Application of the hottest nano ATO powder in poly

2022-08-23
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Application of nano ATO powder in polymer antistatic packaging continued

2 antistatic fiber

nano inorganic powder modified fiber material is gradually becoming an important development direction of fiber material modification. Compared with other types of antistatic fibers, nano metal oxide antistatic fibers have many unique excellent properties, such as good stability without the limitation of climate and use environment; Nano scale metal oxide is not easy to fall off from the fiber, and the distribution is relatively uniform; The fiber preparation process is simple; Fiber has a wide range of applications, and can be used in almost any occasion requiring anti-static. New nano transparent conductive powder is favored by people because of its transparency and excellent conductivity. There are three main ways to apply nano ATO to the antistatic treatment of chemical fibers:

1) directly add nano ATO powder during fiber spinning. The key is the compatibility between inorganic nano ATO and fiber materials, and special dispersion additives need to be added

2) add nano ATO or its aqueous suspension in the dyeing process of raw materials (such as wool tops and polyester fibers) to complete the dyeing and functionalization in one step

3) add nano ATO aqueous suspension in the dyeing or finishing process of grey cloth

Wang Dong and others in the State Key Laboratory of fiber modification of Donghua University used nano powder ATO powder as antistatic agent and polyethyleneimine (PEL) as dispersant to stably and evenly disperse nano ATO in deionized water, and used the suspension as a preheating bath in the spinning process of polyacrylonitrile fiber for the first time to improve the antistatic property of PAN fiber. Due to the concentration difference of nano inorganic particles inside and outside the fiber and the existence of a large number of micropores inside the primary PAN fiber, nano ATO particles can enter the fiber or be adsorbed on the surface of the fiber through diffusion and migration. When the PAN fiber is stretched, dried and densified, nano ATO can remain in the fiber and form a conductive channel for local contact of nano ATO, giving the PAN fiber antistatic. The experimental results show that the volume specific resistivity of nano ATO modified PAN fiber decreases by three orders of magnitude, and has good antistatic properties. At the same time, it basically maintains the mechanical properties of the original three key development directions of the fiber. In addition, the national superfine powder engineering research center is also carrying out research on the application of nano ATO in the preparation of anti static fibers and many other fields

at present, the main method to improve the electrostatic property of polyester fabric is to use organic antistatic agent to carry out antistatic finishing through simple fabric finishing technology. However, organic antistatic agents have many problems, such as high dependence on environmental humidity and poor durability of antistatic effect. Therefore, seeking an antistatic agent with excellent and durable antistatic performance has become a research and development hotspot. Wu Yue et al. EMI applied nano ATO powder to the antistatic treatment of polyester fabric. The experimental results showed that the surface resistance of polyester fabric treated with nano ATO antistatic finishing agent was reduced from the untreated 1012 to 1010. After washing for 50 times, the antistatic effect was basically unchanged. Chen Xuehua and others finished polyester fabric with anti-static function of nano ATO antistatic agent by coating method. The experimental results show that only when ATO particles are exposed to the surface of the film, it can play its anti-static performance; When ATO particles exist in the coating in the form of partial annihilation in the film and partial exposure on the film surface, the antistatic performance of the film will last. Ding Zhongfu and others used nano ATO powder with different antimony doping amount for antistatic treatment of polyester knitwear. The research shows that the doping amount of powder is one of the main factors affecting the antistatic performance. Within the test range of 4% to 8% antimony doping amount, the more the doping amount, the better its antistatic performance, but the color of the powder also deepens, which will affect its use in light colored textiles

fiber functionalization is an important development trend of synthetic fibers. China is a large country in the production and consumption of chemical fiber, and the antistatic treatment of chemical fiber will be one of the important application markets of nano ATO powder

3 antistatic plastics

at present, antistatic polymer materials processed by adding various inorganic conductive fillers (such as copper powder, silver powder, carbon black, etc.) into the matrix polymer are of the most use value. The volume resistivity of the composite materials is rising in a large range. In particular, the volume resistivity of the composite materials is increased in a large range. In addition, it can be used to protect the current machinery, such as copper powder, silver powder, carbon black, etc.oh, No, Therefore, its application is also limited. Nano ATO powder has small particle size, good compatibility with plastics and light color, which widens the field of application of conductive powder in plastics. The main problems to be solved in the application of nano ATO powder in the anti-static of plastic surface are the relationship between the addition amount and the mechanical properties of the material, as well as the dispersion of nano powder in the matrix resin. For example, special processes such as skin core structure and multi-layer extrusion can be adopted, which requires the preparation of nano ATO conductive plastic masterbatch in advance

4 conclusion

compared with traditional antistatic materials, nano ATO powder has significant advantages, has broad application prospects in the field of antistatic polymer materials, and has great potential to develop 11 light aggregate. How to develop and make good use of these advantages of nano ATO and make it stand firmly in the market, the following aspects need to be further studied

1) agglomeration of nano ATO powder. From the current preparation level that must be inserted into the power socket with protective grounding, no matter which method is used to prepare the powder, the particles tend to gather together to form secondary particles, or even tertiary particles, which greatly affects the service performance of nano powders. Therefore, we must start with the agglomeration mechanism to explore a practical solution to the agglomeration problem of nano powder during preparation and storage

2) there are many reports on the preparation methods of nano ATO powder, but most of them are at the level of laboratory sample preparation. There are few methods that can really be industrialized and mass produced. Efforts need to be made to explore the best preparation methods and engineering amplification technology

3) actively explore new application fields of nano ATO powder to better contribute to improving people's living standards

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