Preparation And Property Of Nonwovens Coated With Nano-ZnO

Nano-ZnO is a new type of nano-functional material. It possesses a lot of excellent functions, such as Photocatalytic function, UV shielding effectiveness, antimicrobial deodorant function and so on. In addition, nano-ZnO is an environmental friendly material . These properties make it gradually applied in industrial textiles. In order to get nano-ZnO finishing agent, nano-ZnO should be dispersed in aqueous medium. Since then, nano-ZnO finishing agent is loaded on the textiles by finishing methods. The textile products have anti-bacterial deodorant, anti-ultraviolet and sewage treatment and so on. The finishing methods increase the textile products and have broad prospects for development.In this paper, the nano-ZnO powder is dispersed in water medium by using chemical methods, and studied the effective of ultrasonic power, single-dispersant, modifier, composite dispersant(Lou-sodium polyycrylate, sodium dodecyl sulfate)on the performance of the nano-ZnO dispersion. The experimental results showed that: In the ultrasonic power on 1600W, the dispersing effect of the composite dispersion is good based on using modifier to modify the nano-ZnO.In order to determine the best dosage of dispersant, the orthogonal experiment was designed. The results showed that: When the mass ratio of the composite dispersant to the nano-ZnO is 1︰7and the mass ratio of the two dispersing agent in composite dispersing is 4︰6(Low-sodium polyyctylate︰sodium dodecyl sulfate), the dispersing effect of the nano-ZnO dispersion is best. Atomic force microscopy (AFM) was employed to characterize the particle size and distribution of nano-ZnO particles. Results indicated that the dispersive effect of compound dispersant and the stability of aqueous dispersed solution were better, the average particle size of nano-ZnO particles was less than 100nm, and there is no particle diameter greater than 1um. Nano-ZnO finishing agent was loaded on the Non-woven material by immersion treament. AFM was used to analysis the nano-ZnO particle on non-woven material. The results indicated that most nano-ZnO particle size were still in the nanometer range. The photocatalysis of nano-ZnO is studied by arranging experiments that non-woven material loaded nano-ZnO finishing agent depredated the methylene blue. The results showed that the degradation rate of methylene blue has exceeded 80% within 120 minutes. To enhance the fastness of nano-ZnO finishing and non-woven, Adhesive DM5125 was added in the nano-ZnO finishing agent. Experiments indicated that it did not dramatically affect the dispersion properties of nano-ZnO, Therefor, the fastness of nano-ZnO finishing and non-woven has strengthened remarkably. The photocatalytic activity of nano-ZnO still maintained above 50% after 8 times washing. This is far reaching its application requirement .We prepared much non-woven materials loaded on nano-ZnO finishing agent which had different dispersion properties and different concentrations and tested the UV ray transmittance and calculated the UV protective ratio. The experimental results showed that the small of the particle size of the nano-ZnO finishing agent, the higher the UV ray transmittance and when the viscosity of the nano-ZnO finishing agent was diluted less than 10 times, It had little effect to the UV protective ratio.