Preparation and antibacterial and dyeing properties of chitosan grafted antibacterial viscose fiber

In order to synthesize a new type of antibacterial fiber, chitosan grafted antibacterial viscose fiber was prepared using viscose fiber as raw material, chitosan as polynuclear antibacterial fragment 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 of 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 0.495 μm. The fiber has inhibition rate of Staphylococcus aureus, Escherichia coli, klebsiella pneumonia and Candida albicans is up to 90%, 88%, 91% and 99%, respectively. Owing to the grafting of chitosan, the dyeing fastness and the color fastness of anionic dye are significantly improved, but the dyeing property of cationic dyes are reduced. Copyright No content may be reproduced or abridged without authorization.