Processing and properties of self-aligned graphene/epoxy nanocomposites

Nariman Yousefi, Qingbin Zheng, Xiuyi Lin, Kan Kan Yeung, Jang Kyo Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The mechanical, thermal and electrical properties of epoxy/graphene oxide (GO) composites are studied. GO aqueous dispersion is introduced to waterborne epoxy latex and the GO sheets are chemically reduced before curing to produce composites. The epoxy latex particles not only form a continuous matrix but also stabilize the hydrophobic reduced GO (rGO). The chemical reduction improves the mechanical and thermal properties of the nanocomposites by facilitating the interaction between polymer molecules and graphene sheets. The monolayer graphene sheets with a high aspect ratio self-align into a layered structure above a critical concentration thanks to the low viscosity of aqueous dispersion and a long processing time. The aligned graphene nanocomposites display significant anisotropy where the steady-state electrical conductivity along the in-plane direction is three orders of magnitude higher than that of the perpendicular direction. The origins and the practical implications of the self-aligned layered structure of nanocomposites are discussed.

Original languageBritish English
Title of host publicationECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
StatePublished - 2012
Event15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, Italy
Duration: 24 Jun 201228 Jun 2012

Publication series

NameECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials

Conference

Conference15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
Country/TerritoryItaly
CityVenice
Period24/06/1228/06/12

Keywords

  • Epoxy
  • Graphene
  • Nanocomposites
  • Self-alignment

Fingerprint

Dive into the research topics of 'Processing and properties of self-aligned graphene/epoxy nanocomposites'. Together they form a unique fingerprint.

Cite this