EFFECTS OF GRAPHENE NANOPLATELETS AT LOW FILLER CONTENT ON TENSILE AND FRACTURE TOUGHNESS PROPERTIES OF F-GNP/EPOXY NANOCOMPOSITES
Keywords:
PALF fiber, , Mechanical properties, Dynamic Analysis, FTIR, Water absorptionAbstract
This paper aims at effects of graphene nanoplatelets at low filler content on tensile and fracture toughness properties of plasma functionalized graphene nanoplatelets f-GNP/epoxy nanocomposites. Various mechanical tests were performed on a series of f-GNP/epoxy at low nanofiller loading to assess the effect of the nanofiller on mechanical properties. Most importantly, a significant enhancement in fracture toughness is achieved without compromising the tensile and thermal properties of the nanocomposites. The fracture toughness of neat epoxy resin was increased by over 50 % with the incorporation of 0.25 wt% f-GNP loading, obtaining a value of 245 , while the neat epoxy indicated a value of 162 . The glass transition temperature and coefficient of thermal expansion (CTE) both showed a slight increase of 3 % and 2 %, respectively, both at 1 wt. % f-GNP loading. These enhancements are competitive with current literature results on nanocomposites, but at significantly lower filler content. We therefore demonstrated that f-GNPs are capable of providing effective toughening of epoxy resins, while maintaining other tensile and thermal properties.
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