Study On Preparation And Properties Of Graphene-based Multi-functional Textiles

In recent years,with the gradual deepening of scientific research,graphene and its derivatives in the field of textile applications are increasingly widespread,consumer demand continues to promote the new functional graphite textiles,cross-cutting development.In this study,with manganese dioxide,chitosan,polydimethylsiloxane and other additives,the rolling-baking-baking process and layer-by-layer self-assembly technique were adopted to treat fabrics using graphene oxide or graphene oxide as the functional materials.The surface modification and functional addition of the fabric were carried out and a variety of graphene functional textiles were prepared.The properties of the modified fabrics,such as electrochemistry,electrothermal,electromagnetic shielding and water evaporation were investigated respectively.The research work includes the following parts:Firstly,the manganese dioxide nanoparticles were bonded to the surface of the cotton fabric treated with oxidized graphene using a solution in-situ polymerization method.Manganese dioxide / reduced oxidized graphene carbonized cotton fabrics were subsequently prepared by high temperature carbonization.Tests have shown that it has excellent and reproducible electro-chemical properties and electro-mechanical properties.Its specific capacitance could reach up to 329.4 m A h/g and had a 0.78 normally resistance.The modified cotton fabric can be applied to a variety of intelligent textile development.Secondly,using graphene as the functional material and chitosan and sodium polystyrene sulfonate as the assistant,the cotton fabric with nanometer graphene functional film on the surface was fabricated by layer-by-layer self-assembly technique using electrostatic adsorption principle.And the electromagnetic shielding effectiveness was evaluated by the biaxial transmission line method.The results show that with the increase of graphene content,the electrical conductivity increases and the value of electromagnetic shielding(SE)increases.When the graphene content of 7.2%,the SE value of sample could reach up to 31 d B,far beyond the required level of protection for commercial applications 20 d B.Thirdly,the PDMS-graphene layered super-hydrophobic cotton gauze was obtainedby treating the medical degreasing.cotton gauze with the PDMS and the graphene dispersion using the rolling-baking-baking process and Dip-dry process.And its properties were tested and compared with that of carbon black super-hydrophobic cotton gauze.The cotton yarns with different mass fraction of graphene dispersion could float at the air-water interface,and the water contact angle had no significant difference.The interface water temperature of 5% graphene / PDMS super-hydrophobic cotton gauze can be increased to 57.5 ? and the water evaporation efficiency is 4.3 times of that of the natural process under irradiation of 10 W laser light.Its performances are more outstanding than the carbon black / PDMS super-hydrophobic cotton gauze and opens up a new way for the application of graphene in hydrophobic textile materials and evaporation-related fields.