Functional graphene for high dielectric performance polymer composites

Graphene, a two-dimensional monolayer of carbon atoms with conjugated honeycomb structure, has received broad interest owing to its unique physical properties such as high electrical conductivity, excellent mechanical strength, and large surface area. One promising route to harnessing these properties for applications is to improve dielectric properties of polymer by adding graphene sheets at low loading. However, graphene sheets are prone to aggregate, resulting that the improvement of dielectric properties of graphene-based composites is significantly compromised or even unavailable. In this study, we have investigated the effect of functional of graphene sheet on the dielectric properties of the compoistes. The functionalized graphene-based polymer composites show higher dielectric constant and low dielectric loss when compared with graphene composites.