Mechanical properties of epoxy composites filled with silane-functionalized graphene oxide

Yan Jun Wan, Li Xiu Gong, Long Cheng Tang, Lian Bin Wu, Jian Xiong Jiang

Research output: Contribution to journalArticle

261 Scopus citations

Abstract

In this work, the effects of as-produced GO and silane functionalized GO (silane-f-GO) loading and silane functionalization on the mechanical properties of epoxy composites are investigated and compared. Such silane functionalization containing epoxy ended-groups is found to effectively improve the compatibility between the silane-f-GO and the epoxy matrix. Increased storage modulus, glass transition temperature, thermal stability, tensile and flexural properties and fracture toughness of epoxy composites filled with the silane-f-GO sheets are observed compared with those of the neat epoxy and GO/epoxy composites. These findings confirm the improved dispersion and interfacial interaction in the composites arising from covalent bonds between the silane-f-GO and the epoxy matrix. Moreover, several possible fracture mechanisms, i.e. crack pinning/deflection, crack bridging, and matrix plastic deformation initiated by the debonding/delamination of GO sheets, were identified and evaluated.

Original languageEnglish (US)
Pages (from-to)79-89
Number of pages11
JournalComposites Part A: Applied Science and Manufacturing
Volume64
DOIs
StatePublished - Sep 2014

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Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Mechanical properties
  • B. Microstructures
  • E. Surface treatments

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials

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