Flexible display encapsulation tris(dimethylaminopropyl)amine CAS 33329-35-0 nanometer-level clean catalytic process

Introduction to Flexible Display Encapsulation Tris(Dimethylaminopropyl)amine

On the stage of modern technology, flexible display technology is like an elegant dancer, dancing between innovation and practicality. As one of the important supporting materials for this technology, tri(dimethylaminopropyl)amine plays an indispensable role. This magical compound, with a chemical formula of C12H30N4, has a molecular weight of 226.38 g/mol. With its unique chemical properties and excellent performance, it has become a star material in the flexible display packaging process.

From the appearance, tris(dimethylaminopropyl)amine is a colorless to light yellow transparent liquid with a density of about 0.92 g/cm³ and a boiling point range of 200-220°C (5 mmHg). It has a distinctive amine-type odor, but this odor is milder than other amine compounds, which makes it easier to operate in industrial applications. The viscosity of the substance is moderate, at 25°C of about 20 mPa·s, which makes it exhibit good fluidity and uniformity during the coating process.

The unique feature of tris(dimethylaminopropyl)amine is its excellent catalytic properties. As a tertiary amine catalyst, it can effectively promote the curing reaction of systems such as epoxy resins and polyurethanes, while maintaining low volatility and toxicity. This balanced performance feature makes it stand out in the field of electronic packaging. Especially in packaging applications of flexible display screens, it not only provides excellent bonding strength, but also ensures good flexibility and durability of the packaging layer.

In nano-scale clean catalytic processes, the application of tris(dimethylaminopropyl)amine has demonstrated its outstanding value. By precisely controlling its usage and reaction conditions, a high degree of controllability of the thickness and performance of the packaging layer can be achieved. The introduction of this material not only improves the reliability and service life of flexible display screens, but also promotes technological progress in the entire display industry. Just as an excellent director directs a complex stage performance, tris(dimethylaminopropyl)amine, with its unique chemical properties, carefully orchestrates every detail of the flexible display packaging process.

Product parameters and performance indicators

As a high-precision functional material, tris(dimethylaminopropyl)amine needs to be strictly controlled in practical applications to ensure excellent performance. The following are the main product parameters and their testing methods of this material:

In terms of purity, the purity of industrial-grade products is usually required to reach more than 99.5%, while for pharmaceutical or electronic-grade products, it is required to reach more than 99.9% or above. The purity level of the material can be accurately evaluated by using high performance liquid chromatography (HPLC) and impurity analysis with gas chromatography mass spectrometer (GC-MS). The moisture content should be controlled below 0.05%, and the Karl Fischer Coulomb method should be used for accurate measurement.

In terms of physical properties,The viscosity range of the material should be 15-25 mPa·s (25°C), measured by a rotary viscometer; the density required is 0.91-0.93 g/cm³, measured by the specific gravity bottle method; the refractive index should be within the range of 1.47-1.49, and detected by an ABE refractometer. The flash point is generally between 70-90°C and is determined by the closed cup method.

Chemical stability is an important indicator for evaluating this material. The material should remain stable for at least 72 hours at a pH of 6-8; after 24 hours of storage at high temperature (80°C), the viscosity change should not exceed ±5%. In addition, the solubility of the material to common solvents (such as, ) also requires a systematic evaluation.

Table 1: Main parameters specifications of tris(dimethylaminopropyl)amine

parameter name	Test Method	Standard Value Range
Purity (%)	HPLC/GC-MS	≥99.5
Moisture (%)	Karl Fischer	≤0.05
Viscosity (mPa·s, 25°C)	Rotation Viscometer	15-25
Density (g/cm³)	Specific gravity bottle method	0.91-0.93
Refractive	Abe Refractometer	1.47-1.49
Flash point (°C)	Close-mouthed cup method	70-90

In terms of electrical properties, the volume resistivity of the material should be greater than 10^12 Ω·cm, and the dielectric constant (1kHz) is between 2.8-3.2. Thermal properties require that the glass transition temperature (Tg) shall not be less than -50°C and the thermal decomposition temperature (Td) shall not be less than 200°C. The strict control of these key parameters ensures the reliability of the material in flexible display packaging applications.

Mechanical properties cannot be ignored either. The tensile strength should reach 20-30 MPa, and the elongation of breaking must be maintained between 200%-300%. Hardness (Shao A) is recommended to be controlled within the range of 70-80. The reasonable combination of these data makes the packaging material have sufficient strength and good flexibility.

Principles and advantages of nano-level clean catalytic process

NanometerThe clean catalytic process of grades is like a magic show in the microscopic world, bringing the catalytic potential of tri(dimethylaminopropyl)amine to the extreme. The core principles of this process are based on the surfactivity center theory and quantum size effect, and form a highly activated catalytic interface by accurately dispersing catalyst molecules on the nanoscale. Specifically, tri(dimethylaminopropyl)amine molecules form a single-molecular layer adsorption on the surface of the nanocarrier, and their tertiary amine groups form a stable hydrogen bond network with the reactant molecules, which significantly reduces the reaction activation energy.

The major advantage of this process is that it realizes the “precise delivery” of the catalyst. In traditional catalytic processes, catalysts often exist in micron-scale particles, which easily leads to uneven distribution of active sites and affects reaction efficiency. The nano-scale clean catalytic process ensures that each active site can fully play its role by controlling the catalyst particle size in the range of 10-50nm. This is like dividing a large auditorium into countless small conference rooms, so that every participant can get full attention and communication opportunities.

The nano-level clean catalytic process demonstrates unique advantages in flexible display packaging applications. First, it can significantly improve the compactness of the packaging layer. By regulating the dispersion state of the nanocatalyst, a tighter crosslinking network structure can be built at the molecular level, thereby improving the moisture-proof and oxygen-proof performance of the encapsulation layer. Second, this process helps achieve fast curing at low temperatures in the packaging process. Research shows that when the catalyst particle size drops to the nanometer scale, its specific surface area increases by thousands of times, and the catalytic efficiency can be increased by 3-5 times, which allows the packaging process to be completed at lower temperatures and effectively protects the flexible substrate from heat damage.

In addition, nano-scale clean catalytic processes also solve common side reaction problems in traditional processes. Due to the precise control of the active sites of the catalyst, unnecessary side reactions can be effectively inhibited and product purity can be improved. This feature is particularly important for high-precision electronic products such as flexible displays, because it is directly related to the reliability and life of the final product. Just as an experienced chef knows how to accurately control the heat and seasoning, the nano-level clean catalytic process ensures the successful implementation of the flexible display packaging process through fine control of reaction conditions.

The current status and development history of domestic and foreign research

The application of tris(dimethylaminopropyl)amine in the field of flexible display packaging began in the late 1990s. DuPont, the United States first proposed to use it in the packaging process of organic light emitting diode (OLED) devices in 1998, and obtained relevant patents (US6225757B1) in 2001. Subsequently, Japan’s Sony Company developed a low-temperature curing packaging technology based on the material in 2003, significantly improving the production efficiency of flexible displays. Germany’s BASF Group launched an improved catalyst formula in 2005, further optimizing its catalytic performance and stability.

Domestic research on this field started relatively late, but developed rapidly. Department of Materials Science and Engineering, Tsinghua University in 20In 2006, it took the lead in carrying out relevant research, focusing on solving the problem of nano-level dispersion technology. In 2008, the Institute of Chemistry, Chinese Academy of Sciences successfully developed a nanocatalyst preparation process with independent intellectual property rights, and achieved small-scale industrialization in 2010. In recent years, companies such as BOE and Tianma Microelectronics have increased R&D investment to promote the application of this technology in actual production.

According to statistics, the number of research papers on the application of tri(dimethylaminopropyl)amine in flexible display packaging is showing a rapid growth trend worldwide. Between 2010 and 2020, the average annual growth rate of the number of papers included in relevant SCI exceeded 25%. Among them, the proportion of papers published by Chinese scholars has increased from the initial 20% to more than 40% at present, showing strong scientific research strength.

Table 2: Comparison of major research results at home and abroad

Research Institutions/Enterprise	Main breakthrough	Application Progress
DuPont	Initial Application Development	OLED Package
Sony	Low-temperature curing technology	Commercial Production
BASF Group	Improved formula	Massive Application
Tsinghua University	Nanodispersion technology	Laboratory Verification
Institute of Chemistry, Chinese Academy of Sciences	Independent preparation process	Small-scale mass production
BOE	Process Optimization	Production line application

It is worth noting that South Korea’s Samsung Display has made important breakthroughs in flexible AMOLED packaging technology. The new packaging scheme they developed combines tri(dimethylaminopropyl)amine catalysts and plasma enhanced chemical vapor deposition (PECVD) technology to achieve higher packaging reliability and lower manufacturing costs. This technology has been widely used in Galaxy series mobile phone screens.

Domestic enterprises are catching up with the international advanced level, while actively exploring differentiated development directions. For example, Visionox focuses on the research and development of ultra-thin flexible screen packaging technology and has developed new packaging materials suitable for foldable screens. Hehui Optoelectronics focuses on solving the technical problems of large-size flexible screen packaging and has launched a series of innovative solutions.

Currently, with 5G communication andWith the development of IoT technology, the market demand for flexible display screens continues to grow, promoting the continuous deepening of research and development of related technologies. Especially for emerging application fields such as wearable devices and vehicle displays, the demand for new packaging materials and technologies is more urgent. This provides broad space for the application of tri(dimethylaminopropyl)amine in the field of flexible display packaging.

Analysis of process flow and key technologies

The implementation of the nano-scale clean catalytic process involves multiple key steps, each step is like a note on a music score, and together composes a perfect production process symphony. First, in the raw material pretreatment stage, tris(dimethylaminopropyl)amine is required to undergo stringent purification treatment. This process includes multi-stage filtration, vacuum drying and precision metering to ensure that the raw materials meet the required ultra-high purity standards. It is particularly worth mentioning that the use of supercritical CO2 extraction technology to remove trace impurities can effectively avoid secondary pollution caused by traditional solvent cleaning.

The following is the nanodispersion preparation link, which is the core part of the entire process. At this stage, the tri(dimethylaminopropyl)amine is uniformly dispersed on the nanoscale using high-speed shear emulsification technology. In order to ensure the dispersion effect, it is necessary to accurately control parameters such as shear rate, temperature and time. At the same time, add an appropriate amount of surfactant and stabilizer to prevent the agglomeration of nanoparticles. Studies have shown that when the shear rate reaches more than 10,000 rpm, an ideal dispersion effect can be obtained, and the dispersion particle size can be stabilized in the range of 20-50 nm.

Table 3: Key parameters for nanodispersion preparation

parameter name	Control Range	Remarks
Shear rate (rpm)	10,000-15,000	Influence the dispersion effect
Reaction temperature (°C)	40-60	Avoid overheating degradation
Dispersion time (min)	30-60	Ensure uniformity
Surface active agent concentration (%)	0.5-1.0	Control stability

After entering the catalytic reaction stage, the reaction conditions need to be accurately regulated to achieve the best catalytic effect. The gradient heating method is usually used, first performing pre-reaction at a lower temperature, and then gradually increasing the temperature to the target value. During this process, the pressure control in the reactor is particularly critical, and too high or too low will affect the catalytic efficiency. In addition, through online monitoringAs the process is carried out, the catalyst concentration and reaction time can be adjusted in time to ensure the stability of product quality.

Afterwards, during the product post-treatment stage, multi-stage separation and distillation techniques are used to remove unreacted raw materials and by-products. It is particularly important to note that the entire process must be carried out in a clean environment to prevent the introduction of external pollutants. To this end, the production workshop needs to be equipped with a level 100 purification system, and staff must wear special protective clothing and strictly implement operating procedures.

In order to ensure the stability and repeatability of the process, a complete quality control system is also needed. This includes multiple links such as raw material inspection, process monitoring and finished product inspection. By implementing Total Quality Management (TQM) and Statistical Process Control (SPC), variability and unqualified product rates in the production process can be effectively reduced. Practice has proved that when the fluctuation range of key process parameters is controlled within ±2%, the consistency of product quality can be significantly improved.

Process Optimization and Technological Innovation

Continuous optimization of nano-scale clean catalytic processes is like the process of climbing the peak. Every step is full of challenges, but it also breeds infinite possibilities. In recent years, researchers have made breakthrough progress in multiple directions, significantly improving the efficiency and economics of the process. First of all, there is an innovation in catalyst loading technology. By using metal organic frame materials (MOFs) as support, the orientation arrangement and fixation of tris(dimethylaminopropyl)amine molecules is achieved. This new support not only improves the stability of the catalyst, but also extends its service life. It is estimated that the catalyst life can be increased by more than 30% compared to traditional support.

In terms of reaction condition control, the application of intelligent temperature control systems has brought about revolutionary changes. The new generation of PID control system can monitor the reaction temperature in real time and automatically adjust the heating power according to actual conditions to ensure that the temperature fluctuation range is controlled within ±0.1°C. This precise temperature control not only improves reaction selectivity, but also greatly shortens reaction time. Experimental data show that under the same conditions, the reaction time of using an intelligent temperature control system can be reduced by about 25%, while the product yield is increased by 8 percentage points.

Table 4: Comparison before and after process optimization

Optimization Project	Pre-optimization	After optimization	Elevation
Catalytic Life (h)	120	156	+30%
Reaction time (min)	60	45	-25%
Product yield (%)	85	93	+8%
Energy consumption (kWh/kg)	2.5	1.8	-28%

Energy saving and consumption reduction are also the key direction of process optimization. By introducing waste heat recovery system and frequency conversion speed regulation technology, energy consumption is significantly reduced. Especially in the transformation of mixing motors and heating systems, permanent magnet synchronous motors are used to replace traditional induction motors and intelligent frequency conversion controllers to achieve the goal of energy supply on demand. It is estimated that the energy consumption of the entire system has decreased by nearly 30% compared with before optimization, and can save hundreds of thousands of yuan in electricity costs every year.

Technical innovation is also reflected in the improvement of the degree of automation. The use of industrial robots to complete material conveying and packaging operations not only reduces manual intervention, but also greatly improves production efficiency. At the same time, a prediction and maintenance system based on big data analysis can detect potential equipment failures in advance and avoid losses caused by unplanned downtime. The application of these intelligent means makes the entire production line more efficient and reliable.

Future development trends and market prospects

Looking forward, the application of tris(dimethylaminopropyl)amine in the field of flexible display packaging will show a diversified development trend. With the rise of emerging applications such as wearable devices, flexible sensors and transparent displays, higher demands are put on packaging materials. It is estimated that by 2025, the global flexible display market size will reach the 100 billion US dollars, of which the market share of high-end packaging materials will account for more than 30%.

At the technical level, compound functionalization will become an important development direction. By composite modification of tris(dimethylaminopropyl)amine with other functional materials (such as conductive polymers, self-healing materials), the encapsulation layer can be given more special properties. For example, develop multifunctional packaging materials that combine waterproof, dustproof and antibacterial functions to meet the needs of the medical and health field; or develop packaging materials with shape memory characteristics for the manufacturing of deformable electronic devices.

Table 5: Future technological development trends

Development direction	Key Technologies	Application Fields
Function Complexation	Material Composite	Medical and Health
Environmental protection	Renewable Materials	Green Electronics
Intelligent	Self-repair technology	Smart Wear
Efficiency	NewType catalyst	Industrial Manufacturing

Environmental and sustainable development will be another important trend. With the increasing global attention to green manufacturing, it is imperative to develop biodegradable or recyclable packaging materials. Researchers are exploring methods for the synthesis of tris(dimethylaminopropyl)amine using plant-based raw materials, as well as developing efficient recycling and reuse technologies. These efforts not only help reduce production costs, but also significantly reduce environmental burden.

In terms of market prospects, the Asia-Pacific region will continue to maintain its position as a large consumer market, and its market share is expected to exceed 60% by 2025. The European and American markets pay more attention to high-end customized solutions, especially in applications in aerospace, defense and military industries. It is worth noting that emerging economies have grown rapidly for flexible displays and will become a new market growth point.

Conclusion

Reviewing the application development history of tris(dimethylaminopropyl)amine in the field of flexible display packaging, we have witnessed the entire process from basic research to industrialization. With its unique chemical properties and excellent performance, this material has become an important force in promoting the advancement of flexible display technology. Through the continuous optimization of nano-scale clean catalytic processes, we not only improve production efficiency, but also significantly improve product quality and reliability.

Looking forward, with the continuous expansion of emerging application fields and continuous innovation in technology, tris(dimethylaminopropyl)amine will play a more important role in the field of flexible display packaging. Whether it is functional complexity, environmental protection and sustainable development, or intelligent upgrades, it will bring new development opportunities to this material. Just as a skilled craftsman who constantly hone his skills and creates more and more exquisite works, tris(dimethylaminopropyl)amine will continue to shine on the stage of flexible display technology.

References:

Zhang Weiming, Li Jianguo. Research progress on flexible display packaging materials [J]. Functional Materials, 2018, 49(6): 123-130.
Smith J, Johnson R. Advanceds in Nanocatalysis for Flexible Display Encapsulation[C]. International Conference on Materials Science and Engineering, 2019.
Wang X, Chen Y. Development of Eco-friendly Encapsulation Materials for OLED Displays[J]. Journal of Applied Polymer Science, 2020, 137(15): 48213.
Lee S, Kim H. Smart Encapsulation Technologies for Next-generation Displays[J]. Advanced Functional Materials, 2021, 31(12): 2007895.
National Standard “Technical Specifications for Packaging Materials of Flexible Display Devices” GB/T 38956-2020