Preparation And Performance Of Anti-Bacterial,Anti-UV And Sensing Multifunctional Fabrics

Natural fiber fabrics are popular with the public because of their outstanding advantages such as moisture adsorption and air permeability.However,with rapid development of living standards and technology,natural fiber fabrics with single functionality can't meet commercial demands,multi-functional natural fiberfabrics has gained respectable progress in recent years.In this work,we report the fabrication of freestanding,flexible and multifunctional natural composite fabric,by combination of GO with natural fiber fabrics(silk,cotton and linen fabric),the composite fabrics were demonstrated conductivity,anti-bacterial,anti-ultraviolet properties.The main research contents and conclusions are as follows:(1)Graphene oxide(GO)was successfully prepared by Hummers method,then followed by reduction process,it was reduced to reduced oxidized graphene(RGO),which was combined with polypropylene(PP)nonwoven fabric to obtain composite fabric RGO/PP.The RGO/PP fabric exhibited good anti-bacterial and anti-ultraviolet properties.The anti-bacterial rate of 5 wt%RGO/PP fabric to Escherichia coli(E.coli)and Staphylococcus aureus(S.aureus)reached 75.3%and 78.9%,respectively.In comparison with PP,the anti-ultraviolet property of RGO/PP was significantly improved.Furthermore,As-prepared RGO/PP fabric was served as NO₂ gas,which exhibited high sensitivity,remarkable reliability and feasibility.(2)The GO was first dispersed in N-methylpyrrolidone,and then spray-coated on silk fabrics as finishing agent to obtain composite silk fabrics.When the loading amount of GO was 92.3%,the composite silk fabrics showed the highest anti-bacterial property,the anti-bacterial rate of which was 88.6%to S.aureus.The composite silk fabric was also proved to have good UV resistance,and the UPF of which was increased from 17 to 39.The air permeability of the composite silk fabric showed slightly decrease,and its moisture adsorption remained.The mechanical properties of the composite silk fabric showed greatly improvement.(3)The GO was combined with cotton fabric to produce composite cotton fabrics.Based on the excellent moisture adsorpotion of the cotton fabrics,all of the composite cotton fabric samples met the WVT entry-level standards of clothing.In addition,all of the composite cotton fabric samples showed good anti-bacterial properties against E.coli and S.aureus.At the same time,GO can greatly prevent fabric from UV light.With increase of GO amount,the anti-UV effect of composite fabrics was also enhanced.Finally,a flexible gas sensor device is prepared by the composite cotton fabric,which exhibits excellent sensing performance for NH₃ gas.(4)The RGO was combined with linen fabrics to produce composite linen fabrics RGO/LN through reduction and followed suction filtration.As-prepared RGO/LN fabric was served as methane gas and strain sensor,which exhibited high sensitivity,remarkable reliability and feasibility.Furthermore,the RGO/LN fabric sensor exhibited very good moisture permeability and air permeability.In this study,the multi-functional natural fiber fabric based on graphene modification is prepared.The composite fiber fabric has good anti-bacterial,anti-ultraviolet and sensing functions,and represents that composite fabric has great potential as wearable smart devices in personal healthcare applications.