Effects of graphene sheet size on electrical conductivity and percolation of graphene aerogel/epoxy composites

Ne Myo Han, Zhenyu Wang, Xi Shen, Ying Wu, Xu Liu, Qingbin Zheng, Jang Kyo Kim

Research output: Contribution to conferencePaperpeer-review

4 Scopus citations

Abstract

By varying the size of precursor graphene oxide (GO) sheets, unidirectional graphene aerogels (UGAs) with a wide range of density, alignment and electrical conductivity are prepared. UGAs prepared using ultralarge graphene oxide (UL-UGA) exhibit a low density, a high degree of alignment and a high electrical conductivity. Solid epoxy composites prepared by infiltrating liquid epoxy resin into the UL-UGA structure exhibit an ultralow percolation threshold of 0.0066 vol.%, and a unique anisotropic electrical conductivity. In addition to its electrical conductivity, UL-UGA is shown to be an effective toughening filler, capable of increasing the fracture toughness of epoxy by 69% at 0.11 vol.% graphene content.

Original languageBritish English
StatePublished - 2017
Event21st International Conference on Composite Materials, ICCM 2017 - Xi'an, China
Duration: 20 Aug 201725 Aug 2017

Conference

Conference21st International Conference on Composite Materials, ICCM 2017
Country/TerritoryChina
CityXi'an
Period20/08/1725/08/17

Keywords

  • Electrical conductivity
  • Fracture toughness
  • Graphene aerogel
  • Percolation
  • Sheet size

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