Preparation and Application of Nanometer TiO2 Hydrosol in Cashmere Fabric

Nano-meter oxide is a new approach to improve the performance of the fabrics. There are many kinds of methods to prepare nano-meter oxide, including relatively simple sol-gel method and micro-emulsion method. Nano-meter TiO2 hydrosol is prepared by combining sol-gel method with micro-emulsion method. Because anti-pilling performance has strict demands from the finishing method, there is no simple and effective method to solve the anti-pilling problem of cashmere fabrics currently. The existed finishing methods for wool have its detrimental effect on environment or hand feeling of fabric. In order not to affect the handle of cashmere fabric, the cashmere fabric must firstly be finished by oxidation-sericin method, a new ecology protection type finishing method on anti-pilling of cashmere fabric, whose optimum process conditions were obtained by universal rotating combination design method and analyzing the fabric pilling degree before and after the oxidation-sericin processing. Then, cashmere fabric was finished by TiO2 hydrosol. This optimal technology was obtained by orthogonal experiment. The general optimum route: 40mI/L hydro peroxide concentration, 50 degrees C, 50min, pH=7, 4.56% sericin concentration, 44.35 degrees C, 40.57min, pH=6, 0.825mg/ml TiO2 hydrosol concentration, 45 degrees C, 30min. The experimental results show that the anti-pilling and anti-static properties of the cashmere fabric finished by this process were improved.