Modeling and experimentation of multi-layered nanostructured graphene-epoxy nanocomposites for enhanced thermal and mechanical properties

Atif, Rasheed, Shyha, Islam and Inam, Fawad (2017) Modeling and experimentation of multi-layered nanostructured graphene-epoxy nanocomposites for enhanced thermal and mechanical properties. Journal of Composite Materials, 51 (2). pp. 209-220. ISSN 0021-9983

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Official URL: http://dx.doi.org/10.1177/0021998316640060

Abstract

The influence of multi-layered nanostructured graphene as reinforcement on thermal and mechanical properties of epoxy-based nanocomposites has been studied. The maximum improvement in mechanical properties was observed at 0.1 wt%. The Young’s and flexural moduli increased from 610 MPa to 766 MPa (26% increase) and 598.3 MPa to 732.8 MPa (23% increase), respectively. The tensile and flexural strengths increased from 46 MPa to 65 MPa (43% increase) and 74 MPa to 111 MPa (49% increase), respectively. The mode-1 fracture toughness (K1C) and critical strain energy release rate (G1C) increased from 0.85 MPa.m1/2 to 1.2 MPa.m1/2 (41% increase) and from 631 J/m2 to 685 J/m2 (9% increase), respectively. The increase in fracture toughness is attributed to the obstruction of cracks by graphene layers. The reinforcing effect of nanostructured graphene was also manifested in dynamic mechanical properties. The storage modulus and alpha-relaxation temperature values significantly increased indicating the fine integration of NSG in epoxy chains. The thermal properties of nanocomposites were simulated which showed that graphene is very efficient in significantly increasing the scattering and dissipation of thermal flux.

Item Type: Article
Uncontrolled Keywords: Epoxy, nanostructured graphene, nanocomposite, thermal conductivity, mechanical properties
Subjects: F100 Chemistry
F200 Materials Science
F300 Physics
H100 General Engineering
H300 Mechanical Engineering
H900 Others in Engineering
J400 Polymers and Textiles
J500 Materials Technology not otherwise specified
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Fawad Inam
Date Deposited: 11 Apr 2016 13:53
Last Modified: 06 Jan 2017 11:35
URI: http://nrl.northumbria.ac.uk/id/eprint/26527

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