Influence of macro-topography on damage tolerance and fracture toughness of 0.1 wt % multi-layer graphene/clay-epoxy nanocomposites

Atif, Rasheed and Inam, Fawad (2016) Influence of macro-topography on damage tolerance and fracture toughness of 0.1 wt % multi-layer graphene/clay-epoxy nanocomposites. Polymers, 8 (7). p. 239. ISSN 2073-4360

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Official URL: http://dx.doi.org/10.3390/polym8070239

Abstract

Influence of topographical features on mechanical properties of 0.1 wt % Multi-Layer Graphene (MLG)/clay-epoxy nanocomposites has been studied. Three different compositions were made: (1) 0.1 wt % MLG-EP; (2) 0.1 wt % clay-EP and (3) 0.05 wt % MLG-0.05 wt % clay-EP. The objective of making hybrid nanocomposites was to determine whether synergistic effects are prominent at low weight fraction of 0.1 wt % causing an improvement in mechanical properties. The topographical features studied include waviness (Wa), roughness average (Ra), root mean square value (Rq) and maximum roughness height (Rmax or Rz). The Rz of as-cast 0.1 wt % MLG-EP, clay-EP and 0.05 wt % MLG-0.05 wt % clay-EP nanocomposites were 43.52, 48.43 and 41.8 µm respectively. A decrease in Rz values was observed by treating the samples with velvet cloth and abrasive paper 1200P while increased by treating with abrasive papers 320P and 60P. A weight loss of up to 16% was observed in samples after the treatment with the abrasive papers. It was observed that MLG is more effective in improving the mechanical properties of epoxy than nanoclay. In addition, no significant improvement in mechanical properties was observed in hybrid nanocomposites indicating that 0.1 wt % is not sufficient to generate conspicuous synergistic effects.

Item Type: Article
Uncontrolled Keywords: topography; mechanical properties; fracture toughness; 0.1 wt % MLG/clay-epoxy nanocomposites; dynamic mechanical properties
Subjects: F200 Materials Science
F300 Physics
H300 Mechanical Engineering
J400 Polymers and Textiles
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Related URLs:
Depositing User: Fawad Inam
Date Deposited: 01 Jul 2016 14:33
Last Modified: 12 Jul 2017 03:59
URI: http://nrl.northumbria.ac.uk/id/eprint/27209

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