Preparation and properties of low fibrillated antibacterial Lyocell fiber

In the process of Lyocell fiber-forming, nano zinc oxide was added to prepare the fabric with antibacterial function. The chemical structure and crystal structure of the fabric were analyzed by Fourier transform infrared spectroscopy and X-ray diffraction, which show that the chemical structure of the fiber was not significantly changed, however the crystallinity decreased obviously. The thermogravimetric test results show that the thermal stability of the fabric doped with nano-ZnO is not affected. The results of the physical and mechanical properties of the fabric show that the Lyocell fabric has better wear resistance, the bursting strength decreases by about 20% compared with the fabric before doping, and the whiteness of the fabric increases. Lyocell fabric has a good killing effect on microorganisms, and the antibacterial rate of staphylococcus aureus and Escherichia coli can reach 97%. Finally, the dyeing experiments show that the effect of ZnO on the dyeing property of the fiber is limited, which is controlled in the range that can not be recognized by human eyes. It must be mentioned that the idea and novelty of this paper were adding nano ZnO in dry-jet wet spinning process to prepare ZnO-Lyocell, and increase some physical and chemical properties of lyocell, and the role of nano ZnO was like a doping material, which providing the fiber with long-lasting antibacterial properties.