Improved Dielectric Properties of Graphene Reinforced Polyvinylpyrrolidone Nanocomposites

Polyvinylpyrrolidone (PVP)-graphene nanocomposites were prepared by a simple solution blending method at various graphene weight percentages. These nanocomposites were characterized by scanning electron microscopy (SEM). The results show that the graphene nanoplatelets were dispersed homogeneously in a PVP matrix. The dielectric parameters (real and imaginary part of relative permittivity, and tangent loss) and AC electrical conductivity were experimentally determined in the frequency of 10 Hz to 8 MHz using LCR meter at room temperature. The dielectric parameters decreased with the increasing frequency and become constant at higher frequency. AC electrical conductivity was found to increase with increasing frequency. The properties of nanocomposites were improved significantly at low graphene loadings. The nanocomposite with 5 wt% graphene loading shows enhanced dielectric properties. (C) 2019 Elsevier Ltd. All rights reserved. Selection and/or Peer-review under responsibility of International conference on NanoTechnology in Energy, Nano-bio interface & Sustainable Environment (INTENSE).