Abstract:

Tetrabutyl titanate was used as raw material and sol-gel method was chosen to prepare titanium dioxide sol .Using the time of gel as a evaluation system, through analyzing the single dispersant with tetrabutyl titanate, water, glacial acetic acid, absolute ethyl alcohol and trolamine, mixture ratio coverage of each reactant are determined, after that by orthogonal test and optimality analysis, the optimal mixture ratio is fixed and the optimal technological parameter are gained. By means of solid contents and granularity of the titanium dioxide sol and infra-red spectrum, the widespread existence of nano titanium dioxide is proved. Then the self-cleaning performance of finishing cashmere knitted fabric is tested. The results show that after 48 hours of natural light, the oil stain can be completely decomposed. It indicates that the cashmere knitted fabric that contains 80% nano-TiO2 finishing agent has great self-cleaning performance.

Key words: nano-TiO2, self-cleaning, sol, cashmere fabric