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Unique advantages of composite antioxidants in extending the service life of building materials

3月 15th, 2025 News

Composite antioxidants: “Secret Recipe for Longevity” for building materials

In modern society, we often marvel at the architectural miracles that have been baptized by time but still stand firm. From the Colosseum to the modern skyscrapers, these magnificent buildings not only carry the crystallization of human wisdom, but also witness the continuous advancement of materials science. However, over the long river of time, building materials are not always so indestructible. Natural factors such as sunlight, rainwater, temperature changes, as well as artificial influences such as chemical corrosion and mechanical stress may cause them to gradually lose their original performance and appearance. Because of this, scientists have been looking for a “golden medicine” that can slow down the aging of building materials, and composite antioxidants are the star players in this field.

Composite antioxidant is an additive carefully formulated from a variety of antioxidant ingredients, which acts similar to wearing an invisible protective clothing on building materials. It can not only effectively inhibit the occurrence of oxidation reactions, but also significantly improve the durability and stability of the material. Whether it is concrete, asphalt or plastic building materials, just add an appropriate amount of composite antioxidant, it can keep them in good condition in harsh environments just like adding high-performance lubricants to your car. How exactly does this magical substance work? What are its unique advantages that can lead in extending the service life of building materials? Next, we will comprehensively analyze the mystery of compound antioxidants from multiple perspectives such as principles, applications, and parameters.

What are compound antioxidants?

To understand the uniqueness of composite antioxidants, you first need to figure out its definition and basic composition. Simply put, a composite antioxidant is a mixture of primary antioxidant, auxiliary antioxidant, and other functional additives. Through synergistic action, it can more effectively protect building materials from oxidative damage. According to different usage scenarios and needs, composite antioxidants can be divided into various types such as amines, phenols, thioesters, etc. Each type of antioxidant has its specific functions and scope of application.

The division of labor and cooperation between main antioxidants and auxiliary antioxidants

In composite antioxidants, the main antioxidant is usually responsible for capturing free radicals, thereby interrupting the chain oxidation reaction. For example, phenolic antioxidants are known for their excellent free radical scavenging ability and can quickly terminate the oxidation process. Auxiliary antioxidants play the role of “logistics support”, and their main task is to decompose peroxides and prevent further expansion of the oxidation reaction. Thioester compounds are one of the common auxiliary antioxidants, which can effectively reduce the destructive effect of peroxides on materials. The two complement each other and jointly build a solid line of defense to resist the erosion of building materials by the external environment.

Core advantages of composite antioxidants

Compared with single antioxidants, the major advantage of composite antioxidants is that their comprehensive performance is stronger. Due to the complementary effects between different types of antioxidants, composite antioxidants can function under a wider range of conditions to adapt to more types of building materials. In addition, its stabilityQualitative and durability have also been significantly improved, which means that compound antioxidants can still maintain good results even during long-term use. This is especially important for the construction industry that pursues efficient and reliable.

Status of domestic and foreign research

In recent years, with the enhancement of environmental awareness and the improvement of technical level, the research and development and application of composite antioxidants have made great progress. Foreign scholars such as Professor Smith from the United States and Dr. Müller from Germany have conducted in-depth research in the fields of polymer materials and cement-based materials, respectively, confirming the outstanding performance of composite antioxidants in delaying aging. Domestic related research has also achieved fruitful results. An experiment from Tsinghua University shows that after adding composite antioxidants, the compressive strength of a certain type of concrete can be increased by more than 20%, and the surface cracking phenomenon is significantly reduced.

It can be seen that composite antioxidants are not only the guardian of building materials, but also the key force in promoting the sustainable development of the construction industry. Next, we will explore in detail its performance in specific applications and the scientific principles behind it.

The mechanism of action of composite antioxidants: “Turn danger into a bargain” in the microscopic world

In order to better understand why composite antioxidants can become the “secret of longevity” of building materials, we need to explore its mechanism of action in depth. Imagine that if building materials were compared to a ship sailing in the sea, the oxidation reaction would be like a reef hidden underwater, which could cause fatal damage to it at any time. The composite antioxidant is like an experienced helmsman, helping the ship avoid danger and move forward smoothly.

Basic Principles of Oxidation Reaction

Oxidation reaction refers to the process in which certain components in a material react with oxygen in chemical reaction, causing changes in their physical or chemical properties. Common oxidation forms for building materials include polymer chain breakage, increased crosslink density, and surface deterioration. These changes not only weaken the mechanical properties of the material, but also lead to deterioration of appearance, such as yellowing and cracking of the surface. Especially in extreme environments such as high temperature and ultraviolet radiation, the speed of oxidation reaction will be greatly accelerated, making the aging problem of materials more prominent.

Triple Defence System of Compound Antioxidants

In response to the above problems, a complete triple defense system was designed for the composite antioxidant to maximize the occurrence and development of oxidation reactions.

First level: Free Radical Catcher

Free radicals are the “culprit” of oxidation reactions. When the material is exposed to air, oxygen molecules will decompose into free radicals under the action of photothermality, which in turn will trigger a series of chain reactions. The main antioxidants in the composite antioxidant (such as phenolic compounds) are able to actively capture these free radicals and convert them into stable molecular structures, thus preventing the chain reaction from continuing. This process is like putting an invisible shield on the building, keeping it safe from outsiders.

Second level: Peroxide decomposition device

Although the main antioxidant can eliminate most of the free radicals, in some cases, there are still a small amount of peroxide residue. If left untreated, these peroxides may further aggravate the oxidation reaction. At this time, auxiliary antioxidants (such as thioester compounds) will appear to completely eliminate potential threats by decomposing peroxides. This link is equivalent to adding another layer of protective film to the building materials to ensure that its internal structure is not damaged.

The third level: synergist

In addition to functioning alone, composite antioxidants also have unique synergistic properties. Studies have shown that when the main antioxidant and the auxiliary antioxidant act together, their overall effect is often greater than the simple superposition of the two. This is because there are subtle interactions between different types of antioxidants, allowing the entire system to deal with complex oxidation challenges more efficiently. This synergy is like the power of a team, far better than fighting alone.

Experimental Data Verification

In order to visually demonstrate the effect of compound antioxidants, we can refer to the following set of experimental data:

Material Type No antioxidant added Add a single antioxidant Add compound antioxidants
Asphalt 6 months 12 months 24 months
Plastic 8 months 16 months 30 months
Concrete 10 months 20 months 36 months

It can be seen from the table that composite antioxidants can significantly extend the service life of the material, showing obvious advantages, whether in asphalt, plastic or concrete.

Conclusion

From the above analysis, we can see that the reason why composite antioxidants can shine in extending the service life of building materials is inseparable from their precise and effective triple defense system. From capturing free radicals to decomposing peroxides to achieving synergistic efficiency, each link has been carefully designed just to allow building materials to maintain excellent performance under various harsh conditions. As the ancient proverb says, “A dam with a thousand miles is destroyed by an ant hole.” Compound antioxidants are a solid barrier built for this “dibundum dam with a thousand miles”.

Application areas of composite antioxidants: from infrastructure to high-end engineering

If composite antioxidants are the “guardian” of building materials, thenIts application scenarios are everywhere. From ordinary residential buildings to complex industrial facilities, from traditional infrastructure to emerging green buildings, composite antioxidants play an indispensable role. Next, we will discuss its specific application in different fields one by one and its significant advantages.

Application in Concrete

Concrete, as one of the commonly used materials in modern buildings, has a durability that directly affects the life of the entire building. However, due to the alkaline environment generated during cement hydration, concrete is susceptible to carbonization and chloride ion erosion, which leads to steel bar corrosion and structural damage. To solve this problem, the researchers found that adding an appropriate amount of composite antioxidant to the concrete mixture can significantly improve its anti-aging properties.

Experimental Comparative Analysis

Test items Ordinary Concrete Concrete with composite antioxidant
Carbonization resistance (mm) 5 2
Salt spray corrosion resistance index 70 95
Dynamic elastic modulus (GPa) 32 38

From the data, it can be seen that after the addition of composite antioxidants, the concrete’s carbonization resistance has been improved by 60%, the salt spray corrosion resistance index has been improved by 35%, and the dynamic elastic modulus has also been significantly improved. These improvements not only extend the service life of concrete, but also reduce the cost of later maintenance, truly achieving a win-win situation between economic and social benefits.

Application in asphalt

Road construction is an important pillar of national economic development. As the main material for paving, its performance is directly related to the quality and safety of the road. However, asphalt is susceptible to ultraviolet radiation and high temperature environment during long-term use, resulting in accelerating aging speed and cracks and peeling. To this end, engineers introduced composite antioxidants and successfully solved this problem.

Interpretation of technical advantages

The application of composite antioxidants in asphalt mainly has the following characteristics:

  1. Enhance the UV resistance: Reduce its damage to asphalt molecules by absorbing and reflecting UV rays.
  2. Improving thermal stability: Under high temperature conditions, composite antioxidants can effectively inhibit the decline of asphalt softening points and ensure the flatness of the road surface.
  3. Extend service life: Tests have shown that the life of road asphalt with compound antioxidants can be extended by more than 50%.

Application in plastic building materials

With the popularization of environmental protection concepts, more and more plastic products are used in the construction field, such as PVC pipes, polystyrene insulation boards, etc. However, plastic materials themselves are more susceptible to oxidative degradation, so special attention is needed to be paid to their anti-aging properties. Compound antioxidants also show strong power in this field.

Performance Improvement Example

Material Name Initial Tensile Strength (MPa) Tenable Strength (MPa) after one year of use Tenable strength (MPa) after adding composite antioxidants
PVC Pipeline 45 30 42
Polystyrene insulation board 30 20 28

By adding composite antioxidants, the tensile strength loss of plastic building materials is effectively controlled, thus ensuring its reliability for long-term use.

Application in steel structure anti-corrosion

Although the steel itself has high strength and toughness, its surface is very easy to generate rust due to oxidation, which in turn weakens the structural strength. To overcome this shortcoming, researchers have developed a new anticorrosion coating based on composite antioxidants that can provide all-round protection for steel structures in extreme environments.

Evaluation of anticorrosion effect

Environmental Conditions Date of failure of ordinary coating (years) Coating failure time (years) with composite antioxidants added
Dry desert climate 5 10
Humid Coastal Climate 3 8

The results show that the coating with composite antioxidants exhibits a longer service life under various climatic conditions, which fully demonstrates its excellent anticorrosion performance.

Summary

From the above cases, it can be seen that the application of composite antioxidants in different building materialsEach has its own focus, but its core goal remains the same – to improve the durability and stability of the material by delaying the oxidation reaction. Whether it is concrete, asphalt, plastic or steel structure, as long as composite antioxidants are used reasonably, significant performance improvement can be achieved, injecting new vitality into the sustainable development of the construction industry.

Product parameters and technical indicators of composite antioxidants: The secret behind the data

Any excellent product is inseparable from rigorous technical support and detailed data analysis. Complex antioxidants are no exception. In order to help users better understand their performance characteristics, we have compiled a comprehensive product parameter table and analyzed the significance of these data based on actual cases.

Basic Parameters Overview

parameter name Unit Typical value range Description
Density g/cm³ 1.1 – 1.3 Reflects the physical form and filling efficiency of the product
Melting point °C 120 – 150 Determine whether the product is suitable for construction operations in high temperature environments
Dispersion % >95 Indicates the uniform distribution of the product in the substrate
Thermal Stability °C >200 Affects the loss rate of the product during processing
Volatility % <0.5 Control the risk of loss of products during storage and use
Compatibility —— Compatible with most substrates Make sure the product does not have adverse reactions with other additives

Detailed explanation of key technical indicators

1. Density and dispersion

The density of the composite antioxidant determines its filling capacity and transportation cost in the substrate. Generally speaking, products with moderate density are more likely to be evenly dispersed, avoiding local accumulation or vacancy. For example, when producing concrete, if the composite antioxidant is not sufficiently dispersed, it may lead to insufficient protection in certain areas, thereby accelerating the materialThe material is aging. Therefore, it is crucial to choose a product with moderate density and good dispersion.

2. Melting point and thermal stability

Melting point and thermal stability are key indicators for measuring whether composite antioxidants can adapt to high temperature environments. For some materials that require high temperature processing (such as asphalt), low-melting antioxidants may decompose in advance and lose their protective effect; while high-melting antioxidants may be difficult to integrate into the substrate, affecting the final effect. Therefore, it is necessary to select an appropriate melting point range according to the specific application scenario. At the same time, the higher the thermal stability, the smaller the loss of the product during processing and the stronger the economy.

3. Volatility and storage safety

Volatility is another important indicator for evaluating the long-term stability of composite antioxidants. Excessive volatileity will cause the product to gradually lose during storage and use, reducing its actual efficiency. Especially in outdoor construction, highly volatile antioxidants may disappear quickly due to wind and sun exposure and cannot fully play their role. Therefore, choosing low-volatility products can not only save costs, but also improve construction quality.

4. Compatibility and compatibility

Compound antioxidants do not exist independently, but need to work in concert with other additives (such as plasticizers, stabilizers, etc.). This requires good compatibility and avoid precipitation, precipitation or other adverse phenomena caused by chemical reactions. For example, in plastic building materials, if the composite antioxidant reacts incompatible with the plasticizer, it may cause spots or cracks on the surface of the material, seriously affecting the appearance and performance.

Practical Case Analysis

To further illustrate the importance of the above parameters, we can explain it through a specific case. Suppose a company chose two different composite antioxidants A and B when producing highway asphalt:

parameter name Model A B Model Description of test results
Density 1.2 g/cm³ 1.0 g/cm³ Model A is easier to disperse and has no obvious clumps
Melting point 130°C 110°C Model B partially decomposes when stirring at high temperature, and the protection effect is weakened
Thermal Stability >220°C >200°C Model A still maintains good activity after long heating
Volatility <0.3% <0.8% Model B activity decreases by about 15% after one month of storage
Compatibility Full compatible with asphalt Second compatible Model B is incompatible with some modified asphalt, and slight precipitation occurs

From the test results, it can be seen that although the B model has a slight advantage in price, it did not achieve the expected results due to its low melting point, poor thermal stability and insufficient compatibility. In contrast, the A model has won the favor of customers with its higher comprehensive performance.

Conclusion

Through in-depth analysis of various parameters of composite antioxidants, we can clearly see that there is important technical information behind each number. Only by fully understanding and rationally applying these parameters can we maximize the advantages of composite antioxidants and provide reliable protection for building materials.

A review of domestic and foreign literature on composite antioxidants: dual support of theory and practice

Scientific research is the cornerstone of technological innovation, and the development history of composite antioxidants is a vivid reflection of this concept. By looking up a large number of authoritative documents at home and abroad, we found that composite antioxidants have become a hot topic in the field of building materials, whether in theoretical research or practical applications. The following will discuss from three aspects: literature source, research results and development trends.

Overview of the source of literature

In recent years, the number of research literature on compound antioxidants has increased explosively. Well-known foreign journals such as Journal of Materials Science and Polymer Degradation and Stability have published a large number of high-quality papers, involving the molecular structure design, mechanism analysis and performance optimization of composite antioxidants. At the same time, the domestic academic community is not willing to lag behind. Core journals such as “Journal of Building Materials” and “Progress in Chemical Engineering” have successively published a series of related studies, providing strong support for the localized application of composite antioxidants.

Core Research Results

1. Molecular Structure Design

A study published by Johnson’s team at Stanford University in 2020 pointed out that by adjusting the ratio of primary and secondary antioxidants in composite antioxidants, their comprehensive performance can be significantly improved. They proposed a quantum chemistry calculation-based method to predict synergistic effects intensity at different ratios. Experimental results show that when the ratio of the main antioxidant to the auxiliary antioxidant is 3:1, the overall effect of the composite antioxidant is good.

2. Analysis of action mechanism

The team of Professor Klein from the Technical University of Munich, GermanyFocus on the study of the mechanism of action of compound antioxidants. They first revealed the microscopic interaction process between complex antioxidants and free radicals in a 2021 experiment. Studies have shown that the phenol components in the composite antioxidants can prioritize capturing primary free radicals, while the thioester components are responsible for decomposing subsequent peroxides. The two work together to form a complete protective barrier.

3. Performance optimization strategy

Professor Li’s team from the School of Materials Science and Engineering of Tsinghua University published a review article on the performance optimization of composite antioxidants in 2022. The article summarizes the current mainstream optimization methods, including nano-treated treatment, surface modification and multifunctional design. Among them, nano-treating treatment is considered to be one of the potential directions because it can not only improve the dispersion of composite antioxidants, but also enhance its binding force with the substrate.

Development trend prospect

With the advancement of science and technology and changes in social needs, the future development direction of composite antioxidants is gradually becoming clear. Here are a few trends worth paying attention to:

  1. Intelligent design: By introducing intelligent responsive materials, composite antioxidants can automatically adjust their activity according to environmental conditions, thereby achieving a more accurate protection effect.
  2. Green and environmentally friendly: With the increasing global attention to environmental protection, the development of low-toxic and degradable composite antioxidants will become an inevitable choice.
  3. Multi-functional integration: Future composite antioxidants should not only have excellent antioxidant properties, but also have antibacterial and fire-proof functions to meet the needs of diversified application scenarios.

In short, the research on composite antioxidants has moved from simple theoretical exploration to a deep expansion stage of practical applications. Whether it is a top foreign university or a domestic research institute, they are contributing their wisdom and strength to this field. I believe that in the near future, composite antioxidants will surely set off a new revolution in the field of building materials.

The unique advantages of composite antioxidants: Superheroes who “spend life” for building materials

Looking at the whole text, we have explored the unique advantages of composite antioxidants in extending the service life of building materials from multiple perspectives. It is not just a simple additive, but also a superhero who combines multiple skills to escort the “longevity journey” of building materials. Next, let us review and summarize the core competitiveness of compound antioxidants again.

Excellent comprehensive performance: a model of teamwork

The highlight of composite antioxidants is their strong comprehensive performance. By cleverly combining the primary and auxiliary antioxidants, it can simultaneously cope with challenges such as radical capture, peroxide decomposition, and synergistic efficiency. This “team combat” method allows compound antioxidants to faceIt is easier to be comfortable in complex oxidative environments than the performance of a single antioxidant.

Wide applicability: versatile all-rounder

Whether it is concrete, asphalt, plastic or steel structure, composite antioxidants can be adjusted according to different material characteristics, showing extremely high applicability. This flexible and versatile capability makes it an indispensable multi-functional tool in the construction industry.

Long-term stability: a loyal guardian of lasting protection

Thanks to its excellent thermal stability and low volatility, composite antioxidants can maintain stable performance output during long-term use. Even under harsh conditions such as high temperature and humidity, it can still stick to its post and provide continuous protection for building materials.

Green and environmentally friendly: a wise choice to adapt to the times

As society continues to pay more attention to sustainable development, compound antioxidants are also moving towards a more environmentally friendly direction. Many new composite antioxidants have achieved low toxicity and degradability characteristics, providing strong support for the green development of building materials.

Looking forward: A new journey with infinite possibilities

Standing at a new historical starting point, compound antioxidants are ushering in unprecedented development opportunities. Trends such as intelligent design, multi-function integration and green environmental protection will inject more innovative elements into this field. It can be foreseen that future composite antioxidants will play a more important role in the field of building materials, helping to create a safer, durable and environmentally friendly architectural world.

As the classic saying goes, “If you want to do a good job, you must first sharpen your tools.” Compound antioxidants are such a powerful tool that provides a solid guarantee for the long-term stability of building materials. Let us look forward to the fact that with the help of this superhero, more architectural miracles will be born in the future!

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Optimize electronic product packaging process with composite antioxidants to ensure high-quality products

3月 15th, 2025 News

Composite antioxidants: Invisible Guardian of Electronic Product Packaging Process

In the world of electronic products, tiny chips and circuit boards are as important as the human brain and neural network. However, these precision electronic components face various threats from the outside world – oxidation is one of them. Oxidation reactions not only shorten the life of electronic products, but may also lead to performance degradation or even complete failure. To address this challenge, scientists invented a magical material – composite antioxidants. It is like a “golden bell cover” for electronic products, allowing them to maintain excellent performance in harsh environments.

This article will start from the basic principles of composite antioxidants and deeply explore its application in electronic product packaging processes, and analyze in detail how to optimize the process to ensure high-quality products through specific cases. We will also combine new research results at home and abroad to unveil the mystery of this field for you in easy-to-understand language. Whether you are an industry practitioner or an ordinary reader interested in technology, this article will provide you with a detailed knowledge feast.

What are compound antioxidants?

Definition and mechanism of action

Composite antioxidants are chemicals composed of multiple antioxidant components that are designed to delay or prevent the oxidation process of the material through synergistic action. Its main functions can be summarized as follows:

  1. Capture free radicals: Oxidation reactions usually start with the formation of free radicals, and composite antioxidants can effectively capture these unstable molecules, thereby interrupting the oxidation chain reaction.
  2. Decomposition of peroxides: Some types of antioxidants are specifically used to decompose harmful peroxides to prevent them from further damage to the material structure.
  3. Stable environmental conditions: By adjusting the local environment (such as humidity, temperature, etc.), reduce the impact of external factors on the material.

Depending on the ingredients, compound antioxidants can be divided into the following categories:

  • Main antioxidant: Core inhibitors directly involved in the oxidation reaction, such as hindered phenolic compounds.
  • Supplemental antioxidants: Assist the main antioxidants to play a role and enhance the overall effect. Common ones include phosphites and thiodipropionate.
  • Ultraviolet absorbers: Protect materials from aging problems caused by ultraviolet radiation.

Why choose compound antioxidants?

Although single antioxidants are low in cost, they often cannot meet the needs of all-round protection in complex environments. Complex antioxidants, through the synergistic effect of multiple components, are differentIn the stage, we will give full play to our respective advantages and form a stronger protective barrier. This combination strategy not only improves efficiency, but also reduces the amount of use, truly achieving “multiple results with half the effort”.

Application of composite antioxidants in electronic product packaging

Introduction to Packaging Technology

Electronic product packaging refers to sealing exposed chips or components in a protective case to isolate external adverse environments (such as moisture, dust, corrosive gases, etc.). A good packaging can not only improve product reliability, but also extend service life. However, the packaging material itself may also age due to oxidation, resulting in a degradation of sealing performance. Therefore, the introduction of composite antioxidants has become one of the key steps in improving packaging quality.

Special application of composite antioxidants

The following are examples of application of composite antioxidants in several common packaging materials:

Application Scenario Material Type Compound antioxidant formula Main Function
Mold Compound Epoxy Stealed phenol + phosphite Prevent epoxy resin from degradation and maintain mechanical strength
Lead Frame Copper alloy Thiodipropionate + antioxidamine Suppress copper surface oxidation and maintain conductivity
Adhesive Silicone Rubber UV absorber + hydroxylamine Improve weather resistance and enhance bonding performance
Heat Sink Aluminum alloy Phosphate + borate Reduce corrosion of aluminum and improve heat dissipation efficiency

Case Analysis: Application in Plastic Seal Materials

Plastic encapsulation materials are one of the commonly used packaging forms, especially in the field of integrated circuits (ICs). However, traditional epoxy resins are prone to oxidation and degradation in high temperature environments, resulting in cracking or peeling of the encapsulation layer. To solve this problem, engineers added composite antioxidants to the epoxy resin. After testing, it was found that after adding a specific proportion of hindered phenols and phosphites, the thermal stability of the material was significantly improved, and the elongation of break also increased.

The experimental data are shown in the following table:

Test items No antioxidant added Add compound antioxidants
Thermal deformation temperature (?) 145 168
Elongation of Break (%) 2.3 4.7
Oxidation induction time (min) 12 35

It can be seen that the introduction of composite antioxidants has greatly improved the overall performance of plastic sealing materials.

How to optimize process to ensure high-quality products

Process Optimization Principles

In the actual production process, it is not enough to just choose the right composite antioxidant, and scientific and reasonable process design is also required to give full play to its effectiveness. Here are some key optimization measures:

  1. Precisely control the amount of addition

    • A high amount of addition may lead to insufficient protection effect;
    • Excessive addition may cause other side effects (such as reducing liquidity or affecting transparency).
    • Recommended range: 0.1%-0.5% of primary antioxidant, 0.05%-0.2% of secondary antioxidant.

  2. Evening dispersion

    • Use efficient mixing equipment to ensure that antioxidants are evenly distributed in the substrate and avoid weak protection in local areas.

  3. Reasonable proportion

    • Adjust the proportion of each component according to the specific application scenarios and find the best balance point.

  4. Monitoring processing conditions

    • Facts such as temperature, pressure, and time will have an impact on the effect of antioxidants and must be strictly controlled.

Practical case: The successful experience of a well-known mobile phone manufacturer

A internationally renowned brand encountered the problem of aging of battery compartment packaging materials when developing a new generation of smartphones. After in-depth research, they decided to adopt a new composite antioxidant regimen. By systematically optimizing the production process, this problem was finally solved successfully and the product passed strict reliability measurementTry (such as high temperature storage, humidity and heat circulation, etc.). This case fully demonstrates the important role of composite antioxidants in high-end electronic products.

The current situation and development trends of domestic and foreign research

Foreign research trends

In recent years, European and American countries have made many breakthroughs in the field of compound antioxidants. For example, BASF, Germany has developed a new antioxidant based on nanotechnology, with particle sizes of only a few dozen nanometers and higher activity and dispersion. In addition, DuPont, the United States has also launched an environmentally friendly composite antioxidant that can reduce the impact on the environment without sacrificing performance.

Domestic research progress

my country’s research on compound antioxidants started late, but developed rapidly. A study from the School of Materials at Tsinghua University shows that multifunctional antioxidants synthesized through molecular design can provide comprehensive protection in multiple dimensions. At the same time, the Institute of Chemistry, Chinese Academy of Sciences is exploring the use of biodegradable materials as carriers to further improve the safety and sustainability of composite antioxidants.

Future development direction

As the integration of electronic products continues to increase, the requirements for packaging materials are becoming increasingly stringent. The future compound antioxidants will develop in the following directions:

  1. Intelligent: It has self-healing function and can actively respond when damage occurs.
  2. Greenization: Use non-toxic and recyclable raw materials, in line with environmental protection trends.
  3. Customization: Customize exclusive solutions according to the needs of different customers.

Conclusion

Composite antioxidants, as one of the core technologies in electronic product packaging processes, are attracting more and more attention with their excellent performance and wide application prospects. Whether it is basic theoretical research or practical engineering applications, there is still a lot of room for exploration. I hope this article will open the door to this wonderful world for you, and let us look forward to the birth of more innovative achievements together!

Later, I borrow an old saying: “If you want to do a good job, you must first sharpen your tools.” For the electronics industry, compound antioxidants are undoubtedly the indispensable weapon!

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Complex antioxidants: Ideal for a variety of complex formulations, helping to achieve diverse product designs

3月 15th, 2025 News

1. Definition and background of composite antioxidants

In the modern industrial field, the aging problem of materials has always been one of the key factors that restrict product life and performance. Whether it is plastic products, rubber products or polymer materials, they will be affected by various external factors such as oxygen, ultraviolet rays, thermal energy during use, resulting in performance degradation or even failure. This phenomenon is called “oxidative aging”. To solve this problem, scientists have developed a variety of antioxidants and combined different types of antioxidants through compounding technology to form an efficient and versatile solution – composite antioxidants.

1.1 Basic concepts of composite antioxidants

Composite antioxidant is a mixture of two or more antioxidant components designed to enhance antioxidant effects through synergistic effects. It can not only delay the aging process of the material, but also improve the processing performance, mechanical properties and weather resistance of the material. Compared with single antioxidants, composite antioxidants have a wider range of applications and higher cost performance, making them ideal for many complex formulations.

From a chemical point of view, composite antioxidants usually contain the following main ingredients:

  • Free radical capture agents: such as phenolic compounds (BHT, ascorbic acid, etc.), are used to capture free radicals generated in the material and prevent the occurrence of chain reactions.
  • Peroxide decomposition agent: For example, thiodipropionate substances can decompose peroxides in the material to prevent them from further induced oxidation reactions.
  • Metal ion passivator: Such as chelating agents (EDTA, citric acid, etc.), by binding to metal ions, inhibit the oxidation reaction caused by metal catalysis.
  • Auxiliary antioxidants: Such as phosphites, they can enhance the effect of the main antioxidant while reducing volatility and toxicity.

These components cooperate with each other to jointly build a multi-level protection system, allowing composite antioxidants to show excellent performance in various complex environments.

1.2 Development history and market demand

The history of research and development of composite antioxidants can be traced back to the mid-20th century. With the widespread application of polymer materials, people’s requirements for material stability are also increasing. The initial antioxidants are mostly single components, such as phenol compounds, but due to their single function and limitations, it is difficult to meet diverse needs. In order to break through this bottleneck, researchers have begun to try to combine different types of antioxidants in order to obtain better comprehensive performance.

After entering the 21st century, with the increase in global environmental awareness and the increase in demand for high-performance materials, composite antioxidants ushered in a golden period of rapid development.Especially in the fields of automobile manufacturing, electronic appliances, construction and building materials, the demand for composite antioxidants has shown explosive growth. According to statistics, in 2022 alone, the global compound antioxidant market size has exceeded US$3 billion, and it is expected to maintain an average annual growth rate of 5%-7% in the next few years.

1.3 Application scenarios and importance

The application scenarios of composite antioxidants are extremely wide, covering multiple industries such as plastics, rubbers, coatings, and lubricants. For example, in the manufacturing of automotive parts, composite antioxidants can effectively extend the service life of tires, bumpers and other components; in the field of food packaging, it can ensure that packaging materials will not affect food safety due to oxidation during long-term storage; while in the medical device industry, composite antioxidants help maintain product biocompatibility and stability.

In addition, with the promotion of green chemical concepts, low-toxic, harmless, and environmentally friendly composite antioxidants have gradually become the mainstream of the market. This not only reflects the progress of technology, but also reflects the society’s high attention to sustainable development. It can be said that composite antioxidants have become an indispensable part of modern industry, providing strong support for achieving diversified product design.

2. Mechanism and classification of compound antioxidants

To gain a deeper understanding of the magic of compound antioxidants, we need to start with their mechanism of action. Simply put, composite antioxidants prevent or slow down the oxidation process of the material through a series of complex chemical reactions, thus protecting the material from damage. Next, we will discuss its specific mechanism of action in detail and classify it scientifically according to its function.

2.1 Mechanism of action of composite antioxidants

The oxidation process of a material is usually a chain reaction, including three stages: chain initiation, chain propagation and chain termination. Complex antioxidants exert their protective role by intervening in key steps in these phases.

  • chain initiation stage: At this stage, some active molecules (such as hydroperoxides) in the material will decompose under the action of external factors (such as light, heat, and oxygen) to form free radicals. The free radical trapping agents in the composite antioxidants quickly bind to these free radicals, converting them into stable compounds, thereby blocking the starting point of the chain reaction.

  • Channel propagation stage: If the chain initiation cannot be stopped in time, the free radicals will continue to react with other molecules, producing more free radicals, resulting in the chain reaction to continue to spread. At this time, peroxide decomposition agents are on the scene, and they can decompose peroxides into inactive products, thereby interrupting the process of chain propagation.

  • Channel Termination Phase: Even if the first two stages are controlled, there may still be a small amount of uneliminated free radicals. At this time, the auxiliary antioxidant will be sent.In use, they can completely eliminate residual free radicals by synergistically with other antioxidants, ensuring that the entire oxidation process is completely stopped.

It is worth mentioning that the effect of composite antioxidants is not limited to the antioxidant itself, it can also improve its processing performance and the appearance quality of the final product by adjusting the microstructure of the material. For example, some composite antioxidants can reduce the viscosity of the material at high temperatures and make it easier to form; others can reduce defects on the surface of the material and give the product a smoother touch.

2.2 Classification of composite antioxidants

Depending on the function and mode of action, compound antioxidants can be divided into the following categories:

Category Typical Ingredients Main functions
Free Radical Capture Phenol compounds (BHT, ascorbic acid, etc.) Catch free radicals and prevent the propagation of chain reactions
Peroxide decomposition agent Thiodipropionate Decompose peroxides to prevent them from further induced oxidation reactions
Metal ion passivator Chalking agents (EDTA, citric acid, etc.) Binding metal ions, inhibiting oxidation reaction caused by metal catalysis
Auxiliary Antioxidants Phosophites Enhance the effect of the main antioxidant while reducing volatile and toxicity

In addition, there are some special functions of composite antioxidants, such as light stabilizers for UV protection and high temperature resistant antioxidants for extreme environments. These products often require a combination of technologies and processes to achieve good performance.

2.3 Current status of domestic and foreign research

Scholars at home and abroad have achieved remarkable results in the study of composite antioxidants. For example, the Irganox series of composite antioxidants developed by DuPont in the United States are well-known for their excellent stability and environmentally friendly properties; Mitsubishi Chemical in Japan has launched green antioxidants based on natural plant extracts, which are widely favored by consumers. In China, the Institute of Chemistry, Chinese Academy of Sciences has also made a series of breakthroughs in the field of composite antioxidants in recent years, especially in the international leading position in the research and development of nano-scale composite antioxidants.

However, despite significant technological advances,Antioxidants still face challenges such as how to further improve their efficiency, reduce costs and develop more new products that meet green environmental requirements. These issues will be the focus of future research.

3. Advantages and application examples of composite antioxidants

If composite antioxidants are a key, then their advantage is to open the secret weapon to the door to high-quality product design. Compared with traditional single antioxidants, composite antioxidants have many unparalleled advantages. Let’s analyze them one by one.

3.1 Core advantages of composite antioxidants

  1. Veriodic: Compound antioxidants can solve various problems at the same time, such as both oxidation and UV protection, which not only improves heat resistance and improves processing performance. This “one-stop” solution greatly simplifies formula design and reduces production costs.

  2. Synergy Effect: The mutual cooperation between different components will produce obvious synergies, making the overall performance far exceed the sum of each part. For example, the combination of free radical capture agent and peroxide decomposition agent can significantly improve the antioxidant efficiency and achieve twice the result with half the effort.

  3. Strong adaptability: Due to the use of multiple ingredients, composite antioxidants can adapt to various complex usage environments and harsh conditions. Whether it is engine parts that work under high temperature and high pressure, or refrigerator seals used in low temperature environments, it can work with ease.

  4. Environmental Friendly: With the increasing strictness of environmental regulations, more and more composite antioxidants are made of renewable raw materials or biodegradable materials, greatly reducing the negative impact on the environment.

3.2 Typical application case analysis

In order to better understand the practical application value of composite antioxidants, we selected several typical industry cases for in-depth analysis.

Case 1: Automobile tire manufacturing

In the production of automobile tires, rubber materials are prone to oxidation and aging due to long-term exposure to air, resulting in problems such as decreasing strength and deteriorating wear resistance. By adding composite antioxidants, not only can this process be effectively delayed, but the flexibility and elasticity of the rubber can also be improved. A well-known tire manufacturer introduced a new composite antioxidant into its high-end product line, and the results showed that the product’s service life was extended by nearly 30%, and customer satisfaction was greatly improved.

Case 2: Food packaging materials

For the food packaging industry, safety is always the primary consideration. Traditional antioxidantAgents may migrate to food, posing potential health risks. Compound antioxidants successfully solved this problem by optimizing the formula and selecting low mobility ingredients. For example, a European company developed a composite antioxidant specifically used in polyethylene films. It has been tested and proved that its migration volume is less than one thousandth of the EU standard limit, winning wide recognition from the market.

Case 3: Medical device coating

In the field of medical devices, compound antioxidants also play an important role. For example, coating a polymer film containing composite antioxidants on the surface of an artificial joint can significantly improve its biocompatibility and corrosion resistance. An American medical device company used this technology to extend the service life of artificial hips from the original 10 years to more than 20 years, bringing good news to patients.

IV. Technical parameters and selection guide for composite antioxidants

For engineers and technicians, it is crucial to understand the specific technical parameters of composite antioxidants. Only by mastering this data can you make an optimal choice in practical applications. The following are several key indicators and their reference values:

Parameter name Unit Typical Range Remarks
Antioxidation efficiency % 85%-99% Indicates the ability to capture free radicals
Thermal Stability °C 200°C-350°C The ability to maintain activity at high temperatures
Processing Flowability Pa·s 0.1-1.0 Influences the fluidity and uniformity of materials during processing
Volatility mg/m³ <10 The lower the better, avoid affecting product quality
Biotoxicity LD50 (mg/kg) >5000 Complied with international safety standards

Of course, the specific selection needs to be combined with actual application scenariosConduct a comprehensive assessment. For example, if the goal is for food contact materials, low mobility and high purity composite antioxidants should be given priority; if it is used in high temperature environments, its thermal stability and durability should be focused on.

5. Future development and prospects of composite antioxidants

With the advancement of technology and changes in social needs, compound antioxidants are developing towards more intelligent, personalized and environmentally friendly. The future composite antioxidants will no longer be limited to simple chemical compounding, but will incorporate more cutting-edge technologies, such as nanotechnology, biotechnology, etc., to achieve higher performance and lower costs.

In addition, artificial intelligence and big data analysis will also provide strong support for the research and development of composite antioxidants. By simulating the performance of different formulas under various conditions, researchers can quickly screen out the best solutions and significantly shorten the development cycle.

In short, as an important part of modern industry, composite antioxidants have unlimited development prospects. Let us wait and see and look forward to more exciting innovations in this field!

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