Influence of Graphene Prepared by Chemical Method on Epoxy Resin Electric Conductivity

Abstract:

Graphene (RGO) was prepared successfully through chemical oxidation pyrolysis reduction method. The chemical structure and morphology of the graphene were characterized by means of FTIR, XRD, SEM, TEM and AFM, respectively. It was found that the obtained RGO was a two dimensional material with monolayer or multilayer structure and a few numbers of oxygen containing functional groups on the surface. As conductive nano fillers, the as prepared RGO and commercial CNTs, fullerene, graphite were introduced into epoxy resin (ER) matrix to prepare the composite materials. The influence of the above carbon nano materials on the conductive property of ER was discussed. The results indicate that RGO is a superior conductive nano filler to others, which can improve the electric conductivity of ER greatly. The RGO/ER composite exhibits an electric percolation threshold as RGO volume ration is 0.25%; and the volume conductivity of RGO/ER composite can reach to 2.02×10-7S·m-1 when the RGO volume ratio is 0.50%.

Key words:graphene; carbon nano material; electric conductivity; epoxy resin