Research On Synthesis,property Of Graphene Oxide And Graphene-based Gels

Due to its excellent optical,mechanics,electronic,thermal properties,graphene has been one of the most widely research materials.In this paper,we are dedicated to study the preparation and properties of graphene and its derivatives gels.In the study,using graphene oxide(GO),polyvinyl alcohol(PVA)aqueous solution as raw materials and water/n-hexane micro-emulsion droplets as the template,we finally prepared graphene oxide/polyvinyl alcohol(GO/PVA)hydro-organogels with three-dimensional network structure and self-healing property.And the corresponding structure of GO/PVA aerogels were obtained by freeze-drying.By adding methyl silicone oil,the GO/PVA organogels with excellent water slippery performance were eventually prepared.In addition,using HI to reduce GO/PVA hydro-organogels,we got graphene/poly(vinyl alcohol)(rGO/PVA)hydro-organogels with the same structure to GO/PVA hydro-organogels.After freeze drying and methyl silicone oil immersion,the rGO/PVA organogels with excellent water slippery and conductivity property were obtained.The main results were as follows:(1)using GO,PVA aqueous solution as raw material and hexane/water micro-emulsion droplets with the “oil-in-water” structure as the template.By means of the amphiphilic of GO and the hydrogen bond formed between the GO and PVA,the GO/PVA hydro-organogels with three-dimensional network structure and self-healing property were finally prepared.(2)Using GO/PVA hydro-organogels as the precursor,by freeze drying and methyl silicone oil immersion,the GO/PVA organogels with super water slippery property and self-supporting character were prepared.Through compression test,the mechanical properties of organogels were better than GO/PVA hydro-organogels.This provides one direction for the development of self-supporting water slippery organogels.(3)Using GO/PVA hydro-organogels as the precursor,and HI as reducing agent,the rGO/PVA hydro-organogels with same structure to GO/PVA hydro-organogels were prepared.After freeze-drying and methyl silicone oil immersion,the excellent water slippery property of rGO/PVA organogels were finally obtained.