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

Authors
Journal
Composites Part A Applied Science and Manufacturing
1359-835X
Publisher
Elsevier
Volume
64
Identifiers
DOI: 10.1016/j.compositesa.2014.04.023
Keywords
  • A. Polymer-Matrix Composites (Pmcs)
  • B. Mechanical Properties
  • B. Microstructures
  • E. Surface Treatments

Abstract

Abstract In this work, the effects of the as-produced GO and silane functionalized GO (silane-f-GO) loading and silane functionalization on the mechanical properties of the 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.

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