LAUSR

A thermally conductive epoxy polymer composite comprising copper nanowires and reduced graphene oxide as hybrid fillers was prepared. The synthesized one-dimensional copper nanowires (CuNWs) with excellent thermal conductivity and easy dispersity performed a thermal bridge to connect different layers of dimensional graphene oxide (GO), which benefited the thermal conductivity of epoxy composite conductor with increasing hybrid filler loading. The microstructure and morphology of hybrid fillers as well as the thermal properties, volume resistivity and dielectric constant of epoxy polymer composite were investigated. The TEM of hybrid fillers confirmed that CuNWs were loaded on the NH2-rGO uniformly and the CuNWs/NH2-rGO/epoxy possessed higher thermal conductivity and lower volume resistivity (the thermal conductivity and volume resistivity were about 0.43 W/(m · K) and 2.69 × 1011 Ω · cm, respectively) compared to CuNWs/epoxy polymer composite and NH2-rGO/epoxy polymer composite. Moreover, the CuNWs/NH2-rGO/epoxy composites presented better dielectric constant. These were all contributed to the synergetic effect between CuNWs and rGO.