ELECTROMAGNETIC PROPERTIES OF GRAPHENE NANOPLATELETS/EPOXY COMPOSITES IN THE WIDE TEMPERATURE RANGE

摘要

Results of broadband dielectric/electric investigations of epoxy resin filled with graphene nanoplatelets (GNP) are presented in the temperature range of 25-500 K. The percolation threshold in such system was established to be 2.87 wt.%. Above the percolation threshold dielectric permittivity and electrical conductivity are very high in whole frequency range. In this case electrical conductivity occurs via tunneling between GNP clusters. Potential barrier for tunneling decreases with GNP concentration.