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:
- 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.
- Decomposition of peroxides: Some types of antioxidants are specifically used to decompose harmful peroxides to prevent them from further damage to the material structure.
- 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:
-
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.
-
Evening dispersion
- Use efficient mixing equipment to ensure that antioxidants are evenly distributed in the substrate and avoid weak protection in local areas.
-
Reasonable proportion
- Adjust the proportion of each component according to the specific application scenarios and find the best balance point.
-
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:
- Intelligent: It has self-healing function and can actively respond when damage occurs.
- Greenization: Use non-toxic and recyclable raw materials, in line with environmental protection trends.
- 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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