Durability and Protective Functional Finishing of Silk Fabric by Chitosan

Abstract

Multifunction of silk fabrics were prepared by adopting glutaraldehyde, chitosan (CS) and graphene oxide (GO). Pure silk fabric was firstly impregnated with a mixture of CS and glutaraldehyde solution forming CS-silk and then immersed into GO dispersion, of which the GO adsorbed on silk fabric was reduced to obtain reduced graphene oxide (RGO)/CS-silk fabric. The effects of mass fraction of CS and mass concentration of GO dispersion on the electrical conductivity, ultraviolet resistance and antibacterial properties of RGO/CS-silk fabrics were investigated, and the washability of the silk fabrics were tested. The results showed that the GO deposited on the surface of RGO/CS-silk fabric was reduced to RGO, and the surface covered with a continuous RGO/CS film. The conductivity of RGO/CS-silk fabric increased with the increase of GO dispersion concentration, which is mainly due to the good conductivity of RGO. The RGO/CS-silk fabric modified by 2% CS solution and treated by 5 g/L GO dispersion solution has the best conductivity, and the surface resistance was 1.13 kΩ/cm. RGO and CS synergistically enhanced the bacteriostasis of RGO/CS-silk fabric, and the antibacterial rate was up to 95%. The RGO/CS-silk fabric modified by 0.5% CS solution and treated by 5 g/L GO dispersion has little change in conductivity, bacteriostasis and ultraviolet resistance after 30–50 washing circles.