Abstract:

In order to synthesis a new type of antibacterical fiber, chitosan grafted antibacterical viscose factor fiber was prepared using viscose fiber as raw material, chitosan as polynuclear antibacterical frament and epichlorohydrin as cross linking agent. The process was optimized, and the structure, bacterial resistance and dyeing property of the fiber were characterized. The results show that the optimum process conditions are the mole ratio of chitosan to epichlorohydrin of  1:0.3, the mass ratio of fiber to chitosan of 1：0.8, the temperature of 100℃, the reaction time is 5 h. 2.0% of chitosan is grafted to surface of the fiber under the conditions, and the grafted thickness of chitosan is up to 0.495μm. The fiber has inhibition ratio of Staphylococcus aureus, Escherichia coli, klebsiella pneumonia and Candida albicans is up to 90%, 88%, 91% and 99%. respectively. Owing to the chitosan, the dyeing fastness and the color fastness of anionic dye are significantly improved, but the dyeing property of cationic dyes are reduced.

Key words: chitosan, viscose fiber, chitosan grafted antibacterial fiber, synthetic process, antibacterial property, dyeing property