Preparation And Multifunctional Properties Of Graphene/Nano Silver Composite Conductive Fabric

With the rapid development of society and science,nowadays,people have demands more than wearing and decorating on textile products,and functional and intelligent textiles has become the inevitable trend of development.As is well known,conductive fabric is an important front-end material in the preparation of functional and intelligent textiles.In order to promote the development process of functionalization and intelligentization of textiles,accelerate the transformation and upgrading of textile industry,it is imperative to develop conductive fabric material with excellent performance.In this study,graphene and silver nanoparticles(Ag NPs)were taken as functional materials to endow traditional fabric with excellent conductivity via electrophoretic deposition(EPD)and in-situ chemical reduction.The main research contents are as follows:Firstly,with homemade graphene oxide(GO)as a functional finishing agent,polyethyleneimine(PEI)as a surface modification agent,forming a functional layer on the surface of polyamide fabric through EPD technique,then achieved the reduced graphene oxide(r GO)by environment-friendly hot pressing method from the GO,and accordingly,the polyamide/r GO composite fabric was obtained.The r GO modified polyamide fabrics showed good conductivity(3.3 S/m),thermal conductivity(0.521 W/m?K),hydrophobicity(96.7°)and excellent UV protection property(UPF>500,UVA<0.2%).Secondly,with ascorbic acid as reducing agent,silver nitrate(Ag NO3)solution mixed with polyvinylpyrrolidone(PVP)solution as raw material,water-soluble polyurethane(WPU)as adhesive,constructed PU/Ag/PU sandwich structure on the surface of polyester(PET)fabric in order to fabricate wear resistant conductive fabric.Abrasion resistance tests indicated that the electric resistance of the fabric did not rise obviously after 1050 times of wear cycle test,and the fabric structure remained intact after the friction of 1500 times.It was also found that the utilization of sandwich structure not only greatly enhanced the wear resistance of the fabric,but also significantly improved the electrical conductivity of the fabric.When the Ag NO3 concentration was 0.5%,the electrical conductivity of Ag modified fabric with sandwich structure(18.32 S/m)was 4.76 × 106 times of the ordinary structure(3.85×10-6S/m).Thirdly,electrophoretic deposition and in-situ chemical reduction were used to prepare graphene/nano silver/cotton conductive fabrics.Firstly,graphene oxide nanosheets were deposited on the surface of cotton fabric.After an environment-friendly thermal reduction,cotton/r GO composite fabric(cotton/r GO)was prepared.Subsequently,a small amount of Ag NPs was deposited on the surface of the cotton/r GO fabric by in-situ chemical reduction to prepare the cotton/reduced graphene/silver composite fabric(cotton/r GO/Ag).It was found that the addition of the silver improves the conductivity of the fabric,and the electrothermal property of the fabric has also increased.The temperature of the fabric can rise above 120 ? within 30 s,indicating that the modified fabric possesses excellent electrothermal propertie.