Exceptional dielectric properties of self-aligned in-situ reduced graphene oxide/epoxy nanocomposites

Nariman Yousefi, Xiuyi Lin, Xi Shen, Jingjing Jia, Jang Kyo Kim

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

Abstract

The electrical conductivities, dielectric properties and electromagnetic shielding efficiency of graphene oxide (GO)/epoxy nanocomposites are studied. Composites containing self-aligned reduced GO (rGO) sheets are fabricated using an all aqueous method. The aligned graphene nanocomposites display significant anisotropy in properties measured in the directions of alignment and perpendicular to it. The rGO/epoxy nanocomposites present a very low percolation threshold of 0.26 wt% as a result of fine dispersion of monolayer rGO sheets and their ultralarge size. The composites exhibit exceptionally high dielectric constants depending on the graphene content due to the charge accumulation at the highly conductive filler/insulating polymer interface according to the polarization principle. The highly dielectric nanocomposites can function as effective electromagnetic interference (EMI) shielding materials.

Original languageEnglish
Title of host publication16th European Conference on Composite Materials, ECCM 2014
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Electronic)9780000000002
Publication statusPublished - Jun 2014
Externally publishedYes
Event16th European Conference on Composite Materials, ECCM 2014 - Seville, Spain
Duration: 22 Jun 201426 Jun 2014

Publication series

Name16th European Conference on Composite Materials, ECCM 2014

Conference

Conference16th European Conference on Composite Materials, ECCM 2014
Country/TerritorySpain
CitySeville
Period22/06/1426/06/14

Keywords

  • Dielectric properties
  • Epoxy
  • Graphene
  • Nanocomposites
  • Self-alignment

ASJC Scopus subject areas

  • Ceramics and Composites

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