Nano-inorganic powder modified fiber materials are gradually becoming an important development direction of fiber material modification. Compared with other types of anti-static fibers, nanoscale metal oxide anti-static fibers have many unique excellent properties, such as being unaffected by climate and use environment, and good stability; nanoscale metal oxides are not easy to get from fibers. Shedding, the distribution is relatively uniform; the fiber preparation process is simple; the fiber is used in a wide range, and it can be used in any occasion where anti-static is required. The new nano-scale transparent conductive powder is prepared for the transparency and excellent electrical conductivity of the product. It is favored by people. There are three main ways to use nano-ATO for anti-static treatment of chemical fiber:
1) Adding nano ATO powder directly during fiber spinning, the key is the compatibility of inorganic nano ATO with fiber material, and special dispersing aid needs to be added;
2) Adding nano ATO or its aqueous suspension during the dyeing process of raw materials (such as tops and polyester filaments) to complete the dyeing and functionalization in one step;
3) Adding a nano-sized ATO aqueous suspension to the dyeing or finishing process of the grey fabric.
Wang Dong and others of the State Key Laboratory of Fiber Modification of Donghua University used nano powder ATO powder as anti-static agent and polyethyleneimine (PEl) as dispersant to stably and uniformly disperse nano-ATO in deionized water. For the first time, the suspension was used as a preheating bath for the spinning process of polyacrylonitrile fibers to improve the anti-static property of PAN fibers. Due to the difference in concentration of nano-inorganic particles inside and outside the fiber and the presence of a large number of micropores inside the primary PAN fiber, the nano-ATO particles can diffuse, migrate into the fiber or adsorb to the surface layer of the fiber. When the PAN fiber is stretched, dried, and densified, The nano ATO can remain in the fiber and form a conductive channel for the partial contact of the nano ATO, imparting anti-static properties to the PAN fiber. The experimental results show that the volume resistivity of nano-ATO modified PAN fiber decreases by three orders of magnitude, has good anti-static properties, and basically maintains the original mechanical properties of the fiber. In addition, the National Ultrafine Powder Engineering Research Center is also conducting research on the application of nano-ATO in the preparation of anti-static fibers and other fields.
At present, the most important method to improve the electrostatic properties of polyester fabrics is to use an organic anti-static agent for anti-static finishing through a simple fabric finishing technique. However, since organic anti-static agents have a large dependence on environmental humidity and poor durability of anti-static effects, an anti-static agent having excellent and durable anti-static properties has been sought as a research and development hot spot. Wu Yue et al. Emi used nano ATO powder for anti-static treatment of polyester fabrics. The experimental results show that the surface resistance of polyester fabric treated with nano-ATO anti-static finishing agent is reduced from untreated >1012 Ω to <1010 Ω, washing 50 times. The anti-static effect is basically unchanged. Chen Xuexue et al. “The anti-static function of nano-scale ATO anti-static agent on polyester fabric was coated by coating method. The experimental results show that only when ATO particles are exposed on the surface of the film, it can exert anti-static performance; when ATO When the particles are partially immersed in the film and partially exposed in the form of the film surface, the anti-static property of the film is long. Ding Zhongfu et al. used nano-ATO powders with different cerium doping amount for the anti-static treatment of polyester knitted fabrics. Studies have shown that the doping amount of powder is one of the main factors affecting anti-static properties, and is doped at 4%-8% antimony. Within the range of the test, the more the doping amount, the better its anti-static property, but the color of the powder will also deepen, which will affect its use on light textiles.
Fiber functionalization is an important development trend of synthetic fibers. China is a large country in the production and consumption of chemical fiber. anti-static treatment of chemical fiber will be one of the important application markets for nano ATO powder.
Related Tags:Colloidal Silver Antibacterial nano silver dispersion