Abstract
Graphene nanoplatelets (GNP)/epoxy and multi-walled carbon nanotube (MWCNTs)/epoxy thin film composites were fabricate by ultrasonication and spin coating technique. The tensile properties of epoxy containing (0.2, 0.6 and 1 vol%) of GNP sonicated at different duration (10, 20 and 30 min) or MWCNTs sonicated at 20 min only have been studied. It was found that the addition of GNP was decrease the tensile strength and modulus. However, among all samples, GNP/epoxy produced by 20 min sonication time showed slightly higher tensile strength and modulus. The effect of sonication time was supported by morphological analysis, which showed an improvement of GNP dispersion with increased sonication time. However, GNP deformation was observed with long sonication time. Compared with MWCNTs/epoxy sonicated at 20 min at different filler loadings, GNP/epoxy shows lower tensile properties. This can attribute to the two dimensional GNP are more easier to aggregate than MWCNTs.
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