Dielectric and microwave attenuation properties of graphene nanoplatelet-epoxy composites

Abstract

Graphene nanoplatelet (GNP)-epoxy composites were fabricated for the investigation of the dielectric permittivity and microwave absorption in a frequency range from 8 to 20 GHz. The intrinsically conductive GNP particles and polarized interfacial centers in the composites contribute to the microwave absorption. A minimum reflection loss of -14.5 dB at 18.9 GHz is observed for the GNP-epoxy composites with 15 wt. % GNP loading, which is mainly attributed to electric conductivity and the charge multipoles at the polarized interfaces in the GNP-epoxy composites. © 2014 Author(s).