A comparison of the micromechanics of graphene- and transition metal dichalcogenide-nanocomposites

Fang Wang, Mark Bissett, Daniel Wolverson, Reshef Tenne, Robert J. Young, Ian A. Kinloch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We have previously studied the micromechanics of graphene composites by using Raman spectroscopy to map the strain in model composite systems comprising of single graphene flakes. The design rules derived from these models have then been applied successfully to bulk composites. Herein, we have adapted our approach to understand the behaviour of transition metal transition metal dichalcogenide (TMDC) reinforcements such as tungsten disulphide (WS2) and molybdenum disulphide (MoS2). Few-layer nanoplatelets were produced by mechanical exfoliation, applied to a polymer substrate and then put under uniaxial strain. Small but significant Raman band shifts were observed upon deformation. These strain-induced bands shifts were modeled using density functional perturbation theory with good correlation between the experimental and predicted band shifts. The micromechanical behaviour of these experimental systems were modeled and compared to that of graphene, with the differences being correlated nature of the interfaces and microstructures. Finally, composites were produced using WS2 nanotubes in order to assess the role of the dimensionality of the reinforcement in the mechanical performance.

Original languageEnglish
Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
PublisherEuropean Society for Composite Materials
ISBN (Electronic)9783000533877
Publication statusPublished - 2016
Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
Duration: 26 Jun 201630 Jun 2016

Conference

Conference17th European Conference on Composite Materials, ECCM 2016
CountryGermany
CityMunich
Period26/06/1630/06/16

Keywords

  • Graphene
  • Micromechanics
  • Nanocomposites
  • Raman spectroscopy
  • TMDCs

ASJC Scopus subject areas

  • Ceramics and Composites

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