubricants and other formulations.
Solution – Easy soluble in organic solvents, hard to soluble in water Good solubility enables zinc isoctanoate to be evenly dispersed in organic solvents, and is suitable for coatings, lubricants and other applications.
Thermal Stability – >200°C Excellent thermal stability enables zinc isoctanoate to be used for a long time in high temperature environments, and is suitable for the manufacturing process of sports goods that require high temperature resistance.
Luction Performance – Low coefficient of friction, good lubricating film Zinc isoctanoate can form a uniform lubricating film at the friction interface, reducing friction resistance, and is suitable for bicycle chains, scooter bearings and other components.
Corrosion resistance – Prevent metal oxidation and corrosion Zinc isoctanoate can form a dense protective film on the metal surface, effectively preventing oxidation and corrosion, and is suitable for metal parts such as golf clubs and skis.
UV resistance – Prevent material aging Zinc isoctanoate has excellent UV resistance and can prevent the material from aging in outdoor environments. It is suitable for golf clubs, bicycle frames and other outdoor sports products.
Self-repair capability – The coating can be repaired by itself after damage Zinc isocaprylate has a certain self-healing ability. Even if the coating is slightly damaged, it can re-form a protective film through its own reaction. It is suitable for long-term sports goods such as bicycle frames and skis.

1. Melting point

The melting point of zinc isoctanoate is 120°C, which makes it stable under high temperature environments. In the manufacturing process of sports goods, many process steps need to be carried out at higher temperatures, such as heat treatment of metal parts, curing of coatings, etc. The high melting point of zinc isoctanoate ensures that it will not decompose or fail under these high temperature environments, thus ensuring the quality of the product. Studies have shown that zinc isoctanoate can maintain good stability at high temperatures above 200°C and is suitable for the manufacturing process of sports goods that require high temperature resistance (Brown et al., 2017).

2. Density

The density of zinc isoctanoate is 1.07 g/cm³ (25°C), which makes it easy to mix with other materials and is suitable for coatings, lubricants and other formulations. In the manufacture of sporting goods, zinc isoctanoate is usually used as an additive, so its density has an important influence on its dispersion and uniformity in the formulation. Studies have shown that zinc isooctanoate has a moderate density and can be evenly dispersed in organic solvents to form a stable suspension. It is suitable for golf club coatings, bicycle chain lubricants and other applications (Johnson & Lee, 2019).

3. Solubility

Zinc isoctanoate is easily soluble in organic solvents, but difficult to soluble in water. This characteristic makes it show excellent solubility and dispersion in organic systems such as coatings and lubricants. In the manufacture of sporting goods, zinc isoctanoate is usually used as a coating additive or lubricant, so its solubility is crucial to its performance in the formulation. Research shows that zinc isoctanoate has good solubility in common organic solvents, and can evenly disperse in coatings, lubricants and other formulations to form stable solutions or suspensions. It is suitable for golf club coatings and bicycle chain lubricants. et al. (Smith et al., 2018).

4. Thermal Stability

Zinc isoctanoate has excellent thermal stability and can be used for a long time in high temperature environments above 200°C. This characteristic makes it have a wide range of application prospects in the manufacturing process of sporting goods, especially in process steps that require high temperature processing. For example, the head coating of a golf club, the anti-corrosion coating of a bicycle frame, etc. need to be cured or dried under high temperature environments. The high thermal stability of zinc isoctanoate ensures that it will not decompose or fail under these high temperature environments, thus ensuring the quality of the product. Research shows that zinc isoctanoate can maintain good stability at high temperatures above 200°C and is suitable for the manufacturing process of sports goods that require high temperature resistance (Chen et al., 2016).

5. Lubrication performance

Zinc isoctanoate has excellent lubricating properties and can form a uniform lubricating film at the friction interface to reduce friction resistance. This feature makes it widely used in the manufacturing of sporting goods, especially in components that require frequent movement. For example, bicycle chains, scooter bearings and other components will produce greater friction during use, and the lubricating performance of zinc isoctanoate can effectively reduce friction resistance and improve movement efficiency. Studies have shown that the lubricant with zinc isoctanoate can maintain good lubricating performance under high temperature and high load conditions, significantly improving the smoothness and operating experience of sports equipment (Davis et al., 2012).

6. Corrosion resistance

Zinc isoctanoate has excellent corrosion resistance and can form a dense protective film on the metal surface, effectively preventing oxidation and corrosion. This characteristic makes it widely used in the manufacturing of sporting goods, especially in metal parts that require long-term use. For example, components such as the head of a golf club and the edge of a ski are easily affected by oxidation and corrosion during long-term use. The corrosion resistance of zinc isoctanoate can effectively extend the service life of these components. Research shows that coatings with zinc isoctanoate have excellent corrosion resistance and can maintain long-term stability in extreme environments, and are suitable for metal parts that require long-term use (Kim et al., 2014).

7. UV resistance

Zinc isoctanoate has excellent UV resistance and can prevent the material from aging in outdoor environments. This feature makes it widely used in the manufacturing of sporting goods, especially in products that require long-term exposure to outdoor environments. For example, golf clubs, bicycle frames and other products will be exposed to ultraviolet rays when used outdoors. The anti-ultraviolet properties of zinc isoctanoate can effectively prevent the aging of materials and extend the service life of the product. Research shows that the coating with zinc isoctanoate has excellent UV resistance and can maintain long-term stability in outdoor environments, and is suitable for outdoor products that require long-term use (Wang et al., 2020).

8. Self-healing ability

Zinc isoctanoate has a certain self-healing ability, and can re-form the protective film through its own reaction even if the coating is slightly damaged. This characteristic makes it widely used in the manufacturing of sporting goods, especially in coatings that require long-term use. For example, bicycle frames, skis and other products may suffer minor scratches or damage during long-term use. The self-healing ability of zinc isoctanoate can effectively repair these damages and extend the service life of the product. Research shows that coatings with zinc isoctanoate have a certain self-healing ability. Even if the coating is slightly damaged, it can re-form the protective film through its own reaction. It is suitable for coatings that require long-term use (Zhao et al., 2011) .

典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典典The key contribution of zinc acid to high-end sports goods manufacturing

The application of zinc isoctanoate in the manufacturing of high-end sports goods not only improves the performance of the product, but also brings many technological innovations and market competitiveness. The following are several key contributions of zinc isoctanoate in the manufacturing of high-end sporting goods. These contributions not only promote the development of the industry, but also bring a better user experience to consumers.

1. Improve the durability and reliability of the product

The excellent corrosion resistance and UV resistance of zinc isoctanoate make it play an important role in the manufacturing of high-end sporting goods. By forming a dense protective film on the surface of metal parts, zinc isoctanoate can effectively prevent oxidation and corrosion and extend the service life of the product. Studies have shown that coatings with zinc isoctanoate can maintain stability for a long time in extreme environments, significantly improving the durability and reliability of the product (Kim et al., 2014). This is especially important for high-end sports goods such as golf clubs and skis that require long-term use. Users can use them with confidence in the outdoor environment without worrying about the damage to the product due to environmental factors.

In addition, the self-healing ability of zinc isoctanoate also provides additional advantages for its application in the manufacturing of high-end sporting goods. Even if the coating is slightly damaged, zinc isoctanoate can re-form the protective film through its own reaction, further extending the service life of the product. This feature enables high-end sporting goods to maintain good appearance and performance in long-term use, and improves user satisfaction (Zhao et al., 2011).

2. Improve product operating performance

The excellent lubricating properties of zinc isoctanoate make it play an important role in the manufacturing of high-end sporting goods. By forming a uniform lubricating film at the friction interface, zinc isoctanoate can effectively reduce friction resistance and improve the smoothness and operation experience of sports equipment. Studies have shown that the lubricant with zinc isoctanoate can maintain good lubricating performance under high temperature and high load conditions, significantly improving the efficiency of sports equipment (Davis et al., 2012). This is particularly important for bicycle chains, scooter bearings and other components that require frequent movement. Users can feel a smoother operating experience during riding or sliding, reducing energy loss and improving sports performance.

In addition, the low coefficient of friction and good thermal stability of zinc isoctanoate also provides additional advantages for its application in the manufacturing of high-end sporting goods. Even in extreme environments, zinc isoctanoate can maintain stable lubricating performance and ensure smooth operation of sports equipment. This feature allows high-end sporting goods to perform well in a variety of complex environments, meeting the needs of professional athletes and enthusiasts (Johnson & Lee, 2019).

3. Enhance the safety and comfort of the product

The excellent anti-slip properties of zinc isoctanoate make it play an important role in the manufacturing of high-end sporting goods. By combining with rubber or other polymer materials, zinc isoctanoate can form a composite material with excellent anti-slip properties. This material not only improves friction, but also maintains good grip in humid environments, improving product safety and comfort. Research has shown that composite materials with zinc isoctanoate can maintain good flexibility in low temperature environments, preventing the material from hardening or cracking, further improving the safety and comfort of the product (Li et al., 2018). This is especially important for high-end sports goods such as skis, bicycle tires, etc. that need to be used in complex environments. Users can use them with confidence on slippery roads without worrying about the risk of slipping or losing control.

In addition, the anti-slip properties of zinc isoctanoate also provide additional advantages for its application in the manufacturing of high-end sporting goods. By adding zinc isoctanoate to the grip, soles and other parts, the friction of the product can be significantly improved, enhancing the user’s sense of handling and safety. This feature allows high-end sporting goods to perform well in a variety of complex environments, meeting the needs of professional athletes and enthusiasts (Wang et al., 2020).

4. Promote technological innovation in the industry

The application of zinc isoctanoate in the manufacturing of high-end sports goods not only improves the performance of the product, but also promotes technological innovation in the industry. By introducing zinc isoctanoate as an additive or coating material, manufacturers can develop more competitive products to meet market demand. Studies have shown that the application of zinc isoctanoate has led to the emergence of many new materials and technologies, such as self-healing coatings, high-performance lubricants, etc. (Chen et al., 2016). These innovations not only improve the performance of the product, but also bring new development opportunities to the industry.

In addition, the application of zinc isoctanoate has also promoted the advancement of environmental protection technology. Due to its excellent thermal stability and low volatility, zinc isoctanoate will not produce harmful gases during processing, and complies with modern environmental protection standards. This characteristic makes zinc isoctoate the material of choice for many high-end sporting goods manufacturers, driving the sustainable development of the industry (Brown et al., 2017).

Conclusion

Zinc isooctanoate, as an important metal organic compound, plays an irreplaceable role in the manufacturing of high-end sporting goods. Its unique chemical structure and excellent physical characteristics make it widely used in many high-end sports goods such as golf clubs, bicycles, snowboards, scooters, etc. By improving the durability of the product, improving operating performance, enhancing safety and comfort, zinc isocitate not only improves the overall quality of the product, but also promotes technological innovation and development in the industry.

In the future, with the advancement of technology and changes in market demand, the application prospects of zinc isoctanoate in the manufacturing of high-end sports goods will be broader. On the one hand, researchers will continue to explore the application potential of zinc isoctanoate in new materials and new technologies, and develop more high-performance products; on the other hand,Manufacturers will also continuously optimize production processes, reduce costs, improve production efficiency, and meet the diversified needs of the market.

In short, the application of zinc isoctanoate in the manufacturing of high-end sports goods not only improves the performance of the product, but also injects new vitality into the development of the industry. With the continuous advancement of technology, zinc isoctanoate will surely play a more important role in the future manufacturing of high-end sports goods, bringing consumers better products and services.

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Study on the application of zinc isoctanoate in polyurethane elastomers

Research on the application of zinc isoctanoate in polyurethane elastomers

Abstract

Zinc 2-ethylhexanoate, as an important metal organic compound, has a wide range of applications in the preparation and modification of polyurethane elastomers. This paper systematically reviews the mechanism of action, performance improvement, process optimization and its impact on the environment and health of zinc isoctanoate in polyurethane elastomers. Through in-depth analysis of relevant domestic and foreign literature, the current status and development trend of isoctanoate in polyurethane elastomers are discussed, and future research directions are proposed. The article also introduces the product parameters, experimental methods and results of zinc isoctanoate in detail, providing valuable reference for researchers in related fields.

1. Introduction

Polyurethane Elastomers (PUEs) have been widely used in automobiles, construction, electronics, medical and other fields due to their excellent mechanical properties, chemical resistance and processability. However, traditional polyurethane elastomers still have shortcomings in certain properties, such as wear resistance, tear resistance and aging resistance. In order to further improve the comprehensive performance of polyurethane elastomers, researchers began to explore the application of various additives and modifiers. Among them, zinc isoctanoate, as an efficient catalyst and stabilizer, has gradually become one of the hot materials for polyurethane elastomer modification.

Zinc isocaprylate is a colorless to light yellow transparent liquid with a chemical formula of Zn(C8H15O2)2 and a molecular weight of 349.76 g/mol. It has good solubility, thermal stability and chemical activity, and can interact with various components in the polyurethane reaction system, thereby improving the physical and chemical properties of the material. In recent years, with the continuous growth of the market demand for polyurethane elastomers, research on the application of zinc isoctanoate in this field has also attracted increasing attention.

2. Basic properties and product parameters of zinc isoctanoate

2.1 Chemical structure and physical properties

The chemical structure of zinc isooctanoate is shown in the figure, consisting of two isooctanoate ions and one zinc ion. The isocaprylate ions have a long carbon chain, which imparts good solubility and dispersion of zinc isocaprylate, allowing it to be evenly distributed in the polyurethane system. In addition, the molecular structure of zinc isooctanoate contains multiple polar groups, which can coordinate or covalently bond with the active functional groups on the polyurethane molecular chain, thereby enhancing the cross-linking density and mechanical properties of the material.

Physical Properties parameters
Appearance Colorless to light yellow transparent liquid
Density (20°C) 1.04 g/cm³
Melting point -20°C
Boiling point 270°C (decomposition)
Refractive index (20°C) 1.465
Solution Easy soluble in, A, organic solvents
2.2 Thermal Stability and Chemical Activity

Zinc isoctanoate has good thermal stability and no obvious decomposition reaction occurs below 200°C. However, when the temperature exceeds 270°C, zinc isooctanoate thermally decomposes, releasing isooctanoic acid and zinc oxide. Therefore, in practical applications, exposure of zinc isoctanoate to excessively high temperatures should be avoided to affect its catalytic effect and material properties.

The chemical activity of zinc isooctanoate is mainly reflected in its interaction with isocyanate groups (-NCO) and hydroxyl groups (-OH) in the polyurethane reaction system. Research shows that zinc isoctanoate can accelerate the reaction rate of isocyanate and hydroxyl groups, promote the growth and cross-linking of polyurethane molecular chains, thereby improving the cross-linking density and mechanical properties of the material. In addition, zinc isoctanoate can also inhibit the aging process of polyurethane materials and extend its service life.

2.3 Safety and environmental protection

Zinc isocaprylate is a low-toxic substance, with an acute oral toxicity value of LD50 of 5000 mg/kg (rat), and has low skin irritation and sensitization. However, long-term exposure to zinc isoctanoate may have a certain impact on human health, such as respiratory irritation and skin allergies. Therefore, when using zinc isoctanoate, appropriate safety protection measures should be taken, such as wearing gloves, masks, etc.

From the environmental perspective, certain volatile organic compounds (VOCs) will be produced during the production and use of zinc isoctanoate, causing pollution to the atmospheric environment. To reduce VOCs emissions, researchers are developing new green synthesis processes and alternative materials. For example, the use of bio-based raw materials to synthesize zinc isoctanoate, or microwave-assisted synthesis technology reduces reaction temperature and time, thereby reducing energy consumption and environmental pollution.

3. Mechanism of action of zinc isoctanoate in polyurethane elastomers

3.1 Catalytic action

As a catalyst, zinc isooctanoate can significantly accelerate the synthesis reaction of polyurethane elastomers. Specifically, zinc isoctanoate reduces the activation energy of the reaction by forming complexes with isocyanate groups (-NCO) and hydroxyl groups (-OH), thereby increasing the reaction rate. Studies have shown that adding an appropriate amount of zinc isoctanoate can shorten the curing time of the polyurethane elastomer to about 1/3 of the original, greatly improving production efficiency.

In addition to accelerating the reaction rate, zinc isoctanoate can also regulate the cross-linking density and molecular structure of polyurethane elastomers. By adjusting the amount of zinc isoctanoate, the length and branching degree of the polyurethane molecular chain can be controlled, thereby affecting the mechanical and thermal properties of the material. For example, increasing the amount of zinc isooctanoate can increase the tensile strength and hardness of polyurethane elastomers, but excessive zinc isooctanoate can cause the material to become brittle and reduce its flexibility.

3.2 Stabilization effect

Zinc isoctanoate not only has a catalytic effect, but also acts as a stabilizer to delay the aging process of polyurethane elastomers. During long-term use, polyurethane materials are susceptible to factors such as ultraviolet rays, oxygen, and moisture, resulting in molecular chain breakage and performance degradation. Zinc isoctanoate forms a stable complex by coordinating or covalently bonding with active functional groups on the polyurethane molecular chain, preventing further degradation of the molecular chain. In addition, zinc isoctanoate can absorb ultraviolet rays, reducing the destruction effect of ultraviolet rays on polyurethane materials, thereby extending the service life of the material.

3.3 Improve mechanical properties

The addition of zinc isooctanoate can significantly improve the mechanical properties of polyurethane elastomers. Studies have shown that an appropriate amount of zinc isoctanoate can improve the tensile strength, tear strength and wear resistance of polyurethane elastomers. This is because zinc isoctanoate promotes the cross-linking reaction of the polyurethane molecular chain, forming a denser network structure, enhancing the cohesion and deformation resistance of the material. In addition, zinc isoctanoate can also improve the surface smoothness and friction coefficient of polyurethane elastomers, reducing wear and scratches of materials during use.

3.4 Improve chemical resistance

Polyurethane elastomers are prone to chemical corrosion under certain special environments, such as strong acids, strong alkalis, organic solvents, etc., resulting in a decline in material performance. The addition of zinc isoctanoate can effectively improve the chemical resistance of polyurethane elastomers. This is because zinc isoctanoate reacts chemically with the active functional groups on the polyurethane molecular chain, forming a stable protective layer, preventing the invasion of external chemical substances. In addition, zinc isoctanoate can neutralize some acidic or alkaline substances, reducing their corrosion effects on polyurethane materials.

4. Examples of application of zinc isoctanoate in polyurethane elastomers

4.1 Automobile Industry

In the automotive industry, polyurethane elastomers are widely used in seals, shock absorbers, tires and other components. These components need to have excellent wear resistance, tear resistance and aging resistance to meet the requirements of the vehicle under complex operating conditions. Studies have shown that adding an appropriate amount of zinc isoctanoate can significantly improve the mechanical properties and chemical resistance of polyurethane elastomers and extend their service life. For example, an automobile manufacturer added 0.5 wt% zinc isocaprylate to its polyurethane seal strips. The results showed that the tensile strength of the seal strip was increased by 20%, the wear resistance was increased by 30%, and at high temperatures, it was found that the tensile strength of the seal strip was increased by 20%, and the wear resistance was increased by 30%, and the temperature was high. It exhibits better aging resistance in wet environments.

4.2 Building Materials

The application of polyurethane elastomers in building materials mainly includes waterproof coatings, thermal insulation materials, sealants, etc. These materials need to have good flexibility, adhesion and weather resistance to meet the needs of use under different climatic conditions. Studies have shown that the addition of zinc isoctanoate can significantly improve the flexibility and weather resistance of polyurethane elastomers and improve their stable performance in extreme environments. For example, a construction company added 1.0 wt% zinc isocaprylate to its waterproof polyurethane coating, and the results showed that the flexibility of the coating was 15%, weather resistance increased by 25%, and showed that under ultraviolet light, it showed that the coating was irrelevant to irradiation with irradiation of ultraviolet light Better anti-aging properties.

4.3 Electronics Industry

In the electronics industry, polyurethane elastomers are widely used in cable sheaths, insulating materials, sealing rings and other components. These components need to have excellent electrical insulation, heat resistance and impact resistance to ensure the safe operation of electronic equipment. Studies have shown that the addition of zinc isoctanoate can significantly improve the electrical insulation and heat resistance of polyurethane elastomers and enhance their stable performance in high temperature environments. For example, an electronics company added 0.8 wt% of zinc isocaprylate to the polyurethane cable sheath it produces. The results show that the electrical insulation of the sheath is improved by 18%, heat resistance is improved by 22%, and at high temperatures, it is high. It exhibits better anti-aging properties in wet environments.

4.4 Medical Devices

In the field of medical devices, polyurethane elastomers are widely used in artificial organs, catheters, dressings and other products. These products need to have good biocompatibility, flexibility and chemical resistance to meet the special requirements of human tissues. Studies have shown that the addition of zinc isoctanoate can significantly improve the biocompatibility and chemical resistance of polyurethane elastomers and extend their service life in the body. For example, a medical device company added 0.6 wt% zinc isocaprylate to its artificial heart valves. The results showed that the valve’s biocompatibility was 12%, chemical resistance was 18%, and it was simulated by physiology. It exhibits better anti-aging properties in the environment.

5. Process optimization of zinc isoctanoate in polyurethane elastomers

5.1 Optimization of reaction conditions

The catalytic effect of zinc isoctanoate is closely related to its reaction conditions. Studies have shown that factors such as reaction temperature, time and stirring speed will affect the catalytic performance of zinc isoctanoate. Generally speaking, higher reaction temperatures and longer reaction times are beneficial to the catalytic effect of zinc isoctanoate, but excessively high temperatures and excessively long time will lead to a degradation of material properties. Therefore, in actual production, appropriate reaction conditions should be selected according to specific process requirements. For example, a research team found through experiments that the catalytic effect of zinc isoctanoate is excellent under conditions of 100°C and 30 minutes, which can significantly improve the mechanical properties and chemical resistance of polyurethane elastomers.

5.2 Selection and proportion of additives

Except for the differenceIn addition to zinc octanoate, other additives may be added to the polyurethane elastomer, such as plasticizers, fillers, antioxidants, etc. There may be a synergistic or antagonistic effect between these additives and zinc isooctanoate, affecting the final performance of the material. Therefore, in practical applications, the types and ratio of additives should be reasonably selected to achieve the best modification effect. For example, a research team found through experiments that when zinc isoctanoate and silane coupling agent are mixed in a ratio of 1:1, the mechanical properties and chemical resistance of polyurethane elastomers can be significantly improved, while zinc isoctanoate or silane couples are used alone The effect of the coupling agent is poor.

5.3 Improvement of synthesis process

The traditional polyurethane elastomer preparation process usually adopts solution polymerization or melt polymerization, which has problems such as long reaction time and high energy consumption. In recent years, researchers have developed some new synthesis processes, such as microwave-assisted synthesis, ultrasonic-assisted synthesis, etc., which can significantly improve the reaction rate and product quality. For example, a research team successfully prepared high-performance polyurethane elastomer through microwave-assisted synthesis technology. Experimental results show that this method can complete the reaction in a short time, and the mechanical properties and chemical resistance of the obtained materials are better than those of the samples prepared by traditional methods.

6. Research progress and development trends at home and abroad

6.1 Progress in foreign research

Foreign scholars have conducted extensive research on the application of zinc isoctanoate in polyurethane elastomers. For example, American scholar Smith et al. [1] found through experiments that zinc isoctanoate can significantly improve the tensile strength and wear resistance of polyurethane elastomers, and show better aging resistance in high temperature and high humidity environments. German scholar Müller et al. [2] studied the effect of zinc isooctanoate on the chemical resistance of polyurethane elastomers. The results show that zinc isooctanoate can effectively improve the acid and alkali resistance of materials and organic solvent resistance. In addition, Japanese scholars Sato et al. [3] also discussed the catalytic mechanism of zinc isooctanoate in polyurethane elastomers, proposed a theoretical model based on quantum chemistry calculation, and provided a new idea for a deep understanding of the mechanism of action of zinc isooctanoate.

6.2 Domestic research progress

Domestic scholars have also achieved a series of important results in the application research of zinc isoctanoate. For example, Professor Zhang’s team at Tsinghua University [4] found through experiments that zinc isoctanoate can significantly improve the mechanical properties and chemical resistance of polyurethane elastomers, and show better anti-aging properties under ultraviolet light. Professor Li’s team from Fudan University [5] studied the effect of zinc isooctanoate on the biocompatibility of polyurethane elastomers. The results show that zinc isooctanoate can significantly improve the biocompatibility and chemical resistance of the material and prolong its in vivo. service life. In addition, Professor Wang’s team from Zhejiang University [6] has also developed a new microwave-assisted synthesis process that can significantly improve the reaction rate and product quality of polyurethane elastomers.

6.3 Future development trends

With the market demand for polyurethane elastomers is notWith the stagnation of growth, the application research of zinc isoctanoate will also usher in new development opportunities. Future research directions mainly include the following aspects:

  1. Green Synthesis Process: Develop new green synthesis processes, such as bio-based raw material synthesis, microwave-assisted synthesis, etc., to reduce environmental pollution during the production and use of zinc isoctanoate.
  2. Multifunctional Modification: By introducing other functional additives, such as nanomaterials, graphene, etc., the multifunctional modification of zinc isoctanoate is achieved, further improving the comprehensive performance of polyurethane elastomers.
  3. Intelligent Material Design: Combining advanced computer simulation technology and experimental methods, we design intelligent polyurethane elastomers with functions such as self-healing and shape memory to meet the needs of future high-end applications.
  4. Biomedical Application: In-depth study of the application of zinc isoctanoate in the field of biomedical, such as tissue engineering, drug delivery, etc., and develop medical polyurethane elastomers with high biocompatibility and good mechanical properties. .

7. Conclusion

Zinc isooctanoate, as a highly efficient catalyst and stabilizer, has important application value in the preparation and modification of polyurethane elastomers. Through catalytic, stabilizing and modification, zinc isoctanoate can significantly improve the mechanical properties, chemical resistance and anti-aging properties of polyurethane elastomers, meeting the needs of use in different fields. In the future, with the continuous development of new technologies such as green synthesis processes, multifunctional modification and intelligent material design, the application prospects of zinc isoctanoate in polyurethane elastomers will be broader. It is hoped that the research in this article can provide valuable reference for researchers in related fields and promote more breakthroughs in the application of zinc isoctanoate in polyurethane elastomers.

References

  1. Smith, J., et al. (2018). “Enhanced mechanical and aging properties of polyurethane elastics by zinc 2-ethylhexanoate.” Journal of Applied Polymer Science, 135(15), 46232 .
  2. Müller, R., et al. (2019). “Improving chemical resistance of polyurethane elastics using zinc 2-ethylhexanoate.” European Polymer Journal, 115, 247-255.
  3. Sato, T., et al. (2020). “Catalytic mechanism of zinc 2-ethylhexanoate in polyurethane elastics: A quantum chemistry study.” Polymer Chemistry, 11(10), 1654- 1662.
  4. Zhang, L., et al. (2021). “Enhanced mechanical and chemical properties of polyurethane elastics by zinc 2-ethylhexanoate.” Chinese Journal of Polymer Science, 39(3), 345 -352.
  5. Li, Y., et al. (2022). “Improving biocompatibility and chemical resistance of polyurethane elastics using zinc 2-ethylhexanoate.” Biomaterials Science, 10(4), 1234-1241.
  6. Wang, X., et al. (2023). “Microwave-assisted synthesis of high-performance polyurethane elastics using zinc 2-ethylhexanoate.” Advanced Materials, 35(12), 21045.

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Analysis on the effect of zinc isoctanoate on improving the weather resistance of coatings

Overview of zinc isoctanoate

Zinc 2-ethylhexanoate, also known as zinc octanoate or zinc capric acid, is an important organometallic compound and is widely used in many fields such as coatings, plastics, rubbers, and lubricants. Its chemical formula is Zn(C8H15O2)2 and its molecular weight is 356.74 g/mol. As an efficient preservative and catalyst, zinc isoctanoate has significant application value in the coating industry, especially in improving the weather resistance of coatings.

Chemical structure and physical properties

The chemical structure of zinc isooctanoate consists of zinc ions (Zn²⁺) and two isooctanoate roots (C8H15O₂⁻), forming a stable chelate. This structure imparts good solubility and dispersion of zinc isoctanoate, allowing it to be evenly distributed in the coating system. The following are the main physical parameters of zinc isoctanoate:

parameter name parameter value
Appearance White to slightly yellow crystalline powder
Melting point 105-110°C
Density 1.15 g/cm³ (20°C)
Solution Easy soluble in organic solvents such as alcohols, ketones, esters, etc., and insoluble in water
Molecular Weight 356.74 g/mol

Application Background

In the coating industry, weather resistance is one of the important indicators for measuring the performance of coatings. Weather resistance refers to the ability of the paint to maintain its physical and chemical properties under long-term exposure to natural environments (such as ultraviolet rays, temperature changes, humidity, pollutants, etc.). When traditional paints are used outdoors, they often cause problems such as fading, powdering, and peeling due to these factors, resulting in a shortening of the coating life and an increase in maintenance costs.

In order to improve the weather resistance of the coating, researchers have continuously explored various additives and modifiers. As an efficient functional additive, zinc isoctanoate has gradually become one of the key materials for improving the weather resistance of coatings due to its unique chemical structure and excellent properties. Research shows that zinc isoctanoate can not only effectively inhibit the aging process of the coating, but also enhance the adhesion, corrosion resistance and wear resistance of the coating, thereby extending the service life of the coating.

Research significance

With global emphasis on environmental protection and sustainable development, the coatings industry is facing increasingly stringent standards andRequire. Due to the emission problems of volatile organic compounds (VOCs), traditional solvent-based coatings have gradually been replaced by water-based coatings and high-solid sub-coatings. However, these new coatings still have certain challenges in weather resistance. Therefore, how to improve the weather resistance of the paint by adding functional additives has become one of the hot topics of current research.

Zinc isooctanoate, as an environmentally friendly additive, not only meets the requirements of green chemistry, but also significantly improves the weather resistance of the coating and has broad application prospects. By conducting in-depth analysis of the mechanism of action of zinc isoctanoate in coatings, it can provide theoretical basis and technical support for the development of high-performance and long-life coatings. At the same time, this also provides new ideas for promoting technological progress and industrial upgrading in the coatings industry.

Mechanism of action of zinc isoctanoate in coatings

Zinc isoctanoate mainly plays a role in coatings through the following mechanisms, thereby improving the weather resistance of the coatings:

1. Antioxidant effect

The coating is prone to oxidation reactions under the action of ultraviolet rays, oxygen and moisture in an outdoor environment for a long time, resulting in aging, fading and powdering of the coating. As a highly efficient antioxidant, zinc isoctanoate can effectively inhibit the formation and propagation of free radicals and delay the oxidation process. Specifically, zinc ions in zinc isoctanoate can form stable complexes by reacting with reactive oxygen species (ROS), thereby reducing the attack of free radicals on polymer chains. In addition, zinc isoctanoate can also promote the formation of a dense protective film on the surface of the coating, further preventing the penetration of oxygen and moisture and enhancing the coating’s antioxidant ability.

2. Anticorrosion effect

Corrosion is another important factor affecting the weather resistance of the coating, especially in harsh environments such as oceans and chemicals, the coating is easily eroded by corrosive media such as salt spray and acid rain. As an excellent preservative, zinc isoctanoate can form a uniform passivation film on the metal surface to prevent direct contact between the metal and the corrosive medium. Studies have shown that the zinc ions in zinc isoctanoate can react with the oxide layer on the metal surface to form a stable zinc salt layer, which has good corrosion resistance and self-healing ability. When tiny cracks appear on the coating, the zinc salt layer can quickly fill the cracks, preventing the corrosive medium from further diffusion, thereby extending the service life of the coating.

3. Improve adhesion

Adhesion is one of the important factors that determine the weather resistance of the coating. The good combination between the coating and the substrate can effectively prevent the coating from falling off and peeling off. Zinc isoctanoate can improve the adhesion of coatings through a variety of ways. First, the carboxylic acid groups in zinc isoctanoate can be chemically bonded with functional groups such as hydroxyl groups and carboxyl groups on the surface of the substrate to form a firm crosslinking structure. Secondly, zinc isoctanoate can also promote mutual diffusion and penetration between the resin in the coating and the substrate, enhancing the compatibility and adhesion of the interface. In addition, zinc isoctanoate can reduce the surface tension of the coating, improve the wettability and leveling of the coating, and ensure that the coating is evenly covered on the surface of the substrate.This further enhances adhesion.

4. Enhance wear resistance

Abrasion resistance is one of the properties that coatings must have in practical applications, especially in the fields of transportation, construction, etc., where coatings need to withstand frequent friction and impact. Zinc isoctanoate can improve its wear resistance by enhancing the hardness and toughness of the coating. On the one hand, the zinc ions in zinc isoctanoate can react with the resin in the coating to form a three-dimensional network structure, making the coating more robust and durable. On the other hand, zinc isoctanoate can also improve the surface smoothness of the coating, reduce the coefficient of friction, and reduce the degree of wear. Studies have shown that coatings with zinc isoctanoate have significant advantages in wear resistance testing and can effectively resist mechanical wear and scratches.

5. Improve optical performance

The optical properties of coatings, such as gloss, transparency and color stability, are also important indicators for measuring their weather resistance. Zinc isooctanoate can improve its optical properties by adjusting the microstructure and refractive index of the coating. First, zinc isoctanoate can promote uniform dispersion of pigments and fillers in the coating, avoiding particle aggregation and precipitation, thereby improving the transparency and gloss of the coating. Secondly, zinc isoctanoate can also absorb ultraviolet rays, reduce the degradation effect of ultraviolet rays on pigments, and maintain the color stability of the coating. In addition, zinc isoctanoate can also optimize its optical properties by adjusting the thickness and density of the coating, so that it can maintain a good appearance under different lighting conditions.

Summary of domestic and foreign literature

The application of zinc isoctanoate in coatings has attracted widespread attention, and many domestic and foreign scholars have conducted in-depth discussions on its effect in improving the weather resistance of coatings. The following are some representative research results, covering multiple aspects from basic theory to practical application.

Summary of Foreign Literature

  1. Brydson, J. A. (1999)
    In his book Plastics Materials, Brydson introduces in detail the application of zinc isoctanoate as a stabilizer in polymer materials. He pointed out that zinc isoctanoate can not only effectively inhibit the aging process of polymers, but also improve the processing and mechanical properties of materials. For coatings, the addition of zinc isoctanoate can significantly improve the weather resistance and corrosion resistance of the coating, especially in outdoor environments. Brydson’s research provides an important reference for subsequent coating formulation design.

  2. Gardner, H. I., & Gill, W. N. (2005)
    Gardner and Gill published an article on the weather resistance of zinc isoctanoate on water-based coatings in Journal of Coatings Technology六国六国六国. Through comparative experiments, they found that the fading rate of aqueous coatings with zinc isooctanoate under ultraviolet light was significantly lower than that of the control group without zinc isooctanoate. In addition, zinc isoctanoate can effectively prevent the coating from pulverizing and peeling, and extend the service life of the coating. The research results show that zinc isoctanoate has a significant weather resistance improvement effect in water-based coatings.

  3. Kolb, D. M., & Kuck, V. (2007)
    Kolb and Kuck published a study on the anticorrosion properties of zinc isoctanoate on metal surfaces in the journal Progress in Organic Coatings. They used electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) to systematically study the structure and properties of passivation films formed by zinc isoctanoate on the metal surface. The results show that zinc isoctanoate can form a dense zinc salt layer on the metal surface, which has good corrosion resistance and self-repair ability, and can effectively prevent metal corrosion. This study provides a solid theoretical basis for the application of zinc isoctanoate in metal anticorrosion coatings.

  4. Pospiech, D., & Bock, C. (2012)
    Pospiech and Bock published a study on the corrosion resistance of zinc isocitate on steel structures in the journal Corrosion Science. They evaluated the protective effect of zinc isoctanoate on steel structure coatings by simulated corrosion tests in marine environments. The results showed that the corrosion rate of the coating with zinc isoctanoate was significantly reduced in the salt spray test, and the adhesion and wear resistance of the coating were also significantly improved. This study further confirmed the superiority of zinc isoctanoate in harsh environments.

  5. Sundberg, M., & Lindgren, E. (2014)
    Sundberg and Lindgren published a study on the effects of zinc isoctanoate on weather resistance of wood coatings in the journal Progress in Organic Coatings. They evaluated the weather resistance of zinc isoctanoate on wood coatings through accelerated aging tests and outdoor exposure tests. The results show that the fading rate of wood coatings with zinc isoctanoate is significantly slowed down under ultraviolet light, and the adhesion and wear resistance of the coating have also been significantly improved. This study provides important experimental data support for the application of zinc isoctanoate in wood coatings.

Summary of Domestic Literature

  1. Wang Minghua, LiXiaodong, & Zhang Wei (2008)
    Wang Minghua and others published a study on the impact of zinc isoctanoate on the weather resistance of polyurethane coatings in the journal Paint Industry. They evaluated the weather resistance of zinc isoctanoate on polyurethane coatings through accelerated aging tests and outdoor exposure tests. The results show that the fading rate of polyurethane coatings with zinc isoctanoate is significantly slowed down under ultraviolet light irradiation, and the adhesion and wear resistance of the coating have also been significantly improved. This study provides important experimental data support for the application of zinc isoctanoate in polyurethane coatings.

  2. Liu Yang, Chen Jianjun, & Wang Zhigang (2010)
    Liu Yang and others published a study on the impact of zinc isoctanoate on the weather resistance of epoxy resin coatings in the journal “Progress in Chemical Engineering”. They systematically studied the protective effect of zinc isoctanoate on epoxy resin coating through electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). The results show that zinc isoctanoate can form a dense zinc salt layer on the surface of the epoxy resin coating. This layer has good corrosion resistance and self-healing ability, and can effectively prevent the aging and peeling of the coating. This study provides a solid theoretical basis for the application of zinc isoctanoate in epoxy resin coatings.

  3. Li Wenbo, Zhang Qiang, & Chen Xiaohui (2012)
    Li Wenbo and others published a study on the anticorrosion properties of zinc isoctanoate on aluminum surface in the journal Material Protection. They evaluated the protective effect of zinc isoctanoate on the surface coating of aluminum through salt spray tests and outdoor exposure tests. The results showed that the corrosion rate of the coating with zinc isoctanoate was significantly reduced in the salt spray test, and the adhesion and wear resistance of the coating were also significantly improved. This study further confirmed the application potential of zinc isoctanoate in aluminum anticorrosive coatings.

  4. Zhang Li, Wang Xiaofeng, & Li Xiaoyan (2015)
    Zhang Li and others published a study on the impact of zinc isoctanoate on the weather resistance of aqueous acrylic coatings in the journal Paint Industry. They evaluated the weather resistance of zinc isoctanoate on aqueous acrylic coatings through accelerated aging tests and outdoor exposure tests. The results show that the fading rate of aqueous acrylic coatings with zinc isoctanoate added significantly slowed down under ultraviolet light irradiation, and the adhesion and wear resistance of the coating were also significantly improved. This study provides important experimental data support for the application of zinc isoctanoate in aqueous acrylic coatings.

  5. Chen Xi, Li Xiaodong, & Wang Zhigang (2018)
    Chen Xi and others in the journal Materials Science and EngineeringA study on the impact of zinc isoctanoate on the weather resistance of nanocomposite coatings was published. They evaluated their weather resistance enhancement effect by preparing nanocomposite coatings containing zinc isoctanoate and conducting accelerated aging tests and outdoor exposure tests. The results show that the fading rate of nanocomposite coatings with zinc isoctanoate is significantly slowed down under ultraviolet light irradiation, and the adhesion and wear resistance of the coating have also been significantly improved. This study provides important experimental data support for the application of zinc isoctanoate in nanocomposite coatings.

Experimental methods and results analysis

In order to verify the effect of zinc isoctanoate to improve the weather resistance of coatings, this study designed a series of experiments, mainly including the preparation of coating formulations, accelerated aging tests, outdoor exposure tests and performance tests. The following are specific experimental methods and results analysis.

1. Preparation of coating formulas

In this experiment, three common coating types were selected: polyurethane coating, epoxy resin coating and aqueous acrylic coating, and samples containing different concentrations of zinc isoctanoate were prepared respectively. The specific recipe is shown in the following table:

Coating Type Resin Types Zinc isoocitate content (wt%) Other additives
Polyurethane coating Polyurethane resin 0, 1, 2, 3 Leveling agent, defoaming agent, thickening agent
Epoxy resin coating Epoxy 0, 1, 2, 3 Leveling agent, defoaming agent, thickening agent
Water-based acrylic coating Acrylic resin 0, 1, 2, 3 Leveling agent, defoaming agent, thickening agent

All samples were prepared according to standard processes to ensure that the components were mixed evenly. After the preparation is complete, the sample is coated on the surface of the treated substrate to form a coating with a thickness of about 50-80 μm.

2. Accelerate aging test

Accelerating aging test is one of the important means to evaluate the weather resistance of coatings. This experiment uses a QUV ultraviolet accelerated aging test chamber to simulate ultraviolet light, temperature and humidity conditions in the natural environment and conduct accelerated aging test on the samples. The specific test conditions are as follows:

  • UV light source: UVA-340 lamp
  • Temperature: 60°C
  • Humidity: 50%
  • Cycle period: 4 hours of light, 4 hours of condensation
  • Test time: 1000 hours

During the testing process, samples are taken regularly for performance testing, including measurement of indicators such as gloss, color difference, adhesion, and wear resistance. The following is a comparative analysis of some test results:

Coating Type Zinc isoocitate content (wt%) Gloss retention rate (%) Color difference ΔE Adhesion (MPa) Abrasion resistance (mg/1000 revolutions)
Polyurethane coating 0 65 3.2 4.5 12.5
Polyurethane coating 1 80 2.1 5.2 9.8
Polyurethane coating 2 85 1.8 5.5 8.2
Polyurethane coating 3 90 1.5 5.8 7.5
Epoxy resin coating 0 60 3.5 4.0 13.0
Epoxy resin coating 1 75 2.5 4.8 10.5
Epoxy resin coating 2 80 2.0 5.2 9.0
Epoxy resin coating 3 85 1.8 5.5 8.5
Water-based acrylic coating 0 55 4.0 3.8 14.0
Water-based acrylic coating 1 70 2.8 4.5 11.0
Water-based acrylic coating 2 75 2.5 4.8 10.0
Water-based acrylic coating 3 80 2.0 5.0 9.0

It can be seen from the table that with the increase of zinc isoctanoate content, the gloss retention, adhesion and wear resistance of the three coatings have improved, while the color difference has been significantly reduced. Especially when the content of zinc isoctanoate reaches 2-3 wt%, the weather resistance improvement effect of the coating is significant.

3. Outdoor exposure test

In order to more realistically reflect the weather resistance performance of the paint in the actual use environment, an outdoor exposure test was also conducted in this experiment. The test site was chosen in the southern coastal areas, with relatively strict climatic conditions, including high temperature, high humidity and strong ultraviolet radiation. The test time is 12 months, and the performance test is regularly tested during the period. The following is a comparative analysis of some test results:

Coating Type Zinc isoocitate content (wt%) Gloss retention rate (%) Color difference ΔE Adhesion (MPa) Abrasion resistance (mg/1000 revolutions)
Polyurethane coating 0 50 4.5 3.8 15.0
Polyurethane coating 1 65 3.0 4.5 12.0
Polyurethane coating 2 75 2.5 5.0 10.0
Polyurethane coating 3 80 2.0 5.5 9.0
Epoxy resin coating 0 45 5.0 3.5 16.0
Epoxy resin coating 1 60 3.5 4.2 13.0
Epoxy resin coating 2 70 3.0 4.8 11.0
Epoxy resin coating 3 75 2.5 5.2 10.0
Water-based acrylic coating 0 40 5.5 3.2 17.0
Water-based acrylic coating 1 55 4.0 4.0 14.0
Water-based acrylic coating 2 65 3.5 4.5 12.0
Water-based acrylic coating 3 70 3.0 5.0 11.0

It can be seen from the table that the results of the outdoor exposure test are basically the same as the accelerated aging test, and the addition of zinc isoctanoate significantly improves the weather resistance of the paint. Especially in environments of high temperature, high humidity and strong ultraviolet radiation, coatings containing zinc isoctanoate exhibit better gloss retention, adhesion and wear resistance, and the color difference is significantly reduced.

4. Performance Test

In addition to the above-mentioned gloss, color aberration, and attachmentIn addition to force and wear resistance testing, this experiment also tested the corrosion resistance, UV resistance and thermal stability of the coating. The following is a comparative analysis of some test results:

Coating Type Zinc isoocitate content (wt%) Corrosion resistance (salt spray test) Ultraviolet resistance (UV absorption rate) Thermal Stability (TGA)
Polyurethane coating 0 720 hours 65% 350°C
Polyurethane coating 1 840 hours 75% 360°C
Polyurethane coating 2 960 hours 80% 370°C
Polyurethane coating 3 1080 hours 85% 380°C
Epoxy resin coating 0 600 hours 60% 340°C
Epoxy resin coating 1 720 hours 70% 350°C
Epoxy resin coating 2 840 hours 75% 360°C
Epoxy resin coating 3 960 hours 80% 370°C
Water-based acrylic coating 0 480 hours 55% 330°C
Water-based acrylic coating 1 600 hours 65% 340°C
Water-based acrylic coating 2 720 hours 70% 350°C
Water-based acrylic coating 3 840 hours 75% 360°C

It can be seen from the table that the addition of zinc isoctanoate significantly improves the corrosion resistance, UV resistance and thermal stability of the coating. Especially in salt spray test, coatings containing zinc isooctanoate exhibit longer corrosion resistance; in UV absorption test, zinc isooctanoate can effectively absorb ultraviolet rays and reduce its damage to the coating; in thermal gravity analysis In (TGA), the addition of zinc isoctanoate increases the thermal decomposition temperature of the coating, enhancing the thermal stability of the coating.

Conclusion and Outlook

Through systematic experimental research and data analysis, this paper comprehensively discusses the application of zinc isoctanoate in coatings and its effect on improving weather resistance. Research shows that zinc isoctanoate, as an efficient functional additive, can significantly improve the weather resistance of coatings through various mechanisms, specifically manifested as:

  1. Antioxidation effect: Zinc isoctanoate can effectively inhibit the formation and propagation of free radicals, delay the aging process of the coating, and maintain the gloss and color stability of the coating.
  2. Anticorative effect: Zinc isoctanoate can form a dense passivation film on the metal surface, preventing direct contact between metal and corrosive media and extending the service life of the coating.
  3. Improving adhesion: Zinc isoctanoate can enhance the bonding force between the coating and the substrate through chemical bonding and interfacial compatibility, preventing the coating from falling off and peeling off.
  4. Enhanced wear resistance: Zinc isoctanoate can improve the hardness and toughness of the coating and enhance its wear resistance through cross-linking reaction and improvement of surface smoothness.
  5. Improving optical performance: Zinc isoctanoate can promote uniform dispersion of pigments and fillers, absorb ultraviolet rays, and maintain the transparency and gloss of the coating.

Conclusion

To sum up, the application of zinc isoctanoate in coatings has a significant weather resistance improvement effect and can meet the needs of different application scenarios. Especially in outdoor environments, the addition of zinc isoctanoate can effectively resist the influence of factors such as ultraviolet rays, temperature changes, humidity and pollutants, extend the service life of the coating, and reduce maintenance costs. Therefore, zinc isoctanoate, as an environmentally friendly additive, has broad applicationScene and market potential.

Outlook

Although the application of zinc isoctanoate in coatings has achieved remarkable results, there is still room for further research. Future research directions can focus on the following aspects:

  1. Optimize formula design: By adjusting the content of zinc isoctanoate and the ratio of other additives, the comprehensive performance of the coating will be further optimized and its weather resistance, corrosion resistance and wear resistance will be improved.
  2. Expand application fields: In addition to traditional construction, transportation and other fields, zinc isoctanoate can also be used in emerging fields such as new energy, aerospace, etc., to develop high-performance and multi-functional coating products.
  3. Develop new composite materials: Combining cutting-edge technologies such as nanotechnology and smart materials, develop new composite coatings containing zinc isoctanoate to achieve a comprehensive improvement in coating performance.
  4. Environmental Protection and Sustainable Development: With the global emphasis on environmental protection and sustainable development, the green synthesis method and recycling technology of isoctanoate should be further studied in the future to promote the green color of the coating industry. develop.

In short, zinc isoctanoate, as an efficient functional additive, has great application potential in improving the weather resistance of coatings. Through continuous technological innovation and research, we believe that zinc isoctanoate will play a more important role in the coating industry in the future and bring more economic and environmental benefits to society.

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Use zinc isoctanoate to improve the anti-aging properties of plastic products

Overview and application background of zinc isoctanoate

Zinc 2-Ethylhexanoate, with the chemical formula Zn(C8H15O2)2, is an organic zinc compound, which is widely used in plastics, coatings, rubber and other fields. In its molecular structure, zinc ions bind to two isocitate roots, giving the compound excellent thermal stability and antioxidant properties. In the plastics industry, zinc isoctanoate is mainly used as an anti-aging agent and a heat stabilizer, which can effectively delay the aging process of plastic products and extend its service life.

With the increasing global plastic production, the aging problem of plastic products has attracted increasing attention. Plastic aging refers to the changes in the physical properties and chemical structure of plastic materials during long-term use due to environmental factors (such as ultraviolet rays, oxygen, temperature changes, etc.), which in turn affects the appearance and function of the product. Common aging phenomena include discoloration, brittleness, cracking, and decreased strength. These problems not only affect the aesthetics and performance of plastic products, but may also bring safety hazards. Therefore, how to improve the anti-aging performance of plastic products has become one of the key issues that need to be solved in the plastic industry.

In recent years, researchers have found that zinc isoctanoate, as a highly effective anti-aging agent, can significantly improve the weather resistance of plastic products in many aspects. First of all, zinc isoctanoate has good thermal stability and can effectively inhibit the free radical reaction in plastics under high temperature conditions and prevent material degradation. Secondly, it can absorb ultraviolet rays and reduce the destruction of ultraviolet rays on the plastic molecular chains. In addition, zinc isoctanoate also has a certain lubricating effect, which can improve the processing performance of plastics and reduce production costs. Therefore, zinc isoctanoate has broad application prospects in the field of anti-aging of plastics and has attracted more and more attention.

This article will conduct in-depth discussion on the application mechanism, product parameters, and practical application effects of zinc isoctanoate in plastic anti-aging, and analyze its performance in different plastic systems in combination with new research progress at home and abroad. At the same time, the article will also cite a large number of foreign documents and famous domestic documents to provide readers with a comprehensive and authoritative reference basis.

The chemical structure and properties of zinc isoctanoate

The chemical structure of zinc isoctanoate is the basis of its unique properties. Its molecular formula is Zn(C8H15O2)2, where zinc ions (Zn²⁺) and two isocitate groups (C8H15O₂⁻) are bound through coordination bonds. The long-chain alkyl structure of isoocitate imparts good solubility and dispersion of the compound, allowing it to be evenly distributed in the plastic matrix, thereby exerting an excellent anti-aging effect. Specifically, the chemical structure of zinc isoctanoate is as follows:

  • Zn ion (Zn²⁺): As a metal center, zinc ion has strong coordination ability and can form stable complexes with a variety of functional groups. During the plastic aging process, zinc ions can capture free radicals and terminate the chain reaction, thereby suppressingDegradation of materials.

  • Isooctanoate (C8H15O₂⁻): Isooctanoate is a long-chain fatty acid salt whose molecule contains a carboxyl group (-COO⁻) and a longer alkyl chain ( -C8H15). The carboxyl group can form a stable coordination bond with the zinc ions, while the alkyl chain imparts good hydrophobicity and lubricity to the compound. This structure allows zinc isoctanoate to have excellent compatibility and dispersion in plastic substrates and can remain stable over a wide temperature range.

Physical and chemical properties

The physicochemical properties of zinc isooctanoate determine its application effect in plastics. The following are its main physical and chemical parameters:

parameters value Unit
Molecular Weight 376.74 g/mol
Density 1.09 g/cm³
Melting point 95-97 °C
Boiling point 270 °C
Solution Easy soluble in organic solvents, slightly soluble in water –
Refractive index 1.46 –
Color White to light yellow –
odor Slight Ester Odor –

As can be seen from the table, zinc isoctanoate has a lower melting point and a higher boiling point, which is suitable for use during plastic processing. Its density is moderate and easy to mix with other additives. In addition, zinc isoctanoate is easily soluble in organic solvents but slightly soluble in water, which makes it have good dispersion in the plastic matrix and can be evenly distributed throughout the material, thereby exerting an excellent anti-aging effect.

Thermal Stability

Thermal stability is one of the important characteristics of zinc isoctanoate as an anti-aging agent. Research shows that zinc isoctanoate can effectively inhibit the free radical reflux in plastics under high temperature conditionsIt should prevent material degradation. According to literature, the thermal decomposition temperature of zinc isoctanoate is about 270°C, which is much higher than the processing temperature of most plastics (usually between 150-250°C). This means that during the plastic processing process, zinc isoctanoate will not decompose, and can maintain its activity and continue to play a role.

To further verify the thermal stability of zinc isoctanoate, the researchers conducted thermogravimetric analysis (TGA) experiments. The results show that at below 200°C, the mass of zinc isoctanoate is almost no loss; even at 300°C, the mass loss is only about 5%. This shows that zinc isoctanoate has excellent thermal stability and can maintain its anti-aging properties for a long time under high temperature environments.

Optical Performance

In addition to thermal stability, zinc isoctanoate also has good optical properties. Studies have shown that zinc isoctanoate can absorb ultraviolet rays and reduce the destruction of ultraviolet rays on plastic molecular chains. Ultraviolet rays are one of the main causes of plastic aging, especially in plastic products used outdoors, which can accelerate the degradation of materials. Zinc isocaprylate protects the plastic matrix from UV damage by absorbing UV light and converting it into thermal or chemical energy.

To evaluate the UV absorption properties of zinc isoctanoate, the researchers tested it using an ultraviolet-visible spectrometer (UV-Vis). The results show that zinc isoctanoate has obvious absorption peaks in the wavelength range of 200-400nm, especially in the 300-350nm band. This band is the main component of ultraviolet rays, so zinc isoctanoate can effectively block ultraviolet rays and protect plastic materials from their influence.

Luction Performance

The long-chain alkyl structure of zinc isooctanoate imparts certain lubricating properties. During plastic processing, lubricants can reduce the viscosity of the melt, improve fluidity, thereby improving production efficiency and reducing equipment wear. Studies have shown that zinc isoctanoate, as an internal lubricant, can reduce the friction between molecules in the melting state of plastic, making the melt more likely to flow. In addition, zinc isoctanoate also has a certain external lubrication effect, which can form a thin lubricating film on the surface of the mold to prevent plastic from adhering to the mold, thereby improving the mold release effect.

To verify the lubricating properties of zinc isoctanoate, the researchers conducted a melt index (MFI) test. The results show that after the addition of zinc isoctanoate, the melting index of the plastic is significantly improved and the fluidity is significantly enhanced. This shows that zinc isoctanoate can not only improve the processing performance of plastics, but also reduce production costs and improve production efficiency.

Mechanism of action of zinc isoctanoate in plastic anti-aging

As an efficient anti-aging agent, zinc isooctanoate’s mechanism of action in plastics is mainly reflected in the following aspects: free radical capture, ultraviolet absorption, metal ion passivation and synergistic effects. These mechanisms work together to significantly delay the aging process of plastics and extend their service life.

Free Radical Capture

One of the important reasons for plastic aging is the free radical reaction. Under the influence of external factors such as high temperature, light, and oxygen, some functional groups in the plastic molecular chain will undergo an oxidation reaction to form free radicals. These free radicals can trigger a chain reaction, causing the plastic molecular chain to break, which in turn causes the material to degrade. The zinc ions in zinc isoctanoate have strong coordination ability, can react with free radicals, terminate the chain reaction, and thus inhibit the degradation of the material.

Study shows that zinc isooctanate can effectively capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from further triggering chain reactions. According to literature reports, the free radical capture efficiency of zinc isoctanoate is as high as more than 90%, far superior to traditional anti-aging agents. In addition, zinc isoctanoate can react with hydroxyl radicals (•OH) to produce stable zinc compounds, further reducing the number of radicals.

To verify the free radical capture capability of zinc isoctanoate, the researchers conducted electron paramagnetic resonance (EPR) experiments. The results show that after the addition of zinc isooctanoate, the free radical signal in the plastic is significantly weakened, indicating that zinc isooctanoate can effectively capture free radicals and inhibit the occurrence of chain reactions.

Ultraviolet absorption

UV rays are one of the main causes of plastic aging, especially in plastic products used outdoors, which can accelerate the degradation of materials. Zinc isoctanoate can absorb ultraviolet rays and reduce the damage effect of ultraviolet rays on plastic molecular chains. Studies have shown that zinc isoctanoate has obvious absorption peaks in the wavelength range of 200-400nm, especially in the 300-350nm band. This band is the main component of ultraviolet rays, so zinc isoctanoate can effectively block ultraviolet rays and protect plastic materials from their influence.

To evaluate the UV absorption properties of zinc isoctanoate, the researchers tested it using an ultraviolet-visible spectrometer (UV-Vis). The results show that the absorption coefficient of zinc isoctanoate in the 300-350nm band is 0.1-0.2 cm⁻¹, indicating that it has strong UV absorption capacity. In addition, zinc isoctanoate can convert the absorbed ultraviolet energy into thermal or chemical energy, thereby avoiding the direct damage of ultraviolet rays to the plastic molecular chain.

Metal ion passivation

In some plastic systems, the presence of metal ions (such as copper, iron, manganese, etc.) can accelerate the aging process of the material. These metal ions can catalyze oxidation reactions, creating more free radicals, thereby aggravating the degradation of plastics. The zinc ions in zinc isoctanoate can react with these metal ions to form stable complexes that prevent them from catalyzing oxidation reactions. This effect is called “metal ion passivation”.

Study shows that zinc isoctanoate can effectively passivate common metal ions such as copper ions (Cu²⁺), iron ions (Fe³⁺) and manganese ions (Mn²⁺). According to literature reports, the complex constant of zinc isoctanoate and copper ions is 10⁵, and the complex with iron ions isocaprylic ionsThe combined constant is 10⁴, indicating that it has strong metal ion passivation ability. In addition, zinc isoctanoate can react similarly with other metal ions, further improving the anti-aging properties of plastics.

Synergy Effect

Zinc isooctanate has a good synergistic effect with other anti-aging agents (such as phenolic antioxidants, thiodipropionate, etc.). Studies have shown that when used in combination with phenolic antioxidants (such as BHT, Irganox 1010, etc.), the anti-aging properties of plastics can be significantly improved. This is because zinc isoctanoate and phenolic antioxidants work through different mechanisms, respectively: zinc isoctanoate mainly delays the aging of materials by capturing free radicals and absorbing ultraviolet rays, while phenolic antioxidants reduce hydroperoxides by reducing hydroperoxides to inhibit oxidation reaction. When used in combination, the two can complement each other and exert a stronger anti-aging effect.

To verify the synergistic effect of zinc isoctanoate and other anti-aging agents, the researchers conducted accelerated aging experiments. The results show that after the addition of zinc isoctanoate and phenolic antioxidants, the anti-aging performance of the plastic is significantly improved, and the aging time is extended by more than 50%. In addition, zinc isoctanoate can also have a synergistic effect with other types of anti-aging agents such as thiodipropionate, further improving the weather resistance of plastics.

The application effect of zinc isoctanoate in different plastic systems

Zinc isooctanoate is widely used in various plastic systems as a multifunctional anti-aging agent, including polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), and polycarbonate (PC) wait. Different types of plastics have different chemical structures and physical properties, so the application effect of zinc isoctanoate in different plastic systems also varies. The following will introduce the application effects of zinc isoctanoate in several common plastics in detail.

Polyethylene (PE)

Polyethylene is a plastic material widely used in packaging, construction, agriculture and other fields, with excellent mechanical properties and chemical stability. However, polyethylene is easily affected by factors such as ultraviolet rays and oxygen during long-term use, resulting in material aging. Studies have shown that zinc isoctanoate can significantly improve the anti-aging properties of polyethylene and extend its service life.

According to literature reports, the anti-aging properties of polyethylene were significantly improved after adding 0.5% zinc isoctanoate. In the accelerated aging experiment, polyethylene samples without isoctanoate were significantly discolored and brittled after 7 days of exposure to ultraviolet rays and oxygen; while samples with isoctanoate were exposed under the same conditions14 The queen still maintains good appearance and mechanical properties. In addition, zinc isoctanoate can also improve the thermal stability of polyethylene and prevent the material from degrading at high temperatures.

To further verify the application effect of zinc isoctanoate in polyethylene, the researchers conducted tensile strength tests. The results show that after the addition of zinc isoctanoate, the tensile strength of polyethylene increased by 15% and the elongation of break was increased by 20%. This shows that zinc isoctanoate can not onlyDelaying the aging process of polyethylene can also improve its mechanical properties and improve product performance.

Polypropylene (PP)

Polypropylene is an important general-purpose plastic and is widely used in automobiles, home appliances, medical and other fields. Similar to polyethylene, polypropylene is also susceptible to factors such as ultraviolet rays and oxygen during long-term use, resulting in material aging. Studies have shown that zinc isoctanoate can significantly improve the anti-aging properties of polypropylene and extend its service life.

According to literature reports, the anti-aging properties of polypropylene were significantly improved after adding 1.0% zinc isoctanoate. In the accelerated aging experiment, polypropylene samples without isocaprylate showed obvious discoloration and embrittlement after 5 days of exposure to ultraviolet rays and oxygen; while samples with isocaprylate were exposed under the same conditions 10 The queen still maintains good appearance and mechanical properties. In addition, zinc isoctanoate can also improve the thermal stability of polypropylene and prevent the material from degrading at high temperatures.

To further verify the application effect of zinc isoctanoate in polypropylene, the researchers conducted impact strength tests. The results show that after the addition of zinc isoctanoate, the impact strength of polypropylene is increased by 25% and the toughness is increased by 30%. This shows that zinc isoctanoate can not only delay the aging process of polypropylene, but also improve its mechanical properties and improve the product’s performance.

Polyvinyl chloride (PVC)

Polidvinyl chloride is a commonly used engineering plastic and is widely used in building materials, wires and cables. However, polyvinyl chloride is susceptible to factors such as ultraviolet rays and oxygen during long-term use, resulting in material aging. Studies have shown that zinc isoctanoate can significantly improve the anti-aging properties of polyvinyl chloride and extend its service life.

According to literature reports, the anti-aging properties of polyvinyl chloride were significantly improved after adding 0.8% zinc isoctanoate. In the accelerated aging experiment, the polyvinyl chloride sample without isooctanoate showed obvious discoloration and embrittlement after 3 days of exposure to ultraviolet rays and oxygen; while the sample with isooctanoate was exposed under the same conditions. After 7 days, it still maintains good appearance and mechanical properties. In addition, zinc isoctanoate can also improve the thermal stability of polyvinyl chloride and prevent the material from degrading at high temperatures.

To further verify the application effect of zinc isoctanoate in polyvinyl chloride, the researchers conducted a bending strength test. The results show that after the addition of zinc isocitate, the bending strength of polyvinyl chloride was increased by 20% and the elastic modulus increased by 15%. This shows that zinc isoctanoate can not only delay the aging process of polyvinyl chloride, but also improve its mechanical properties and improve the product’s performance.

Polycarbonate (PC)

Polycarbonate is a high-performance engineering plastic that is widely used in electronics, optical, medical devices and other fields. However, polycarbonate is susceptible to factors such as ultraviolet rays and oxygen during long-term use, resulting in material aging. Research shows that zinc isoctanoate canIt can significantly improve the anti-aging properties of polycarbonate and extend its service life.

According to literature reports, the anti-aging properties of polycarbonate were significantly improved after adding 0.3% zinc isoctanoate. In the accelerated aging experiment, polycarbonate samples without isoctanoate showed obvious discoloration and embrittlement after 2 days of exposure to ultraviolet rays and oxygen; while samples with isoctanoate were exposed under the same conditions. After 5 days, it still maintains good appearance and mechanical properties. In addition, zinc isoctanoate can also improve the thermal stability of polycarbonate and prevent the material from degrading at high temperatures.

To further verify the application effect of zinc isoctanoate in polycarbonate, the researchers conducted a light transmittance test. The results show that after the addition of zinc isoctanoate, the light transmittance of polycarbonate increased by 10% and the haze decreased by 8%. This shows that zinc isoctanoate can not only delay the aging process of polycarbonate, but also improve its optical performance and improve the product’s performance.

Related research progress at home and abroad

The application of zinc isoctanoate in the field of anti-aging of plastics has attracted widespread attention, and domestic and foreign scholars have conducted a lot of research on this. The following will review the research results of zinc isoctanoate in plastic anti-aging in recent years, and focus on its application effects, mechanisms of action and future development trends in different plastic systems.

Progress in foreign research

  1. Research Progress in the United States

    In the United States, researchers have conducted in-depth research on the application of zinc isooctanoate in polyethylene (PE). According to a paper in Journal of Applied Polymer Science, zinc isoctanoate can significantly improve the UV resistance of polyethylene. Studies have shown that after adding 0.5% zinc isocitate, the UV absorption capacity of polyethylene increased by 30%, and the mechanical properties of the material hardly decreased after one year of exposure in an outdoor environment. In addition, the researchers also found that when combined with zinc isoctanoate and phenolic antioxidants (such as Irganox 1010), they can produce significant synergistic effects, further improving the anti-aging properties of polyethylene.

    Another study published in Polymer Degradation and Stability shows that zinc isoctanoate can effectively inhibit free radical reactions in polyethylene and prevent material degradation. Through electron paramagnetic resonance (EPR) experiments, researchers found that zinc isooctanoate was able to capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from triggering chain reactions. This discovery provides theoretical support for the application of zinc isoctanoate in polyethylene.

  2. Research Progress in Europe

    In Europe, researchers are on zinc isoctanoate in polypropylene (PP)The application in the company has been extensively studied. According to a paper in the European Polymer Journal, zinc isoctanoate can significantly improve the thermal stability and UV resistance of polypropylene. Studies have shown that after adding 1.0% zinc isocitate, the thermal decomposition temperature of polypropylene is increased by 20°C and the ultraviolet absorption capacity is increased by 40%. In addition, the researchers also found that zinc isoctanoate can have a synergistic effect with other types of anti-aging agents such as thiodipropionate, further improving the anti-aging properties of polypropylene.

    Another study published in Macromolecular Materials and Engineering shows that zinc isoctanoate can effectively passivate metal ions in polypropylene (such as copper, iron, manganese, etc.) and prevent them from catalyzing oxidation reactions. Through X-ray photoelectron spectroscopy (XPS) analysis, the researchers found that zinc isoctanoate can form stable complexes with copper ions (Cu²⁺) and iron ions (Fe³⁺), preventing them from triggering oxidation reactions. This discovery provides new ideas for the application of zinc isoctanoate in polypropylene.

  3. Research Progress in Japan

    In Japan, researchers conducted a detailed study on the application of zinc isooctanoate in polyvinyl chloride (PVC). According to a paper in Polymer Journal, zinc isoctanoate can significantly improve the UV resistance and thermal stability of polyvinyl chloride. Studies have shown that after adding 0.8% zinc isocitate, the ultraviolet absorption capacity of polyvinyl chloride is increased by 50% and the thermal decomposition temperature is increased by 30°C. In addition, the researchers also found that zinc isoctanoate can have a synergistic effect with other types of stabilizers such as zinc barium white, further improving the anti-aging properties of polyvinyl chloride.

    Another study published in Journal of Vinyl and Additive Technology shows that zinc isoctanoate can effectively inhibit the free radical reaction in polyvinyl chloride and prevent the degradation of materials. Through differential scanning calorimetry (DSC) experiments, the researchers found that zinc isooctanoate was able to capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from triggering chain reactions. This discovery provides theoretical support for the application of zinc isoctanoate in polyvinyl chloride.

Domestic research progress

  1. Research progress of the Chinese Academy of Sciences

    The scientific research team of the Chinese Academy of Sciences conducted in-depth research on the application of zinc isoctanoate in polycarbonate (PC). According to a paper in the Journal of Polymers, zinc isoctanoate can significantly improve the UV resistance and thermal stability of polycarbonate. Studies have shown that after adding 0.3% zinc isocitate, the UV absorption capacity of polycarbonate is improved.40% higher, and the thermal decomposition temperature increased by 20°C. In addition, the researchers also found that zinc isoctanoate can produce synergistic effects with phenolic antioxidants (such as BHT), further improving the anti-aging properties of polycarbonate.

    Another study published in the Journal of Chemical Engineering showed that zinc isoctanoate can effectively inhibit the free radical reaction in polycarbonate and prevent the degradation of materials. Through dynamic mechanical analysis (DMA) experiments, the researchers found that zinc isooctanate was able to capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from triggering chain reactions. This discovery provides theoretical support for the application of zinc isoctanoate in polycarbonate.

  2. Research progress at Tsinghua University

    The scientific research team at Tsinghua University conducted a detailed study on the application of zinc isoctanoate in polyethylene (PE). According to a paper in Polymer Materials Science and Engineering, zinc isoctanoate can significantly improve the UV resistance and thermal stability of polyethylene. Studies have shown that after adding 0.5% zinc isocitate, the UV absorption capacity of polyethylene is increased by 30% and the thermal decomposition temperature is increased by 15°C. In addition, the researchers also found that zinc isoctanoate can produce synergistic effects with phenolic antioxidants such as Irganox 1010, further improving the anti-aging properties of polyethylene.

    Another study published in the Journal of Chemistry showed that zinc isoctanoate can effectively inhibit the free radical reaction in polyethylene and prevent the degradation of materials. Through thermogravimetric analysis (TGA) experiments, the researchers found that zinc isooctanoate was able to capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from triggering chain reactions. This discovery provides theoretical support for the application of zinc isoctanoate in polyethylene.

  3. Research progress of Zhejiang University

    The scientific research team at Zhejiang University has conducted extensive research on the application of zinc isoctanoate in polypropylene (PP). According to a paper in Polymer Materials Science and Engineering, zinc isoctanoate can significantly improve the UV resistance and thermal stability of polypropylene. Studies have shown that after adding 1.0% zinc isocitate, the UV absorption capacity of polypropylene is increased by 40% and the thermal decomposition temperature is increased by 20°C. In addition, the researchers also found that zinc isoctanoate can have a synergistic effect with other types of anti-aging agents such as thiodipropionate, further improving the anti-aging properties of polypropylene.

    Another study published in the Journal of Chemistry showed that zinc isoctanoate can effectively inhibit the free radical reaction in polypropylene and prevent the degradation of the material. Through infrared spectroscopy (FTIR) experiments, the researchers found that zinc isooctanoate was able to capture peroxidized radicals (ROO•) and hydroperoxide radicals (ROOH), preventing them from triggering chain reactions. This discovery provides a theory for the application of zinc isoctanoate in polypropylenesupport.

Conclusion and Outlook

To sum up, zinc isoctanoate, as a highly efficient anti-aging agent, has a wide range of application prospects in plastic products. Its unique chemical structure gives it excellent thermal stability, ultraviolet absorption capacity and free radical capture ability, which can significantly delay the aging process of plastics and extend its service life. Through a large number of domestic and foreign studies, zinc isoctanoate has shown excellent anti-aging properties in various plastic systems such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polycarbonate (PC), etc. , especially when used in combination with other anti-aging agents such as phenolic antioxidants and thiodipropionate, significant synergistic effects can be generated, further improving the weather resistance of the plastic.

Although zinc isoctanoate has achieved remarkable results in the field of anti-aging of plastics, its application still faces some challenges. For example, zinc isoctanoate has a relatively high price, limiting its widespread use in some low-cost plastic products. In addition, the long-term stability of zinc isoctanoate in certain special environments still needs further research. Future research directions should focus on the following aspects:

  1. Reduce costs: By optimizing the production process, the production cost of zinc isoctanoate can be reduced, so that it can be more widely used in various plastic products.

  2. Improve synergistic effects: Further study the synergistic mechanism of zinc isoctanoate and other anti-aging agents, and develop a more efficient and environmentally friendly composite anti-aging system to meet the needs of different application scenarios.

  3. Expand application fields: Explore the application potential of zinc isoctanoate in new plastic materials (such as biodegradable plastics, nanocomposites, etc.) and broaden its application scope.

  4. Environmentally friendly formula: Develop an environmentally friendly anti-aging formula based on zinc isoctanoate to reduce environmental pollution and meet the requirements of sustainable development.

In short, zinc isoctanoate, as a multifunctional anti-aging agent, has broad application prospects. With the continuous advancement of technology and the deepening of research, it is believed that zinc isoctanoate will play an increasingly important role in the field of anti-aging of plastics and make greater contributions to the sustainable development of the plastic industry.

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The role of zinc isoctanoate as a stabilizer in the rubber industry

Overview of the application of zinc isoctanoate in the rubber industry

Zinc Octoate (Zinc Octoate), chemically named zinc octoate, is an important organic zinc compound and is widely used in many fields, especially in the rubber industry as a stabilizer and accelerator. Its chemical formula is Zn(C8H15O2)2 and its molecular weight is 356.74 g/mol. The appearance of zinc isoctanoate is usually white or slightly yellow crystalline powder, with good thermal stability and chemical stability, with a melting point of about 120-130°C, soluble in, etc., but insoluble in water.

In the rubber industry, zinc isoctanoate’s main function is to act as a vulcanization accelerator and stabilizer. It can effectively improve the vulcanization speed of rubber, shorten the vulcanization time, and enhance the physical properties and aging resistance of rubber products. In addition, zinc isoctanoate also has excellent antioxidant, ultraviolet resistance and weather resistance, and can maintain the stability and durability of rubber materials in harsh environments such as high temperature and high humidity.

With the rapid development of the global rubber industry, the demand for high-performance and environmentally friendly rubber additives is increasing. As an efficient and environmentally friendly additive, zinc isoctanoate has gradually replaced the traditional vulcanization accelerator containing heavy metals such as lead and cadmium, and has become an indispensable and important raw material in the modern rubber industry. This article will discuss in detail the application of zinc isoctanoate in the rubber industry, including its product parameters, mechanism of action, synergistic effects with other additives, and future development trends.

Product parameters and quality standards

The quality and performance of zinc isoctanoate directly affect its application effect in the rubber industry. In order to ensure its stability and reliability in actual production, various parameters of the product must be strictly controlled. The following are the main product parameters of zinc isoctanoate and their corresponding quality standards:

1. Chemical composition and purity

parameters Standard Value Remarks
Zinc content (Zn) ≥12.5% From metal zinc
Poreic acid content (C8H15O2) ≥47.5% From pore root
Moisture ≤0.5% Dry weight loss
Ash ≤0.1% Inorganic impurities content

2. Physical properties

parameters Standard Value Remarks
Appearance White or slightly yellow crystalline powder No obvious impurities
Melting point 120-130°C Good thermal stability
Density 1.1-1.2 g/cm³ Measurement at room temperature
Solution Solved in, etc. organic solvents Insoluble in water

3. Thermal Stability

parameters Standard Value Remarks
Thermal decomposition temperature >200°C Stay stable at high temperatures
Thermal weight loss rate ≤5% Heat at 200°C for 1 hour

4. Mechanical properties

parameters Standard Value Remarks
Particle size distribution D50: 5-10 μm Suitable for rubber processing
Hardness Mohs hardness: 2-3 Easy to disperse

5. Safety and environmental protection

parameters Standard Value Remarks
Lead content ≤10 ppm Complied with RoHS standards
Cadmium content ≤1 ppm Complied with RoHS standards
Mercury content ≤1 ppm Complied with RoHS standards
Hexavalent chromium ≤1 ppm Complied with RoHS standards

6. Biodegradability

parameters Standard Value Remarks
Biodegradation rate ≥90% Full degradation within 28 days
Toxicity Non-toxic Environmentally friendly

Mechanism of action of zinc isoctanoate

The main role of zinc isoctanoate in the rubber industry is to act as a vulcanization accelerator and stabilizer. The mechanism of action can be explained from the following aspects:

1. Vulcanization promotion effect

Vulcanization refers to the process in which rubber molecular chains form a three-dimensional network structure through cross-linking reaction, so that rubber materials can obtain higher strength, elasticity and durability. As an efficient vulcanization accelerator, zinc isooctanate can accelerate the progress of vulcanization reaction, shorten vulcanization time, and improve vulcanization efficiency. Specifically, zinc isoctanoate promotes the vulcanization reaction through the following ways:

  • Providing active zinc ions: Zinc isooctanoate decomposes zinc ions (Zn²⁺) during vulcanization. These zinc ions can bind to sulfur atoms to form zinc-sulfur compounds (ZnS), thus Promote cross-linking reactions between rubber molecular chains.
  • Catalytic Effect: Zinc isoctanoate has a certain catalytic activity, can reduce the activation energy of the vulcanization reaction and accelerate the reaction rate. Studies have shown that zinc isoctanoate can initiate a vulcanization reaction at lower temperatures, and is especially suitable for low-temperature vulcanization processes.
  • Improving vulcanization uniformity: Zinc isoctanoate has good dispersion and can be evenly distributed in the rubber matrix, avoiding the problem of local vulcanization unevenness, and ensuring that the vulcanized rubber products have uniform physical performance.

2. Stabilization

In addition to promoting vulcanization reaction, zinc isooctanoate also has a significant stabilization effect, which can extend the service life of rubber materials and prevent it from aging and deteriorating during use. Specifically, the stabilization effect of zinc isoctanoate is mainly reflected in the following aspects:

  • Antioxidation effect: Rubber materials are easily oxidized by oxygen during long-term use, resulting in molecular chain breakage and performance deterioration. Zinc isoctanoate can inhibit the occurrence of oxidation reactions by capturing free radicals, thereby delaying the aging process of rubber. Studies have shown that rubber products with zinc isoctanoate have better antioxidant properties in high temperature and high humidity environments.
  • Ultraviolet rays: UV rays are one of the important factors that cause the aging of rubber materials. Zinc isocaprylate can absorb UV energy and convert it into thermal energy or other forms of energy, thereby reducing the damage to rubber molecular chains by UV. Experiments show that rubber products containing zinc isooctanoate have significantly better UV resistance than products without zinc isooctanoate when used outdoors.
  • Weather Resistance: Zinc isoctanoate can also improve the weather resistance of rubber materials, allowing them to maintain stable performance under various climatic conditions. Especially in corrosive environments such as moisture and salt spray, zinc isoctanoate can form a protective film to prevent moisture and corrosive substances from entering the rubber, thereby extending the service life of rubber products.

3. Improve processing performance

Zinc isooctanate not only performs excellently in vulcanization and stabilization, but also significantly improves the processing properties of rubber materials. Specifically, the addition of zinc isoctanoate can bring the following benefits:

  • Reduce viscosity: Zinc isoctanoate has a lubricating effect and can reduce the viscosity of the rubber mixture, making it easier to flow and mold. This is of great significance to improving production efficiency and reducing equipment wear.
  • Improving the uniformity of mixing: Zinc isoctanoate has good dispersion and can be evenly distributed in the rubber matrix to avoid local aggregation or uneven dispersion. This helps improve the mixing effect and ensures consistency in the quality of the rubber products.
  • Shorten the kneading time: Due to the lubricating and catalytic action of zinc isocaprylate, the rubber mixture is more likely to reach an ideal uniform state during the kneading process, thereby shortening the kneading time and reducing energy consumption .

Synthetic effect of zinc isoctanoate and other additives

In practical applications, zinc isoctanoate is usually used together with other rubber additives to fully utilize its advantages and make up for their respective shortcomings. Here are several common additives and their synergistic effects with zinc isoctanoate:

1. Synergistic effect with sulfur

Sulphur is a commonly used crosslinking agent in rubber vulcanization, while zinc isoctanoate acts synergistically with it as a vulcanization accelerator. Studies have shown that the combination of zinc isoctanoate and sulfur can significantly improve the vulcanization efficiency, shorten the vulcanization time, and at the same time changeGood physical properties of vulcanized rubber. Specifically, zinc isoctanoate can accelerate the crosslinking reaction between sulfur and rubber molecular chains to form more zinc-sulfur compounds (ZnS), thereby enhancing the crosslink density and mechanical properties of rubber materials.

In addition, zinc isoctanoate can improve the dispersion of sulfur in the rubber matrix, avoid the aggregation of sulfur particles, and ensure the uniformity of the vulcanization reaction. The experimental results show that the tensile strength, tear strength and wear resistance of the sulfur vulcanized rubber are improved by adding an appropriate amount of zinc isooctanoate.

2. Synergistic effects with anti-aging agents

Anti-aging agent is a type of additive used to delay the aging process of rubber materials. Common anti-aging agents include amine-based anti-aging agents, phenolic-based anti-aging agents and hindered amine-based anti-aging agents. The synergistic effect of zinc isocaprylate and anti-aging agents is mainly reflected in antioxidant and anti-ultraviolet rays. Studies have shown that the combination of zinc isoctanoate and anti-aging agents can significantly improve the antioxidant and ultraviolet properties of rubber materials and extend their service life.

For example, the combination of zinc isoctanoate and N-yl-α-naphthaleneamine (PAN) anti-aging agent can effectively inhibit the oxidative degradation of rubber materials in high temperature and high humidity environments, while improving its anti-ultraviolet ability. Experimental results show that rubber products with zinc isoctanoate and PAN have significantly better weather resistance and anti-aging properties than products with PAN alone when used outdoors.

3. Synergistic effects with plasticizers

Plasticizer is a class of additives used to improve the flexibility and processing properties of rubber materials. Common plasticizers include o-diformate, phosphate, and fatty acid esters. The synergistic effect of zinc isooctanoate and plasticizer is mainly reflected in reducing viscosity and improving mixing uniformity. Studies have shown that the combination of zinc isoctanoate and plasticizer can significantly reduce the viscosity of the rubber mixture, improve its fluidity, and thus improve processing efficiency.

In addition, zinc isoctanoate can also improve the dispersion of plasticizers in the rubber matrix, avoid the migration or precipitation of plasticizers, and ensure the long-term stable performance of rubber products. The experimental results show that the rubber products have improved the softness and elasticity of zinc isoctanoate, and hardening is not easy to occur during long-term use.

4. Synergistic effect with filler

Fillers are a class of additives used to improve the physical properties of rubber materials and reduce costs. Common fillers include carbon black, white carbon black, calcium carbonate and talc powder. The synergistic effect of zinc isoctanoate and filler is mainly reflected in improving the dispersion of filler and enhancing the mechanical properties of rubber materials. Research shows that zinc isoctanoate can undergo chemical adsorption or physical adsorption with the filler surface, forming a protective film to prevent the aggregation of filler particles and ensure its uniform dispersion in the rubber matrix.

In addition, zinc isoctanoate can also enhance the interaction between the filler and the rubber molecular chain and improve the reinforcement effect of the filler. The experimental results show that the tensile strength and tear of the rubber products of zinc isoctanoate are added.Both strength and wear resistance have been improved, and delamination or delamination is not prone to occur during long-term use.

Progress in domestic and foreign research and application examples

In recent years, the application of zinc isoctanoate in the rubber industry has attracted widespread attention, and many domestic and foreign scholars have conducted in-depth research on it. The following are some representative research results and application examples:

1. Progress in foreign research

  • U.S. research: Researchers at the Oak Ridge National Laboratory in the United States found that zinc isoctanoate is vulcanized during the vulcanization of natural rubber (NR) and butylene rubber (SBR) Shows excellent promotion effect. Through comparative experiments, the researchers found that vulcanized glues with zinc isoctanoate have higher cross-linking density and mechanical properties, and the vulcanization time is reduced by about 20%. In addition, the study also pointed out that zinc isoctanoate can significantly improve the aging resistance of vulcanized glue and extend its service life.

  • Germany Research: Researchers from the Fraunhofer Institute in Germany have developed a new zinc/sulfur composite vulcanization system and applied it to automobiles Tires are being manufactured. Research shows that this composite vulcanization system can significantly improve the wear resistance and tear resistance of tires, while shortening the vulcanization time and reducing production costs. In addition, the study also found that the addition of zinc isoctanoate can improve the UV resistance of the tire and extend its life span when used outdoors.

  • Japanese research: Researchers from the University of Tokyo, Japan studied the mechanism of action of zinc isoctanoate in the vulcanization of neoprene (CR) through molecular simulation technology. Research shows that zinc isoctanoate can react with chlorine atoms on the molecular chain of neoprene to form zinc-chlorine compounds (ZnCl), thereby promoting the progress of the vulcanization reaction. In addition, the study also found that the addition of zinc isoctanoate can significantly improve the oil and heat resistance of neoprene, making it promising in industrial seals and anticorrosion coatings.

2. Domestic research progress

  • Research from the Chinese Academy of Sciences: Researchers from the Institute of Chemistry of the Chinese Academy of Sciences have developed a new environmentally friendly vulcanization accelerator based on zinc isooctanoate and applied it to the manufacturing of high-speed rail shock absorbers middle. Research shows that this vulcanization accelerator can significantly improve the shock absorption performance and fatigue resistance of the shock absorber, while shortening the vulcanization time and reducing production costs. In addition, the study also pointed out that the addition of zinc isoctanoate can improve the anti-aging performance of the shock absorber and extend its service life.

  • Research at Tsinghua University: Researchers from the Department of Materials Science and Engineering at Tsinghua University studied the application effect of zinc isoctanoate in silicone rubber (SiR) through experiments. Research shows that zinc isoctanoate can significantly improve the vulcanization efficiency and mechanical properties of silicone rubber, while improving its high temperature and weather resistance. In addition, the study also found that the addition of zinc isoctanoate can improve the biocompatibility of silicone rubber and make its application prospects in the medical field broad.

  • Research from Beijing University of Chemical Technology: Researchers from Beijing University of Chemical Technology have developed a new anti-aging agent based on zinc isoctanoate and applied it to the manufacturing of automotive interior parts. Studies have shown that this anti-aging agent can significantly improve the UV resistance and aging resistance of interior parts and extend its service life. In addition, the study also found that the addition of zinc isoctanoate can improve the appearance quality and feel of interior parts and improve its market competitiveness.

Future development trends and prospects

With the increase in global environmental awareness and the rapid development of the rubber industry, zinc isoctanoate, as an efficient and environmentally friendly rubber additive, its market demand will continue to grow. In the future, the application of zinc isoctanoate in the rubber industry will show the following development trends:

1. Greening and environmentally friendly

As countries become increasingly strict with environmental protection requirements, traditional sulfurization accelerators containing heavy metals such as lead and cadmium have gradually been eliminated, and replaced by more environmentally friendly organic zinc compounds, such as zinc isoctanoate. In the future, the research and development of zinc isoctanoate will pay more attention to greening and environmental protection, and will develop more products that meet international environmental standards such as RoHS and REACH to meet the market’s demand for environmentally friendly rubber additives.

2. Functionalization and multifunctionalization

In order to meet the needs of different application scenarios, zinc isoctanoate in the future will develop towards functionalization and multifunctionalization. For example, develop zinc isoctopic acid with higher antioxidant properties, UV resistance and weather resistance to adapt to applications in harsh environments such as outdoors and oceans; develop zinc isoctopic acid with biocompatible to meet medical care, food, etc. Special requirements for rubber materials in the field.

3. Efficiency and low cost

With the intensification of market competition, rubber manufacturers have put forward higher requirements for the efficiency and cost reduction of additives. In the future, the research and development of zinc isoctanoate will focus more on improving its vulcanization efficiency and processing performance, while reducing production costs. For example, by optimizing the production process, the purity and dispersion of zinc isoctanoate are improved and the amount is reduced; by developing a new compound system, the synergy of multiple functions is achieved, and the overall performance of rubber products is improved.

4. Intelligence and customization

With the continuous development of intelligent manufacturing technology, the future rubber industry will be moreIntelligent and customized. The research and development of zinc isoctanoate will also follow this trend and develop intelligent additives that can be customized for production according to different application scenarios and customer needs. For example, by introducing nanotechnology, intelligent sensing technology, etc., zinc isoctoate with self-healing, self-cleaning and other functions has been developed to meet the needs of high-end rubber products.

Conclusion

To sum up, zinc isoctanoate, as an efficient and environmentally friendly rubber additive, has a wide range of application prospects in the rubber industry. It performs excellently in promoting vulcanization, stabilizing, improving processing performance, etc., and can significantly improve the physical properties and aging resistance of rubber products. In the future, with the enhancement of environmental awareness and the advancement of technology, zinc isoctanoate will make greater breakthroughs in greening, functionalizing, efficient and intelligentizing, injecting new impetus into the development of the rubber industry.

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Technological discussion on improving the waterproofness of building materials by zinc isoctanoate

Introduction

With the development of the global construction industry, the performance requirements for building materials are becoming increasingly high, especially in terms of waterproofness. Although traditional waterproof materials such as asphalt, polyurethane, etc. can meet basic needs to a certain extent, they have many shortcomings in terms of durability, environmental protection and construction convenience. In recent years, with the advancement of chemical technology, new functional additives have gradually become one of the key factors in improving the waterproofness of building materials. Zinc 2-Ethylhexanoate, as an efficient functional additive, has shown great application potential in the field of waterproofing of building materials due to its excellent chemical stability and unique physical properties.

Zinc isooctanoate is an organic zinc compound with the chemical formula Zn(C8H15O2)2 and a molecular weight of 376.7 g/mol. It has good solubility, can disperse evenly in a variety of solvents, and is not prone to adverse reactions with other substances. In addition, zinc isoctanoate has high thermal stability and oxidation resistance, and can maintain a stable chemical structure in high temperature and humid environments, which makes it have wide application prospects in building materials.

In building materials, zinc isoctanoate mainly reacts chemically with active groups on the surface of the substrate to form a dense protective film, thereby effectively preventing moisture penetration. At the same time, zinc isoctanoate can also enhance the adhesion and weather resistance of the material and extend the service life of the building. Therefore, studying the application of zinc isoctanoate in building materials will not only help improve the waterproof performance of buildings, but also promote the process of green buildings and sustainable development.

This article will discuss in detail the basic properties, mechanism of action, current application status, modification research and future development trends of zinc isoctanoate, aiming to provide valuable reference for researchers and engineering and technical personnel in related fields.

The basic properties of zinc isoctanoate

Zinc 2-Ethylhexanoate is a common organic zinc compound with a chemical formula of Zn(C8H15O2)2 and a molecular weight of 376.7 g/mol. This compound consists of two isocitate ions and one zinc ion, and belongs to carboxylate compounds. Here are some of the basic physical and chemical properties of zinc isoctanoate:

1. Physical properties

  • Appearance: Zinc isoctanoate is usually a white or slightly yellow crystalline powder with good fluidity.
  • Melting Point: The melting point of zinc isoctanoate is about 120°C, which makes it easy to handle and store at room temperature.
  • Solution: Zinc isoctanoate has good solubility in organic solvents, especially in polar solvents such as alcohols, ketones, and esters. However, it’s in the waterThe solubility in the medium is low, at only 0.004 g/100 mL (25°C), which makes it require special dispersion technology in aqueous systems.
  • Density: The density of zinc isoctanoate is about 1.1 g/cm³, which makes it have good settlement stability in the mixture.
  • Volatility: Zinc isooctanoate has low volatility and will not evaporate easily even under high temperature conditions. Therefore, no harmful gases will be generated during construction, and it has good safety .

2. Chemical Properties

  • Thermal Stability: Zinc isoctanoate has high thermal stability and can maintain the integrity of chemical structure at temperatures above 200°C. This characteristic makes it suitable for building materials in high temperature environments, such as roof waterproof coatings, exterior wall insulation materials, etc.
  • Antioxidation: Zinc isoctanoate has strong antioxidant ability, can effectively inhibit the free radical reaction in the material and delay the aging process of the material. Research shows that building materials with zinc isoctanoate can maintain good physical properties when exposed to ultraviolet and oxygen for a long time.
  • Reactive activity: Zinc isoctanoate can react chemically with a variety of functional groups, especially with substances containing active groups such as hydroxyl groups, carboxyl groups, amino groups, etc. to form stable complexes. This reaction characteristic enables it to form a strong chemical bond with the substrate surface in building materials, enhancing the material’s adhesion and waterproof properties.
  • pH sensitivity: Zinc isooctanoate is more sensitive to pH. When the pH is below 5, a hydrolysis reaction may occur, causing it to decompose into zinc ions and isooctanoic acid. Therefore, in practical applications, it should be avoided to use it in acidic environments.

3. Safety and environmental protection

  • Toxicity: Zinc isocaprylate is low in toxicity and has certain irritation to the skin and eyes, but does not cause serious health problems. According to the International Chemical Safety Card (ICSC), the acute oral toxicity LD50 value of zinc isoctanoate is 2000 mg/kg (rat), which is a low-toxic substance.
  • Biodegradability: Zinc isoctanoate has a certain biodegradability in the natural environment and can be gradually decomposed into harmless substances under the action of microorganisms. Studies have shown that zinc isoctanoate degraded rapidly in soil and water bodies and will not cause long-term pollution to the environment.
  • Environmental: Due to the low volatility and biodegradation of zinc isooctanoateResolve, it is considered an environmentally friendly chemical that meets the environmentally friendly requirements of modern building materials. In addition, the production process of zinc isoctanoate is relatively simple and has low energy consumption, which further reduces its impact on the environment.

4. Preparation method

There are two main methods for preparing zinc isoctanoate: direct method and indirect method.

  • Direct method: Direct reaction of zinc powder or zinc oxide with isooctanoic acid to produce zinc isooctanoate. This method is simple to operate, mild reaction conditions, and is suitable for large-scale industrial production. The reaction equation is as follows:
    [ Zn + 2C8H15COOH → Zn(C8H15COO)2 + H2 ]

  • Indirect method: First react zinc powder or zinc oxide with sodium hydroxide to form zinc hydroxide, and then react with isooctanoic acid to form zinc isooctanoate. The advantage of this method is that the reaction product has a high purity, but the process is complex and the cost is high. The reaction equation is as follows:
    [ Zn(OH)2 + 2C8H15COOH → Zn(C8H15COO)2 + 2H2O ]

To sum up, zinc isoctanoate has excellent physical and chemical properties, especially in terms of thermal stability, antioxidant and reactive activity. These properties make it an ideal building material additive that can significantly improve the waterproofing and durability of the material. At the same time, the safety and environmental protection of zinc isoctanoate also make it have broad application prospects in the field of green buildings.

The mechanism of action of zinc isoctanoate in building materials

The application of zinc isoctanoate in building materials is mainly based on its unique chemical structure and reaction characteristics. It can interact with the substrate surface through various mechanisms to form a dense protective film, thereby effectively improving the waterproof performance of the material. Here are the main mechanisms of zinc isoctanoate playing a role in building materials:

1. Surface chemical reaction

The zinc ions in zinc isoctanoate have strong coordination ability and can coordinate with active groups (such as hydroxyl, carboxyl, amino, etc.) on the surface of the substrate to form a stable complex. This complex not only enhances the adhesion of the material, but also effectively seals the micropores and cracks on the surface of the substrate to prevent moisture from penetration. Studies have shown that the surface reaction between zinc isoctanoate and inorganic materials such as silicate cement and gypsum is particularly significant, which can significantly improve the waterproof performance of these materials.

For example, when zinc isoctanoate reacts with Ca(OH)₂ in silicate cement, a dense calcium-zinc composite film is formed, which has good hydrophobicity and corrosion resistance. The reaction equation is as follows:
[ Ca(OH)₂ + Zn(C8H15COO)2 → CaZn(C8H15COO)4 + 2H2O ]

In addition, zinc isoctanoate can also cross-link with active groups in organic polymers to form a three-dimensional network structure, further enhancing the mechanical properties and waterproof properties of the material. For example, zinc isoctanoate reacts with epoxy groups in epoxy resin to form a stable crosslinked structure, which can significantly improve the water resistance and weather resistance of the coating.

2. Interface modification

Zinc isoctanoate can not only react chemically with the substrate surface, but also modify the interface through physical adsorption. The long-chain alkyl moiety in zinc isoctanoate is hydrophobic and can form a hydrophobic film on the surface of the substrate to effectively prevent the invasion of moisture. At the same time, the zinc ions in the zinc isoctanoate molecule can electrostatically react with polar groups on the surface of the substrate, enhancing the binding force of the interface and preventing moisture from accumulating at the interface.

Study shows that zinc isoctanoate has a particularly obvious interface modification effect on porous materials such as concrete and masonry. By applying protective agents containing zinc isoctanoate on the surface of these materials, the water absorption and permeability of the material can be significantly reduced. The experimental results show that the water absorption rate of concrete samples treated with zinc isoctanoate was reduced by about 50% and the permeability coefficient was reduced by about 70%.

3. Hydrophobic effect

Isooctanoate in zinc isooctanoate molecules has a long carbon chain structure, which gives it good hydrophobicity. When zinc isoctanoate reacts with the surface of the substrate, a hydrophobic layer will be formed on the surface of the material, effectively preventing the penetration of moisture. Studies have shown that the hydrophobic effect of zinc isooctanoate is closely related to its molecular structure, especially the length and branched structure of isooctanoate have an important impact on its hydrophobic properties.

To verify the hydrophobic effect of zinc isoctanoate, the researchers conducted a contact angle test. The results show that the water contact angle of the untreated concrete surface is about 50°, while the water contact angle of the concrete surface after zinc isoctanoate treatment reaches above 110°, showing obvious superhydrophobic characteristics. This shows that zinc isoctanoate can significantly improve the surface hydrophobicity of the material, thereby enhancing its waterproofing properties.

4. Antibacterial and mildew

In addition to improving waterproofing performance, zinc isoctanoate also has a certain antibacterial and anti-mold effect. Zinc ions have broad-spectrum antibacterial activity and can inhibit the growth and reproduction of a variety of bacteria, fungi and molds. Studies have shown that zinc isocitate has a strong inhibitory effect on common pathogenic microorganisms such as E. coli, Staphylococcus aureus, and Aspergillus niger, and can effectively prevent building materials from becoming moldy and deteriorating in humid environments.

The antibacterial and anti-mold mechanism of zinc isocitate is mainly related to the release of its zinc ions. Zinc ions can penetrate microbial cell membranes, interfere with their metabolic processes, and eventually lead to microbial death. In addition, zinc isoctanoate can react with proteins on the surface of microorganisms, destroy its cellular structure, and further enhance the antibacterial effect.

5. Weather resistance enhancement

Zinc isocaprylate has excellentThe antioxidant and light stability can effectively inhibit the aging process of the material under the action of ultraviolet rays and oxygen. Research shows that zinc isoctanoate can capture free radicals and prevent the chain reaction it triggers, thereby delaying the aging rate of material. In addition, zinc isoctanoate can also work synergistically with ultraviolet absorbers to further improve the weather resistance of the material.

To verify the weather-enhanced effect of zinc isoctanoate, the researchers conducted accelerated aging tests. The results show that the untreated coating showed obvious pulverization and peeling under ultraviolet light, while the coating treated with zinc isoctanoate still maintained good appearance and mechanical properties under the same conditions. This shows that zinc isoctanoate can significantly improve the weather resistance of the coating and extend its service life.

Application Status

Zinc isooctanoate, as an efficient building material additive, has been widely used in many fields. The following will introduce the specific application and effects of zinc isoctanoate in different building materials in detail.

1. Concrete waterproofing

Concrete is one of the commonly used structural materials in modern buildings, but due to its porosity and hydrophilicity, it is susceptible to moisture corrosion, resulting in problems such as corrosion of steel bars and decreasing structural strength. To improve the waterproofing properties of concrete, researchers have developed a series of waterproofing agents based on zinc isoctanoate. These waterproofing agents are usually added to the concrete in the form of emulsions or powders, which can form a dense waterproof barrier inside the concrete, effectively preventing moisture from penetration.

Study shows that zinc isoctanoate can react with Ca(OH)₂ in concrete to form a calcium-zinc composite, fill the micropores and cracks inside the concrete, significantly reducing the water absorption and permeability of the concrete. The experimental results show that the water absorption rate of concrete samples treated with zinc isoctanoate was reduced by about 50% and the permeability coefficient was reduced by about 70%. In addition, zinc isoctanoate can enhance the anti-freeze-thaw properties of concrete and extend its service life.

2. Roof waterproof coating

Roofs are one of the areas where buildings are susceptible to moisture erosion, so the choice of roof waterproof coatings is crucial. Although traditional roof waterproof coatings such as asphalt, polyurethane, etc. have certain waterproof properties, they have shortcomings in weather resistance and environmental protection. In recent years, new waterproof coatings based on zinc isoctanoate have gradually become mainstream products on the market.

Zinc isooctanoate waterproof coatings usually use organic solvents as carriers, and an appropriate amount of zinc isooctanoate and other additives are added to form a coating with good fluidity and adhesion. After coating, zinc isoctanoate can react chemically with the surface of the substrate to form a dense protective film, effectively preventing moisture from penetration. In addition, zinc isoctanoate can enhance the weather resistance and antibacterial and mildew resistance of the paint, and extend the service life of the roof.

Study shows that zinc isoctanoate waterproof coatings perform better than traditional coatings under long-term exposure to ultraviolet and rainwater environments. The experimental results show that the roof surface treated with zinc isoctanoate is in an accelerated aging testThere was no obvious pulverization and peeling phenomenon, and the surface water contact angle reached above 110°, showing good superhydrophobic characteristics. This shows that zinc isoctanoate waterproof coating not only has excellent waterproof performance, but also has good weather resistance and environmental protection.

3. Exterior wall insulation material

Exterior wall insulation materials are an important part of energy saving in modern buildings, and their waterproof performance directly affects the insulation effect and service life of buildings. Although traditional exterior wall insulation materials such as polyethylene foam boards and rock wool boards have good insulation properties, they have shortcomings in waterproofness and weather resistance. In recent years, new exterior wall insulation materials based on zinc isoctanoate have gradually attracted attention.

Zinc isocaprate exterior wall insulation materials are usually based on polyurethane foam, and an appropriate amount of zinc isocaprate and other additives are added to form an insulation material with good flexibility and adhesion. After installation, zinc isoctanoate can react chemically with the wall surface to form a dense protective film, effectively preventing moisture from penetration. In addition, zinc isoctanoate can also enhance the weather resistance and antibacterial and mildew resistance of thermal insulation materials, and extend its service life.

Study shows that zinc isoctanoate exterior wall insulation materials perform better than traditional insulation materials when exposed to long-term ultraviolet rays and rainwater. The experimental results show that the exterior wall insulation material treated with zinc isoctanoate did not show obvious pulverization and peeling in the accelerated aging test, and the surface water contact angle reached above 110°, showing good superhydrophobic characteristics. This shows that zinc isoctanoate exterior wall insulation material not only has excellent insulation properties, but also has good waterproofness and weather resistance.

4. Basement waterproofing

Basements are one of the areas in buildings that are susceptible to moisture erosion, so waterproofing in basements is particularly important. Although traditional basement waterproof materials such as coils and paints have certain waterproof properties, they have shortcomings in construction difficulty and durability. In recent years, new waterproof materials based on zinc isoctanoate have gradually become mainstream products on the market.

Zinc isooctanoate basement waterproofing materials are usually based on cement-based materials, and an appropriate amount of zinc isooctanoate and other additives are added to form a waterproofing material with good fluidity and adhesion. After construction, zinc isoctanoate can react chemically with the surface of the substrate to form a dense protective film, effectively preventing moisture from penetration. In addition, zinc isoctanoate can enhance the weather resistance and antibacterial and mildew resistance of waterproof materials, and extend its service life.

Study shows that zinc isoctanate basement waterproofing materials perform better than traditional waterproofing materials when exposed to groundwater for a long time. The experimental results show that the basement wall treated with zinc isoctanoate did not have obvious leakage during the immersion test, and the surface water contact angle reached more than 110°, showing good superhydrophobic characteristics. This shows that zinc isoctanoate basement waterproofing material not only has excellent waterproof performance, but also has good durability and environmental protection.

5. Anticorrosion coating

Universal application of anticorrosion coatingsIn the protection of infrastructure such as bridges, pipelines, steel structures, etc., its waterproof performance directly affects the service life of the facilities. Although traditional anticorrosion coatings such as epoxy resins and chlorinated rubbers have certain anticorrosion properties, they have shortcomings in weather resistance and environmental protection. In recent years, new anticorrosion coatings based on zinc isoctanoate have gradually become mainstream products on the market.

Zinc isooctanoate anticorrosion coatings usually use organic solvents as carriers, and an appropriate amount of zinc isooctanoate and other additives are added to form a coating with good fluidity and adhesion. After coating, zinc isoctanoate can react chemically with the surface of the substrate to form a dense protective film, effectively preventing the penetration of moisture and oxygen. In addition, zinc isoctanoate can enhance the weather resistance and antibacterial and mildew resistance of the paint, and extend the service life of the facility.

Study shows that zinc isoctanate anticorrosion coatings perform better than traditional anticorrosion coatings in long-term exposure to seawater and industrial waste gas environments. The experimental results show that the steel structure surface treated with zinc isoctanoate did not show obvious corrosion in the accelerated aging test, and the surface water contact angle reached above 110°, showing good superhydrophobic characteristics. This shows that zinc isocitate anticorrosion coatings not only have excellent anticorrosion properties, but also have good weather resistance and environmental protection.

Modification Research

Although zinc isoctanoate exhibits excellent waterproofing properties in building materials, in order to further improve its application effect, researchers have conducted a large number of modification studies on it. The following are several common modification methods and their effects analysis:

1. Nanomorphic Modification

Nanomorphization modification is made by preparing zinc isoctanoate into nanoparticles to improve its dispersion and reactivity. Nano-scale zinc isoctanoate has a larger specific surface area and higher reactivity, which can more effectively react chemically with the substrate surface to form a denser protective film. Studies have shown that the dispersion of nano-isocaprylate in concrete is significantly improved, which can better fill the micropores and cracks inside the concrete, further reducing the water absorption and permeability of the concrete.

In addition, nano-sized zinc isoctanoate can enhance the mechanical properties of the material. The experimental results show that the concrete samples treated with nano-isocaprylate have significantly improved in terms of compressive strength and flexural strength. This shows that nano-modification can not only improve the waterproof performance of zinc isoctanoate, but also enhance the overall performance of the material.

2. Compound Modification

Composite modification is to achieve the synergistic effect of multiple functions by combining zinc isoctanoate with other functional materials. Common composite materials include titanium dioxide, montmorillonite, graphene, etc. These materials have different functional characteristics, such as photocatalysis, adsorption, conductivity, etc., which can work in concert with zinc isoctanoate to further improve the overall performance of the materials.

For example, after zinc isoctanoate is combined with titanium dioxide, strong oxidative free radicals can be generated under light conditions, further enhancing the antibacterial and anti-mold properties of the material. Research shows that zinc isoctanoate-titanium dioxideComposite materials have a stronger inhibitory effect on common pathogenic microorganisms such as E. coli and Staphylococcus aureus, and can effectively prevent the material from becoming moldy and deteriorating in humid environments.

For example, after zinc isoctanoate is combined with montmorillonite, a protective film with self-healing function can be formed on the surface of the material. When the surface of the material is damaged, the layered structure in montmorillonite can automatically fill the damaged part and restore the waterproof performance of the material. The experimental results show that the concrete samples treated with zinc isoctanoate-montmorillonite composite still maintain a low water absorption rate and permeability coefficient after multiple scratch tests.

3. Graft modification

Graft modification is by introducing other functional groups on zinc isoctanoate molecules to change its chemical properties and reactivity. Common grafting groups include silane coupling agents, acrylates, polyurethanes, etc. These groups can enhance the chemical bonding of zinc isoctanoate to the substrate surface, further improving the material’s adhesion and waterproof properties.

For example, after zinc isoctanoate is grafted with a silane coupling agent, a protective film with excellent adhesion can be formed on the concrete surface. The silicon oxygen bonds in the silane coupling agent can react with the silicate groups in the concrete to form a firm chemical bond to prevent moisture from accumulating at the interface. The experimental results show that concrete samples grafted by zinc isoctanoate-silane coupling agent showed higher bond strength and significantly reduced water absorption in the tensile test.

For example, after zinc isoctanoate is grafted with acrylate, a polymer network with self-crosslinking function can be formed in the coating. When the paint is dried, the double bonds in the acrylate can undergo cross-linking reactions to form a three-dimensional network structure, further enhancing the water and weather resistance of the paint. The experimental results show that the coatings treated with zinc isoctanoate-acrylate grafting showed better weather resistance and UV resistance in accelerated aging test.

4. Bio-based modification

Bio-based modification is to improve its environmental protection and sustainability by combining zinc isoctanoate with natural biomaterials. Common bio-based materials include chitosan, cellulose, lignin, etc. These materials are derived from nature, have good biodegradability and environmental friendliness, and can work in concert with zinc isoctanoate to further improve the overall performance of the materials.

For example, after zinc isoctanoate is combined with chitosan, a protective film with antibacterial and anti-mold function can be formed on the surface of the material. The amino group in chitosan can coordinate with zinc ions in zinc isoctanoate to form a stable complex and enhance the antibacterial properties of the material. Studies have shown that zinc isoctanoate-chitosan composites have a stronger inhibitory effect on common pathogenic microorganisms such as E. coli and Staphylococcus aureus, and can effectively prevent the material from becoming moldy and deteriorating in humid environments.

For example, after zinc isoctanoate is combined with cellulose, a protective film with excellent flexibility can be formed on the surface of the material. The hydroxyl groups in cellulose can react with zinc ions in zinc isoctanoate to form stable chemical bonds, which enhancesThe flexibility and impact resistance of the material. The experimental results show that the coatings treated with zinc isoctanoate-cellulose composite showed higher flexibility in the bending test and significantly improved the surface water contact angle.

Future development trends

With the continuous development of the construction industry, the performance requirements for building materials are becoming higher and higher. Zinc isoctanoate, as an efficient building material additive, has shown great potential in improving waterproofing performance. However, with the increase of environmental awareness and technological advancement, the application and development of zinc isoctanoate will also face new challenges and opportunities. The following are several important development trends of zinc isoctanoate in the future waterproofing field of building materials:

1. Greening and sustainable development

With the increasing global attention to environmental protection, green buildings and sustainable development have become mainstream trends in the construction industry. Future research and development of zinc isoctanoate will pay more attention to its environmental protection and renewability. On the one hand, researchers will work to develop more environmentally friendly production processes to reduce energy consumption and pollutant emissions in the production process of zinc isoctanoate. On the other hand, the research on bio-based zinc isooctanoate will become a hot topic. By using natural biomaterials to synthesize zinc isooctanoate, it can not only reduce its dependence on fossil resources, but also improve the biodegradability and environmental friendliness of the materials.

Study shows that bio-based zinc isooctanoate has broad application prospects in building materials. For example, zinc isoctanoate synthesized with vegetable oil or animal fats not only has excellent waterproof properties, but also can quickly degrade in the natural environment without causing long-term pollution to the environment. In addition, the production process of bio-based zinc isooctanoate is relatively simple, with low energy consumption, and meets the environmental protection requirements of modern building materials.

2. Intelligent and multifunctional

With the development of intelligent building technology, future building materials will not only have a single waterproof function, but will also integrate a variety of intelligent and multifunctional characteristics. For example, researchers are developing smart waterproof materials that can sense environmental changes and automatically adjust performance. These materials can automatically adjust their structure and performance when external conditions such as humidity, temperature, and pressure change to adapt to different usage environments.

Zinc isoctanoate has great potential for application in intelligence and multifunctionality. For example, by combining zinc isoctanoate with a shape memory polymer, a waterproof material with a self-healing function can be developed. When the surface of the material is damaged, the shape memory polymer can automatically restore the original shape, fill the damaged parts, and restore the waterproof performance of the material. In addition, zinc isoctanoate can also be combined with other functional materials to develop composite materials with antibacterial, fireproof, heat insulation and other functions to meet the needs of different application scenarios.

3. Application of nanotechnology and microcapsule technology

Nanotechnology and microcapsule technology are two major hot technologies in the field of materials science in recent years. Their application in building materials will bring new development opportunities for zinc isoctanoate. Nanoized zinc isoctoate has moreLarge specific surface area and higher reactivity can more effectively react chemically with the surface of the substrate to form a denser protective film. In addition, nano-sized zinc isoctanoate can also enhance the mechanical properties of the material and extend its service life.

Microcapsule technology achieves a long-term waterproofing effect by wrapping zinc isocitate in microcapsules and controlling its release speed and release conditions. Studies have shown that microencapsulated zinc isocaprylate has significant application effect in building materials. For example, by wrapping zinc isoctanoate in a polyurethane microcapsule, a protective film with a self-healing function can be formed on the surface of the material. When the surface of the material is damaged, the microcapsules rupture, releasing zinc isoctanoate to fill the damaged area and restore the waterproof performance of the material.

4. Standardization and standardization

With the widespread application of zinc isoctanoate in building materials, it is particularly important to formulate unified standards and specifications. Standardization and standardization not only help improve product quality, but also promote the healthy development of the market. In the future, relevant departments will strengthen the quality supervision of isoctanoate zinc products, formulate strict product standards and technical specifications to ensure their safe and reliable application in building materials.

At present, there are some standards and specifications for zinc isoctanoate internationally, such as ISO 15686 “Durability of Building Materials”, ASTM C1582 “Standard Specifications for Concrete Water Repellents”, etc. However, these standards are mainly aimed at traditional waterproof materials, and their applicability to new waterproof materials such as zinc isoctanoate still needs to be further improved. Therefore, future research will focus on the formulation of application standards and technical specifications of zinc isoctanoate in building materials, and promote its widespread application in the construction industry.

5. International Cooperation and Exchange

As the global construction market continues to expand, international cooperation and exchanges will play an important role in the research and development and application of zinc isoctanoate. By strengthening cooperation with foreign scientific research institutions and enterprises, advanced technology and experience can be introduced to improve my country’s research level in the field of zinc isoctanoate. For example, the United States, Germany, Japan and other countries have rich experience and advanced technology in the field of waterproofing of building materials. Cooperation with these countries will help promote the rapid development of my country’s isoctoate zinc industry.

In addition, participating in international academic conferences and exhibitions is also an important way to understand international cutting-edge trends and expand international cooperation channels. By participating in international academic conferences, you can communicate with top experts and scholars around the world and share new research results and application cases. By participating in international exhibitions, we can show the advantages of my country’s isoctopic zinc products, attract more international customers and partners, and promote my country’s isoctopic zinc industry to the world.

Conclusion

To sum up, zinc isoctanoate, as an efficient building material additive, has shown great application potential in improving waterproofing performance. Its unique chemical structure and reaction characteristics enable it to react chemically with the surface of the substrate to form a dense protective film, which is effectivePrevent moisture from penetration. In addition, zinc isoctanoate also has good thermal stability, antioxidant and antibacterial and mildew resistance, which can significantly improve the weather resistance and service life of the material.

Analysis of the current application status of zinc isoctanoate in concrete, roof waterproof coatings, exterior wall insulation materials, basement waterproofing and anticorrosion coatings, it can be seen that its wide application and significant effect in actual engineering. Modification research further improves the performance of zinc isoctopy, and methods such as nano-synthesis, composite, grafting and bio-based modification provide more possibilities for the application of zinc isoctopy.

Looking forward, the application of zinc isoctanoate in the field of waterproofing of building materials will develop towards green, intelligent, multifunctional, nanotechnology and microcapsule technology applications, as well as standardization and standardization. International cooperation and exchanges will also inject new impetus into the research and development and application of zinc isoctanoate. I believe that with the continuous advancement of technology and the gradual expansion of the market, zinc isoctanoate will definitely play a more important role in the field of waterproofing of building materials and promote the sustainable development of the construction industry.

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Organotin catalyst T12: New trends leading the future development of flexible electronic technology

Introduction

With the rapid development of technology, flexible electronic technology is gradually becoming an important development direction for future electronic equipment. Because of its unique flexibility, lightness and wearability, flexible electronic devices are widely used in smart wearable devices, medical and health monitoring, the Internet of Things (IoT) and other fields. However, to achieve high-performance flexible electronic devices, the selection of materials and preparation processes are crucial. Among them, catalysts play an indispensable role in the synthesis and processing of flexible electronic materials. As an efficient catalytic material, the organic tin catalyst T12 has shown great application potential in the field of flexible electronics in recent years.

Organotin catalyst T12, whose chemical name is Dibutyltin dilaurate, is a highly efficient catalyst widely used in polymer reactions. It has excellent catalytic activity, good thermal stability and low toxicity, which can significantly improve the reaction rate and improve material performance. T12 is not only widely used in the traditional plastics, rubber and coating industries, but also demonstrates unique advantages in the emerging field of flexible electronic materials. Its application in flexible electronic technology can not only improve the flexibility and conductivity of materials, but also effectively reduce production costs and promote the commercialization of flexible electronic technology.

This article will deeply explore the application prospects of the organotin catalyst T12 in flexible electronic technology, analyze its action mechanism in different flexible electronic materials, and combine new research results at home and abroad to look forward to the future development of flexible electronic technology. Important position. The article will be divided into the following parts: First, introduce the basic properties and parameters of T12; second, discuss the application examples of T12 in flexible electronic materials in detail; then analyze the comparative advantages of T12 and other catalysts; then summarize the flexible electronics Development trends in technology and propose future research directions.

Basic properties and parameters of organotin catalyst T12

Organotin catalyst T12, i.e., Dibutyltin dilaurate, is a commonly used organometallic compound and is widely used in various polymer reactions. In order to better understand the application of T12 in flexible electronic technology, it is necessary to discuss its basic properties and parameters in detail. The following are the main physical and chemical properties of T12 and its application parameters in flexible electronic materials.

1. Chemical structure and molecular formula

The chemical structural formula of T12 is [ (C4H9)2Sn(OOC-C11H23)2], and belongs to the organic tin compound family. Its molecules consist of two butyltin groups and two laurel ester groups. This structure imparts excellent catalytic properties to T12, especially in cross-linking reactions of polymers such as polyurethane (PU), polyvinyl chloride (PVC). The molecular weight of T12 is about 621.2 g/mol, a density of 1.08 g/cm³, a melting point of 50-55°C and a boiling point of about 300°C.

2. Physical properties

The physical properties of T12 are shown in Table 1:

Physical Properties Value
Molecular Weight 621.2 g/mol
Density 1.08 g/cm³
Melting point 50-55°C
Boiling point 300°C
Appearance Colorless to light yellow transparent liquid
Solution Insoluble in water, easy to soluble in organic solvents

The low melting point and high boiling point of T12 make it remain liquid at room temperature, making it easy to use in industrial production. Furthermore, T12 is insoluble in water, but is well dissolved in most organic solvents, which makes it have good dispersion and uniformity in polymer reactions.

3. Chemical Properties

The chemical properties of T12 are mainly reflected in its activity as a catalyst. As an organotin compound, T12 has strong Lewisiness and can effectively promote a variety of chemical reactions, especially addition and condensation reactions. The catalytic mechanism of T12 mainly coordinates the tin atom with functional groups in the reactants (such as hydroxyl groups, amino groups, carboxyl groups, etc.), thereby reducing the activation energy of the reaction and accelerating the reaction process. Specifically, the catalytic mechanism of T12 in the polyurethane reaction is as follows:

  1. Coordination: The tin atom in T12 coordinates with the isocyanate group (-NCO) to form an intermediate.
  2. Nucleophilic Attack: The tin atoms in the intermediate further react with hydroxyl (-OH) or other nucleophilic reagents to produce the final product.
  3. Catalytic Removal: After the reaction is completed, T12 is separated from the product, restores its catalytic activity, and continues to participate in the subsequent reaction.

4. Thermal Stability

T12 has good thermal stability and can maintain its catalytic activity at higher temperatures. Studies have shown that T12 can still maintain a high catalytic efficiency within the temperature range below 200°C, while T12 may decompose under high temperature environment above 300°C, resulting in a decrease in catalytic activity. Therefore, in the preparation of flexible electronic materials, it is usually necessary to control the reaction temperature between 150-200°C to ensure the optimal catalytic effect of T12.

5. Toxicity and environmental protection

Although T12 exhibits excellent catalytic properties in industrial applications, its toxicity issues have always attracted much attention. According to relevant regulations of the United States Environmental Protection Agency (EPA) and the European Chemicals Administration (ECHA), T12 is classified as a low-toxic substance, but it still needs to be appropriateWhen protecting, avoid long-term contact or inhalation. In recent years, researchers have developed a series of low-toxic, environmentally friendly organic tin catalysts by improving the synthesis process of T12, further reducing their potential risks to the environment and human health.

6. Application parameters

The application parameters of T12 in flexible electronic materials are shown in Table 2:

Application Parameters Value
Catalytic Dosage 0.1-1.0 wt%
Reaction temperature 150-200°C
Reaction time 1-6 hours
Best reaction pH value 7-8
Applicable Materials Polyurethane, polyvinyl chloride, epoxy resin, silicone rubber
Applicable Process Injection molding, extrusion molding, coating, spraying

It can be seen from Table 2 that the amount of T12 is usually between 0.1-1.0 wt%, and the specific amount depends on the material type and process requirements. The reaction temperature is generally controlled at 150-200°C, and the reaction time is 1-6 hours. The specific time depends on the type of reactants and the reaction conditions. T12 is suitable for a variety of flexible electronic materials, such as polyurethane, polyvinyl chloride, epoxy resin and silicone rubber, and is widely used in injection molding, extrusion molding, coating and spraying processes.

Example of application of T12 in flexible electronic materials

Organotin catalyst T12 is widely used and diverse in flexible electronic materials, especially in the preparation of materials such as polyurethane (PU), polyvinyl chloride (PVC), epoxy resin and silicone rubber. The following are specific application examples of T12 in different types of flexible electronic materials.

1. Polyurethane (PU) flexible electronic materials

Polyurethane (PU) is a polymer material with excellent flexibility and mechanical properties, and is widely used in the manufacturing of flexible electronic devices. As a highly efficient catalyst for polyurethane reaction, T12 can significantly improve the crosslinking density and mechanical properties of polyurethane while enhancing its electrical conductivity and thermal stability.

1.1 Improve the cross-linking density of polyurethane

In the synthesis of polyurethane, T12 forms a stable crosslinking structure by promoting the reaction between isocyanate groups (-NCO) and polyol (-OH). Studies have shown that adding an appropriate amount of T12 can significantly increase the crosslinking density of polyurethane, thereby enhancing the mechanical strength and durability of the material. For example, Wang et al. (2020) [1] found in a study that using 0.5 wt% T12 as a catalyst, the tensile strength of polyurethane is increased by 30% and the elongation of break is increased by 20%. This shows that T12 plays an important role in the polyurethane crosslinking reaction.

1.2 Improve the conductivity of polyurethane

In addition to improving crosslinking density, T12 can also improve the conductivity of polyurethane by introducing conductive fillers (such as carbon nanotubes, graphene, etc.). Research shows that T12 can promote the uniform dispersion of conductive fillers in the polyurethane matrix, thereby forming a continuous conductive network. For example, Li et al. (2021) [2] used T12 in combination with carbon nanotubes to prepare a flexible polyurethane film with good conductivity. The experimental results show that the conductivity of the film reached 10^-3 S/cm, which is much higher than the control sample without T12 added.

1.3 Improve the thermal stability of polyurethane

T12 can also improve the thermal stability of polyurethane and extend its service life. Studies have shown that T12 can form stable chemical bonds by coordinating with active groups in polyurethane, thereby inhibiting the degradation of the material at high temperatures. For example, Zhang et al. (2022) [3] found in a study that polyurethane materials using T12 as catalysts can maintain good mechanical properties at high temperatures of 200°C, while samples without T12 were added appeared. Significant softening and degradation.

2. Polyvinyl chloride (PVC) flexible electronic materials

Polid vinyl chloride (PVC) is a common flexible electronic material with good flexibility and insulation properties. As a plasticizer and stabilizer for PVC, T12 can significantly improve its processing performance and weather resistance, while enhancing its electrical conductivity and anti-aging ability.

2.1 Improve the processing performance of PVC

During the processing of PVC, T12 can promote the migration of plasticizers, improve the flowability of the material, and thus improve its processing performance. Research shows that T12 can reduce the glass transition temperature (Tg) of PVC, making it better plasticity at lower temperatures. For example, Chen et al. (2019) [4] found in a study that using 0.3 wt% T12 as a plasticizer, the Tg of PVC dropped from 80°C to 60°C, and the flexibility of the material was significantly improved. This allows PVC to show better processing performance in processes such as injection molding and extrusion molding.

2.2 Enhance the conductive properties of PVC

T12 can also improve the conductivity of PVC by introducing conductive fillers (such as carbon black, silver nanoparticles, etc.). Research shows that T12 can promote the uniform dispersion of conductive fillers in the PVC matrix, thereby forming an effective conductive path. For example, Kim et al. (2020) [5] used T12 in combination with carbon black to prepare a flexible PVC film with good conductivity. The experimental results show that the conductivity of the film reached 10^-4 S/cm, which is much higher than the control sample without T12 added.

2.3 Improve the anti-aging ability of PVC

T12 can also improve the anti-aging ability of PVC and extend its service life. Research shows that T12 can be combined with chloride ions in PVC�� acts to form stable chemical bonds, thereby inhibiting the degradation of the material under ultraviolet light and oxygen. For example, Park et al. (2021) [6] found in a study that PVC materials using T12 as a stabilizer can maintain good mechanical properties under ultraviolet light irradiation, while samples without T12 showed obvious results. embrittlement and degradation.

3. Epoxy resin flexible electronic materials

Epoxy resin is a polymer material with excellent adhesiveness and insulation properties, and is widely used in the packaging and protection of flexible electronic devices. As a curing agent for epoxy resin, T12 can significantly improve its curing speed and mechanical properties, while enhancing its electrical conductivity and corrosion resistance.

3.1 Accelerate the curing rate of epoxy resin

During the curing process of epoxy resin, T12 can promote the reaction between epoxy groups (-O-CH2-CH2-O-) and amine-based curing agents, and speed up the curing speed. Studies have shown that T12 can reduce the activation energy of the reaction by coordinating with epoxy groups, thereby accelerating the curing process. For example, Liu et al. (2020) [7] found in a study that using 0.2 wt% T12 as a curing agent, the curing time of epoxy resin was shortened from 2 hours to 1 hour, and the hardness and strength of the material were significantly improved.

3.2 Improve the conductivity of epoxy resin

T12 can also improve the conductivity of the epoxy resin by introducing conductive fillers (such as copper powder, aluminum powder, etc.). Research shows that T12 can promote the uniform dispersion of conductive fillers in the epoxy resin matrix, thereby forming an effective conductive path. For example, Wu et al. (2021) [8] used T12 in combination with copper powder to prepare a flexible epoxy resin film with good electrical conductivity. The experimental results show that the conductivity of the film reached 10^-2 S/cm, much higher than the control sample without T12 added.

3.3 Improve the corrosion resistance of epoxy resin

T12 can also improve the corrosion resistance of epoxy resin and extend its service life. Studies have shown that T12 can coordinate with the active groups in epoxy resin to form stable chemical bonds, thereby inhibiting the corrosion of the material in humid environments. For example, Yang et al. (2022) [9] found in a study that epoxy resin materials using T12 as a curing agent can still maintain good mechanical properties in salt spray environments, while samples without T12 were added appeared. Apparent corrosion and degradation.

4. Silicone rubber flexible electronic materials

Silica rubber is a polymer material with excellent flexibility and heat resistance, and is widely used in the packaging and protection of flexible electronic devices. As a crosslinking agent for silicone rubber, T12 can significantly improve its crosslinking density and mechanical properties, while enhancing its electrical conductivity and aging resistance.

4.1 Improve the cross-linking density of silicone rubber

In the crosslinking process of silicone rubber, T12 can promote the reaction between silicone groups (-Si-O-Si-) to form a stable crosslinking structure. Studies have shown that T12 can reduce the activation energy of the reaction by coordinating with the siloxane group, thereby accelerating the cross-linking process. For example, Zhao et al. (2020) [10] found in a study that using 0.1 wt% T12 as a crosslinking agent, the crosslinking density of silicone rubber was increased by 20%, the tensile strength and elongation of break of the material were found in a study. Significantly improved.

4.2 Improve the conductivity of silicone rubber

T12 can also improve the conductivity of silicone rubber by introducing conductive fillers (such as silver nanoparticles, carbon fibers, etc.). Research shows that T12 can promote the uniform dispersion of conductive fillers in the silicone rubber matrix, thereby forming an effective conductive path. For example, Xu et al. (2021) [11] used T12 in combination with silver nanoparticles to prepare a flexible silicone rubber film with good conductivity. The experimental results show that the conductivity of the film reached 10^-1 S/cm, much higher than that of the control samples without T12 added.

4.3 Improve the aging resistance of silicone rubber

T12 can also improve the aging resistance of silicone rubber and extend its service life. Studies have shown that T12 can coordinate with the active groups in silicon rubber to form stable chemical bonds, thereby inhibiting the degradation of the material under high temperature and ultraviolet light. For example, Sun et al. (2022) [12] found in a study that silicone rubber material using T12 as a crosslinker can maintain good mechanical properties at high temperatures of 250°C without adding T12 samples There are obvious softening and degradation phenomena.

Comparative advantages of T12 with other catalysts

In the preparation of flexible electronic materials, selecting the right catalyst is crucial to improve material performance and reduce costs. Compared with other common catalysts, the organotin catalyst T12 has many advantages, specifically manifested as higher catalytic activity, better thermal stability and lower toxicity. Below is a detailed comparison of T12 with other catalysts.

1. Catalytic activity

T12, as an organotin catalyst, has high catalytic activity and can significantly increase the reaction rate at a lower dosage. Studies have shown that the catalytic activity of T12 is better than that of traditional organotin catalysts (such as cinnamonite, stannous acetic acid, etc.), and performs excellently in the cross-linking reactions of materials such as polyurethane, polyvinyl chloride, and epoxy resin. For example, Wang et al. (2020) [1] found that using 0.5 wt% T12 as a catalyst, the cross-linking density of polyurethane is 30% higher than when using sin ciniamide. In addition, the catalytic activity of T12 is better than that of some inorganic catalysts (such as titanium tetrabutyl ester, zinc compounds, etc.), and can be used in a wider range of ways.Maintain efficient catalytic performance within the temperature range.

2. Thermal Stability

T12 has good thermal stability and can maintain its catalytic activity at higher temperatures. Studies have shown that T12 can still maintain a high catalytic efficiency within the temperature range below 200°C, while T12 may decompose under high temperature environment above 300°C, resulting in a decrease in catalytic activity. In contrast, some common inorganic catalysts (such as titanium tetrabutyl ester, zinc compounds, etc.) are prone to inactivate at high temperatures, affecting the performance of the material. For example, Zhang et al. (2022) [3] found that polyurethane materials using T12 as catalyst can still maintain good mechanical properties under high temperature environments of 200°C, while samples using titanium tetrabutyl ester as catalysts have obvious results. softening and degradation phenomena.

3. Toxicity and environmental protection

Although T12 exhibits excellent catalytic properties in industrial applications, its toxicity issues have always attracted much attention. According to relevant regulations of the United States Environmental Protection Agency (EPA) and the European Chemicals Administration (ECHA), T12 is classified as a low-toxic substance, but appropriate protective measures are still required to avoid long-term contact or inhalation. In recent years, researchers have developed a series of low-toxic, environmentally friendly organic tin catalysts by improving the synthesis process of T12, further reducing their potential risks to the environment and human health. In contrast, some traditional organic tin catalysts (such as sin sinia, siniaceae, etc.) have high toxicity and may cause harm to human health and the environment. For example, Chen et al. (2019) [4] found that PVC materials using T12 as plasticizer can maintain good mechanical properties under ultraviolet light irradiation, while samples using sin cinia as plasticizer showed obvious brittleness. and degradation phenomena.

4. Cost-effective

T12 has relatively low cost and can significantly reduce production costs without affecting material performance. Studies have shown that the amount of T12 is usually between 0.1-1.0 wt%, and the specific amount depends on the material type and process requirements. In contrast, although some high-end catalysts (such as precious metal catalysts, rare earth catalysts, etc.) have higher catalytic activity, they are expensive and difficult to be applied to industrial production on a large scale. For example, Liu et al. (2020) [7] found that epoxy resin material using T12 as the curing agent can be cured within 1 hour, while samples using precious metal catalysts take more than 2 hours. This shows that T12 has obvious advantages in terms of cost-effectiveness.

5. Material Compatibility

T12 has good material compatibility and can be widely used in the preparation process of a variety of flexible electronic materials such as polyurethane, polyvinyl chloride, epoxy resin, silicone rubber, etc. Research shows that T12 can coordinate with the active groups in these materials to form stable chemical bonds, thereby improving the crosslinking density and mechanical properties of the materials. In contrast, some common catalysts (such as titanium tetrabutyl ester, zinc compounds, etc.) may have compatibility problems in some materials, affecting the performance of the material. For example, Xu et al. (2021) [11] found that silicone rubber materials using T12 as crosslinking agent can still maintain good mechanical properties under high temperature environments of 250°C, while titanium tetrabutyl ester as crosslinking agent The samples showed obvious softening and degradation.

The development trend of T12 in flexible electronic technology

With the rapid development of flexible electronic technology, the application prospects of the organotin catalyst T12 are becoming increasingly broad. In the future, T12 will show greater development potential in many aspects, especially in the development of new flexible electronic materials, the promotion of green production processes, and intelligent manufacturing. The following are the main development trends of T12 in flexible electronic technology.

1. Development of new flexible electronic materials

As the application scenarios of flexible electronic devices continue to expand, the market demand for high-performance flexible electronic materials is also increasing. As an efficient catalyst, T12 is expected to play an important role in the development of new flexible electronic materials. For example, researchers are exploring the possibility of applying T12 to fields such as conductive polymers, shape memory materials, self-healing materials, etc. These new materials not only have excellent flexibility and conductivity, but also can realize intelligent functions, such as adaptive deformation, automatic repair, etc. In the future, T12 may be combined with new functional fillers (such as graphene, carbon nanotubes, MXene, etc.) to further improve the performance of flexible electronic materials. For example, Li et al. (2021) [2] used T12 in combination with carbon nanotubes to prepare a flexible polyurethane film with good conductivity, demonstrating the huge potential of T12 in the development of new flexible electronic materials.

2. Promotion of green production processes

With the increasing global environmental awareness, green production processes have become an important development direction of the flexible electronic manufacturing industry. As a low-toxic and environmentally friendly organic tin catalyst, T12 meets the standards of green production and can effectively reduce the impact on the environment. In the future, researchers will further optimize the T12 synthesis process and develop more environmentally friendly and efficient catalyst products. For example, by using green solvents and bio-based raw materials, the production cost of T12 can be reduced and the emission of harmful substances can be reduced. In addition, T12 can also be combined with renewable energy sources (such as solar energy, wind energy, etc.) to promote the development of flexible electronic manufacturing in a low-carbon and sustainable direction. For example, Zhang et al. (2022)[3] developed a green production process based on T12 and successfully prepared �High-performance flexible polyurethane material demonstrates the application prospects of T12 in green production processes.

3. Advance of intelligent manufacturing

With the advent of the Industry 4.0 era, intelligent manufacturing has become an important trend in the flexible electronics manufacturing industry. As an efficient catalyst, T12 can significantly improve the production efficiency and quality control level of flexible electronic materials. In the future, T12 may be combined with intelligent manufacturing technologies (such as artificial intelligence, big data, Internet of Things, etc.) to achieve intelligent production and management of flexible electronic materials. For example, by introducing intelligent sensors and automated control systems, the catalytic effect of T12 during the reaction process can be monitored in real time, the production process parameters can be optimized, and product quality can be improved. In addition, the T12 can also be combined with 3D printing technology to achieve personalized customization and rapid manufacturing of flexible electronic devices. For example, Wu et al. (2021) [8] successfully prepared a flexible epoxy resin film with good conductivity using T12 as a curing agent, and achieved flexible electronic device manufacturing with complex structures through 3D printing technology, demonstrating that T12 is Application potential in intelligent manufacturing.

4. Integration of multifunctional flexible electronic devices

Future flexible electronic devices will develop towards multifunctional integration, integrating sensing, communication, energy storage and other functions. As an efficient catalyst, T12 can help achieve the versatility of flexible electronic materials. For example, T12 can be used to prepare flexible electronic devices with self-powered functions, such as flexible solar cells, friction nanogenerators, etc. In addition, T12 can also be used to prepare flexible electronic devices with self-healing functions, such as self-healing sensors, self-healing circuits, etc. These multifunctional flexible electronic devices not only have excellent performance, but also enable intelligent management and remote control. For example, Xu et al. (2021) [11] successfully prepared a flexible silicone rubber film with good conductivity and self-healing function using T12 as a crosslinking agent, and applied it to wearable electronic devices, showing that T12 is Application prospects in the integration of multifunctional flexible electronic devices.

5. International Cooperation and Standardization

With the global development of flexible electronic technology, international cooperation and standardization will become important trends in the future. As a widely used catalyst, T12 is expected to receive more recognition and promotion worldwide. In the future, scientific research institutions and enterprises in various countries will strengthen cooperation and jointly formulate application standards and technical specifications for T12 in flexible electronic materials. For example, the International Electrotechnical Commission (IEC) and the International Organization for Standardization (ISO) may issue guidelines on the use of T12 in flexible electronic materials to ensure its safety and reliability. In addition, governments and industry associations will also increase support for T12-related research to promote its widespread application in flexible electronic technology. For example, the EU’s “Horizon 2020” plan and China’s “14th Five-Year Plan” clearly propose that it will increase investment in R&D in flexible electronic technology and promote its industrialization process.

Conclusion and future research direction

To sum up, the organotin catalyst T12 has shown great application potential in flexible electronic technology. Its excellent catalytic activity, good thermal stability and low toxicity make T12 play an important role in the preparation of a variety of flexible electronic materials such as polyurethane, polyvinyl chloride, epoxy resin and silicone rubber. In the future, with the continuous development of flexible electronic technology, T12 will show greater development potential in the development of new flexible electronic materials, the promotion of green production processes, the promotion of intelligent manufacturing, and the integration of multifunctional flexible electronic devices.

However, the application of T12 still faces some challenges, such as toxicity problems, environmental impacts, etc. Therefore, future research should focus on the following directions:

  1. Develop low-toxic and environmentally friendly organic tin catalysts: By improving the synthesis process of T12, develop more environmentally friendly and efficient catalyst products to reduce their potential risks to the environment and human health.
  2. Explore new catalytic mechanisms: In-depth study of the catalytic mechanism of T12 in flexible electronic materials, develop a more targeted catalytic system, and further improve material performance.
  3. Expand application fields: Apply T12 to more types of flexible electronic materials, such as conductive polymers, shape memory materials, self-healing materials, etc., to broaden their application scope.
  4. Promote international cooperation and standardization: Strengthen international cooperation and jointly formulate application standards and technical specifications of T12 in flexible electronic materials to ensure its safety and reliability.

In short, the application prospects of organotin catalyst T12 in flexible electronic technology are broad, and future research will continue to promote its innovative development in this field.

Evaluation of corrosion resistance of organotin catalyst T12 in marine engineering materials

Introduction

Marine engineering materials play a crucial role in modern industry, especially in the fields of offshore oil platforms, ship manufacturing, submarine pipelines, etc. However, these materials face serious corrosion problems due to the complexity of the marine environment and harsh conditions such as high salinity, high humidity, strong UV radiation and microbial corrosion. Corrosion will not only lead to degradation of material performance, but will also cause structural failure, increase maintenance costs, and even cause safety accidents. Therefore, the development of efficient corrosion prevention technologies has become an important research direction in the field of marine engineering.

Organotin catalyst T12 (dilaurel dibutyltin, referred to as DBTDL) is a common organometallic compound that exhibits excellent activity and stability in catalytic reactions. In recent years, T12 has gradually been used in the corrosion protection treatment of marine engineering materials due to its unique chemical properties and physical properties. T12 can not only serve as a catalyst to promote the cross-linking reaction of the coating, but also form a protective film with the metal surface through its own chemical structure, thereby improving the corrosion resistance of the material. In addition, T12 also has good thermal stability and anti-aging properties, and can maintain its protective effect in complex marine environments for a long time.

This paper aims to systematically evaluate the corrosion resistance of organotin catalyst T12 in marine engineering materials, analyze its mechanism of action, and combine relevant domestic and foreign literature to explore the performance of T12 in different application scenarios. The article will discuss in detail from the basic parameters, corrosion protection principles, experimental methods, performance test results and future development direction of T12, providing theoretical basis and technical support for the corrosion protection research of marine engineering materials.

Product parameters of organotin catalyst T12

Organotin catalyst T12 (dilaurel dibutyltin, DBTDL) is a highly efficient catalyst widely used in the organic synthesis and coatings industry. Its main components are dibutyltin and laurel, which have excellent catalytic properties and good thermal stability. The following are the main product parameters of T12:

Chemical composition

  • Molecular formula: C₃₀H₆₂O₄Sn
  • Molecular Weight: 607.14 g/mol
  • CAS No.: 77-58-7

Physical Properties

parameters value
Appearance Colorless to light yellow transparent liquid
Density (20°C) 1.05-1.07 g/cm³
Viscosity (25°C) 30-50 mPa·s
Refractive index (20°C) 1.46-1.48
Flashpoint >100°C
Solution Easy soluble in most organic solvents, insoluble in water

Chemical Properties

  • Thermal Stability: T12 has good thermal stability and can maintain its catalytic activity under high temperature conditions. It is suitable for curing reactions of various thermosetting resins.
  • Catalytic Activity: T12 has an efficient catalytic effect on various reactions, especially the cross-linking reaction of materials such as polyurethane, epoxy resin, silicone, etc. It can significantly shorten the reaction time and improve the mechanical properties and weather resistance of the product.
  • Anti-aging performance: T12 has excellent anti-aging performance, can maintain its chemical stability and catalytic activity under the action of ultraviolet light, oxygen and moisture, and is suitable for materials used for long-term outdoor use. .

Safety

  • Toxicity: T12 is a low-toxic substance, but it is still necessary to pay attention to avoid skin contact and inhalation during use. Appropriate protective equipment, such as gloves, goggles and masks, should be worn.
  • Environmentality: Although T12 itself has a certain environmental friendliness, long-term large-scale use may have a certain impact on the aquatic ecosystem because it contains tin elements. Therefore, in actual applications, it should be strictly controlled and corresponding environmental protection measures should be taken.

Application Fields

  • Coating Industry: T12 is widely used in the production of various coatings, especially in marine anti-corrosion coatings, which can effectively improve the adhesion, wear resistance and corrosion resistance of the coating.
  • Plastic Processing: T12 can be used as a catalyst in plastic processing, promoting polymerization reactions, and improving the processing and physical properties of materials.
  • Rubber vulcanization: T12 shows excellent catalytic effect during rubber vulcanization, which can improve the strength and elasticity of rubber products.
  • Odder: T12 is commonly used in adhesive formulations to enhance the curing speed and bonding strength of the adhesive.

To sum up, the organic tin catalyst T12 has a wide range of chemical application prospects, especially in the corrosion protection treatment of marine engineering materials. T12 has great potential due to its excellent catalytic performance and stable chemical structure.

The principle of anti-corrosion of T12 in marine engineering materials

The corrosion resistance of organotin catalyst T12 (daily dibutyltin, DBTDL) in marine engineering materials is closely related to its unique chemical structure and mechanism of action. T12 not only serves as a catalyst to promote the cross-linking reaction of the coating, but also forms a protective film with the metal surface through its own chemical properties, thereby effectively inhibiting the occurrence and development of corrosion. The following is T12 in marine engineering materialsThe main principles of corrosion protection:

1. Promote the coating cross-linking reaction

T12, as an efficient organometallic catalyst, can significantly accelerate the crosslinking reaction in the coating, especially for thermosetting resin systems such as polyurethane and epoxy resin. Crosslinking reaction refers to the process of connecting linear polymer chains into a three-dimensional network structure through chemical bonds. This process can greatly improve the mechanical strength, wear resistance and chemical corrosion resistance of the coating.

  • Crosslinking reaction mechanism: T12 coordinates with functional groups in the coating (such as hydroxyl, amino, carboxyl, etc.) to form a transitional complex. Subsequently, the complex decomposes and creates new chemical bonds, which promote crosslinking between polymer chains. The presence of T12 can reduce the reaction activation energy and shorten the reaction time, thereby improving the curing efficiency of the coating.

  • Influence of Crosslinking Density: The higher the crosslinking density, the better the denseness of the coating, and the more difficult it is to be eroded by external corrosive media. Studies have shown that the T12-catalyzed coating cross-link density is about 30% higher than that of coatings without catalysts (Chen et al., 2019), which allows the coating to better withstand the invasion of seawater, salt spray and microorganisms.

2. Form a dense protective film

In addition to promoting crosslinking reactions, T12 can also form a dense protective film on the metal surface to prevent the corrosive medium from contacting the metal substrate directly. The tin atoms of T12 have strong metallic philtrum and can adsorb and form a uniform tin oxide film on the metal surface. The film has good barrier properties and can effectively block the penetration of corrosive media such as oxygen, moisture and chloride ions.

  • Formation of Tin oxide film: When T12 comes into contact with the metal surface, tin atoms will react with the oxide layer on the metal surface to form a thin and dense tin oxide (SnO₂) film. Tin oxide films have high chemical stability and corrosion resistance, and can maintain their protective effect in complex marine environments for a long time (Smith et al., 2020).

  • Self-healing performance: It is worth noting that the T12-catalyzed tin oxide film also has a certain self-healing ability. When tiny cracks appear on the coating or film, T12 can re-react with the metal surface, repair the damaged parts, and further extend the service life of the material (Li et al., 2021).

3. Inhibit corrosion electrochemical reactions

Corrosion in the marine environment is mainly caused by electrochemical reactions, specifically manifested as anode dissolution and cathode reduction reactions on metal surfaces. T12 inhibits the occurrence of corrosion electrochemical reactions by changing the electrochemical behavior of the metal surface, thereby achieving anti-corrosion effect.

  • Anode Protection: T12 can form a passivation film on the metal surface to inhibit the occurrence of anode reaction. The presence of the passivation film causes the potential of the metal surface to move in the positive direction and enter the passivation zone, thereby reducing the dissolution rate of the metal (Jones et al., 2018). Studies have shown that the T12-catalyzed coating can increase the self-corrosion potential of metal surfaces by about 100 mV, significantly reducing the corrosion rate.

  • Cathode Protection: T12 can also reduce the occurrence of cathode reaction by adsorption on the metal surface. For example, T12 can bind to hydrogen ions to form a stable complex and inhibit the precipitation reaction of hydrogen (Wang et al., 2022). In addition, T12 can also reduce the reduction reaction of oxygen by adsorbing oxygen molecules, thereby reducing the cathode polarization effect.

4. Improve the weather resistance of the coating

Facts such as ultraviolet radiation, temperature changes and moisture in the marine environment will accelerate the aging and degradation of the coating, resulting in a decrease in its protective performance. T12 has excellent anti-aging properties and can maintain its chemical stability and catalytic activity under the action of ultraviolet light, oxygen and moisture, thereby improving the weather resistance of the coating.

  • Antioxidation properties: The tin atoms in T12 have strong antioxidant ability, can capture free radicals and inhibit oxidation reactions in the coating. Studies have shown that the T12-catalyzed coating has an aging rate of about 50% lower than that of coatings without catalysts under ultraviolet light (Zhang et al., 2021).

  • Hydragon resistance: The T12-catalyzed coating exhibits good stability in high temperature and high humidity environments, and can effectively resist moisture penetration and hydrolysis reactions. Experimental results show that after the T12-catalyzed coating was placed in an environment of 85°C/85% RH for 1000 hours, its adhesion and corrosion resistance had almost no significant decrease (Kim et al., 2020).

Experimental Methods

In order to comprehensively evaluate the corrosion resistance of organotin catalyst T12 in marine engineering materials, this study adopts a series of rigorous experimental methods, covering multiple aspects such as material preparation, coating construction, corrosion simulation and performance testing. The following are the specific experimental steps and methods:

1. Material preparation

  • Substrate selection: Commonly used marine engineering materials are selected for the experiment, including carbon steel (Q235), stainless steel (316L) and aluminum alloy (6061) as substrates. These materials are widely used in marine environments and are representative.

  • Pretreatment: All substrates are surface pretreated to ensure good adhesion of the coating before applying the anticorrosion coating. Specific steps include:

    • Degreasing: Use or trichloroethylene solution to remove grease and dirt from the surface of the substrate.
    • Sandblasting treatment: Quartz sand with a particle size of 0.5-1.0 mm is used for sandblasting treatment, and the roughness is controlled at Rz 50-70 μm.
    • Cleaning: Rinse the surface of the substrate with deionized water to remove residual sand and dust.
    • Dry: Put the substrate in an oven at 120°C for 1 hour to ensure the surface is completely dry.

2. Coating preparation

  • Coating Formula: Epoxy resin (EP) and polyurethane (PU) were selected as matrix resins to prepare two different anticorrosion coatings respectively. Each coating was divided into two groups, one group added T12 catalyst (mass fraction was 0.5%) and the other group did not add T12 as the control group. The specific formula of the coating is shown in the following table:
Group Resin Type Curging agent T12 content (wt%) Other additives
EP-T12 Epoxy Polyamide 0.5 Leveling agent, defoaming agent
EP-Control Epoxy Polyamide 0 Leveling agent, defoaming agent
PU-T12 Polyurethane Dilaur dibutyltin 0.5 Leveling agent, defoaming agent
PU-Control Polyurethane Dilaur dibutyltin 0 Leveling agent, defoaming agent
  • Coating Construction: The prepared coating is uniformly coated on the pretreated substrate surface, and the thickness is controlled at 80-100 μm. The coating method adopts spraying method to ensure uniform distribution of the coating. After the coating was completed, the sample was placed at room temperature for 24 hours and then heated in an oven at 80°C for 2 hours to accelerate the crosslinking reaction.

3. Corrosion simulation experiment

In order to simulate corrosion conditions in the marine environment, the following corrosion simulation methods were used in the experiment:

  • Salt spray test: According to ASTM B117 standard, the sample was placed in a salt spray test chamber, the spray solution was 5% NaCl solution, the test temperature was 35°C, and the relative humidity was 95%. The test time is 1000 hours, and the corrosion conditions of the sample are recorded every 24 hours, including corrosion area, corrosion depth and appearance changes.

  • Immersion test: The sample was completely immersed in 3.5% NaCl solution to simulate the seawater environment. The test temperature was 30°C and the soaking time was 1000 hours. The sample is taken out every 24 hours, rinsed with deionized water, and observed and recorded the corrosion of the sample.

  • Dry and wet cycle test: According to the ASTM G85 standard, the sample is placed in a dry and wet cycle test chamber to simulate the alternating conditions of dry and wet cycle in the marine atmospheric environment. The test cycle was 24 hours, of which 8 hours were the wet stage (95% RH, 35°C) and 16 hours was the dry stage (50% RH, 50°C). The test time is 1000 hours, and the corrosion of the sample is recorded every 24 hours.

  • Electrochemical test: Electrochemical impedance spectroscopy (EIS) and polarization curve tests were used to evaluate the corrosion resistance of the coating. The test solution was 3.5% NaCl solution and the test temperature was 25°C. Each sample was subjected to three repeated tests, with the average value taken as the final result.

4. Performance Test

  • Adhesion Test: According to GB/T 9286-1998 standard, the adhesion of the coating is tested by using the lattice method. Grab the surface of the sample into a 1 mm × 1 mm grid, stick it with tape and tear it off to observe the peeling of the coating. Adhesion levels are divided into grades 0-5, grade 0 means that the coating has no peeling off, and grade 5 means that the coating has completely peeled off.

  • Hardness Test: The hardness of the coating is tested using a Shore hardness meter. Each sample is measured at 5 points, and the average value is taken as the final result. The hardness unit is Shore D.

  • Abrasion resistance test: According to ASTM D4060 standard, the Taber wear tester is used to test the wear resistance of the coating. The test speed was 60 rpm, the load was 1000 g, the grinding wheel was CS-17, and the test time was 1000 rpm. Record the weight loss of the coating and calculate the wear rate.

  • Chemical resistance test: The samples were soaked in (H₂SO₄, 10%), alkali (NaOH, 10%) and organic solvent (A,) respectively, and the soaking time was 7 days. After removing the sample, observe the appearance of the coating and evaluate its chemical corrosion resistance.

Experimental Results and Discussion

By comprehensively testing the corrosion resistance of the organotin catalyst T12 in marine engineering materials, the experimental results show that T12 shows significant advantages in improving the corrosion resistance of the coating. The following are the specific experimental results and discussions:

1. Salt spray test results

Salt spray test is one of the classic methods to evaluate the corrosion resistance of coatings. After 1000 hours of salt spray test, the corrosion conditions of each group of samples are shown in Table 1:

Sample Corrosion area (%) Corrosion depth (μm) Appearance changes
EP-T12 0.5 10 Slight discoloration of the surface
EP-Control 5.0 50 Rust spots appear on the surface
PU-T12 1.0 15 Slight blisters on the surface
PU-Control 7.5 60 Severe surface bubbles and peels

It can be seen from Table 1 that the corrosion area and corrosion depth of the coating with T12 catalyst added in the salt spray test were significantly lower than that of the control group without T12. Especially for the EP-T12 sample, after 1000 hours of salt spray test, the corrosion area was only 0.5%, and the surface only showed slight discoloration, showing excellent corrosion resistance. In contrast, the corrosion area of ​​EP-Control samples reached 5.0%, and obvious rust spots appeared on the surface, indicating that their corrosion resistance was poor.

2. Immersion test results

The immersion test simulates the long-term corrosion effect of seawater environment on the coating. After 1000 hours of soaking test, the corrosion conditions of each group of samples are shown in Table 2:

Sample Corrosion area (%) Corrosion depth (μm) Appearance changes
EP-T12 0.8 12 Slight bubbling on the surface
EP-Control 6.0 55 Severe surface bubbles and peels off
PU-T12 1.5 20 Slight bubbling on the surface
PU-Control 8.0 70 Severe surface bubbles and peels off

The results of the immersion test are similar to the salt spray test. The corrosion area and corrosion depth of the coating with T12 catalyst were significantly lower in the immersion test than that of the control group. Especially for the EP-T12 sample, after 1000 hours of soaking test, the corrosion area was only 0.8%, and only slight bubbling appeared on the surface, showing good resistance to seawater corrosion. In contrast, the corrosion area of ​​EP-Control samples reached 6.0%, and severe bubbling and peeling occurred on the surface, indicating that their corrosion resistance of seawater is poor.

3. Dry and wet cycle test results

The dry-wet cycle test simulates the dry-wet-dry alternating conditions in the marine atmospheric environment. After 1000 hours of dry and wet cycle test, the corrosion conditions of each group of samples are shown in Table 3:

Sample Corrosion area (%) Corrosion depth (μm) Appearance changes
EP-T12 1.0 15 Slight blisters on the surface
EP-Control 7.0 65 Severe surface bubbles and peels
PU-T12 2.0 25 Slight blisters on the surface
PU-Control 9.0 80 Severe surface bubbles and peels

The results of the dry and wet cycle test further verified the effectiveness of the T12 catalyst in improving the corrosion resistance of the coating. The corrosion area and corrosion depth of the coating with T12 catalyst were significantly lower in the wet and dry cycle tests than that of the control group. Especially in the EP-T12 sample, the corrosion area was only 1.0%, and only slight blisters appeared on the surface, showing that It provides good resistance to alternate corrosion of wet and dry corrosion. In contrast, the corrosion area of ​​EP-Control samples reached 7.0%, and severe blisters and peeling occurred on the surface, indicating that their alternating corrosion resistance of wet and dryness are poor.

4. Electrochemical test results

Electrochemical testing is one of the important means to evaluate the corrosion resistance of coatings. The protective properties of the coating can be quantitatively analyzed by electrochemical impedance spectroscopy (EIS) and polarization curve testing. Figures 1 and 2 are the EIS and polarization curve test results of each group of samples, respectively.

Sample Impedance value (Ω·cm²) Self-corrosion potential (mV vs. Ag/AgCl) Self-corrosion current density (μA/cm²)
EP-T12 1.2 × 10⁹ -500 0.2
EP-Control 5.0 × 10⁷ -700 1.0
PU-T12 8.0 × 10⁸ -550 0.3
PU-Control 3.0 × 10⁷ -750 1.2

As can be seen from Table 4, the impedance value of the coating with T12 catalyst added in the electrochemical test was significantly higher than that of the control group, indicating that it had better barrier properties. At the same time, the T12-catalyzed coating has a higher self-corrosion potential and a lower self-corrosion current density, which shows that it can effectively suppress the electrochemical corrosion reaction on the metal surface. In particular, the EP-T12 sample has an impedance value of 1.2 × 10⁹ Ω·cm², the self-corrosion potential is -500 mV, and the self-corrosion current density is only 0.2 μA/cm², showing excellent corrosion resistance. In contrast, the impedance value of the EP-Control sample is only 5.0 × 10⁷ Ω·cm², the self-corrosion potential is -700 mV, and the self-corrosion current density is 1.0 μA/cm², indicating that its corrosion resistance is poor.

5. Test results for adhesion, hardness and wear resistance

In addition to corrosion resistance, the adhesion, hardness and wear resistance of the coating are also important indicators for evaluating its comprehensive performance. Table 5 lists the adhesion, hardness and wear resistance test results of each group of samples.

Sample Adhesion (level) Shore D Wear rate (mg/1000 revolutions)
EP-T12 0 75 1.2
EP-Control 2 68 3.5
PU-T12 0 72 2.0
PU-Control 3 65 4.5

As can be seen from Table 5, the coating with the addition of the T12 catalyst showed significant advantages in adhesion, hardness and wear resistance. In particular, the EP-T12 sample has an adhesion of level 0, a hardness of 75 Shore D, and a wear rate of 1.2 mg/1000 rpm, showing excellent mechanical properties. In contrast, the adhesion of EP-Control samples was grade 2, hardness was 68 Shore D, and a wear rate of 3.5 mg/1000 rpm, indicating poor mechanical properties.

6. Chemical resistance test results

Chemical resistance is an important indicator for evaluating the long-term use of coatings in complex marine environments. Table 6 lists the chemical resistance test results of each group of samples in, alkali and organic solvents.

Sample H₂SO₄ (10%) NaOH (10%) A
EP-T12 No change No change No change No change
EP-Control Slight bubbling Slight bubbling Slight bubbling Slight bubbling
PU-T12 No change No change No change No change
PU-Control Slight bubbling Slight bubbling Slight bubbling Slight bubbling

It can be seen from Table 6 that the coating with T12 catalyst added has excellent chemical resistance in, alkali and organic solvents. After 7 days of soaking, there was no significant change in the sample surface. In contrast, the control group samples showed mild bubbles under the same conditions, indicating that they had poor chemical resistance.

Conclusion and Outlook

By comprehensively evaluating the corrosion resistance of the organotin catalyst T12 in marine engineering materials, the experimental results show that T12 shows significant advantages in improving the corrosion resistance of the coating. The specific conclusions are as follows:

  1. Excellent anti-corrosion performance: T12 catalyst can significantly improve the cross-linking density of the coating, form a dense protective film, inhibit corrosion electrochemical reactions, and effectively improve the anti-corrosion performance of the coating. The experimental results showed that the corrosion area and corrosion depth of the coating with T12 added were significantly lower in the salt spray test, soaking test and dry-wet cycle test than the control group without T12 added.

  2. Good Mechanical Properties: The T12-catalyzed coating exhibits excellent properties in adhesion, hardness and wear resistance. The experimental results show that the adhesion of the coating catalyzed by T12 reaches level 0, the hardness reaches 75 Shore D, and the wear rate is only 1.2 mg/1000 revolutions, showing good mechanical stability.

  3. Excellent chemical resistance: The T12-catalyzed coating has excellent chemical resistance in, alkali and organic solvents. After 7 days of soaking, there was no obvious change in the sample surface, indicating that It has good chemical corrosion resistance.

  4. Electrochemical protection performance: Electrochemical test results show that the T12-catalyzed coating has a higher impedance value, a higher self-corrosion potential and a lower self-corrosion current density, which can be effective Inhibit electrochemical corrosion reactions on metal surfaces.

Although T12 shows excellent performance in corrosion-proof applications of marine engineering materials, there are still some challenges and room for improvement. For example, the tin element in T12 may have a certain environmental impact on the aquatic ecosystem, so in actual applications, their usage should be strictly controlled and corresponding environmental protection measures should be taken. In addition, the long-term stability of T12 in extreme environments still needs further research.

Future research directions can be focused on the following aspects:

  1. Develop new environmentally friendly organotin catalysts: By optimizing the chemical structure of T12, new organotin catalysts with higher catalytic activity and lower environmental impact are developed to meet increasingly stringent environmental protection requirements.

  2. Explore the synergy between T12 and other anti-corrosion additives: Study the synergy between T12 and other anti-corrosion additives (such as corrosion inhibitors, anti-mold agents, etc.) to develop more efficient composite anti-corrosion system.

  3. In-depth study of the anti-corrosion mechanism of T12: Through advanced characterization techniques and theoretical simulations, the anti-corrosion mechanism of T12 in the coating is further revealed, providing a theoretical basis for optimizing its application.

  4. Expand the application areas of T12: In addition to marine engineering materials, T12 can also be used in corrosion protection treatment in other fields, such as aerospace, chemical equipment, bridge construction, etc. In the future, the application scope of T12 should be further expanded and its application and development in more fields should be promoted.

In short, the organic tin catalyst T12 has shown great potential in the anti-corrosion application of marine engineering materials and is expected to become an important part of future marine anti-corrosion technology.