The focus of this study was to investigate the effect of carboxylic acid(COOH)functionalized graphene(CGr)content on abrasive wear behavior of epoxy nanocomposites.CGr-reinforced epoxy(CGr//Ep)nanocomposites were fabricated using probe sonicator for dispersion and vacuum oven for curing.The percentage of CGr in the developed composites was varied from 0.2 to 1 wt.% with an increament of 0.2 wt.%.The abrasive wear tests were conducted on the developed CGr/Ep composites on SiC abrasive paper with two grit sizes at constant velocity and constant load for varying abrading distance.The worn surfaces were analyzed using Scanning Electron Microscope and the images reveals that the developes nanocomposites exhibits good tribolofical performance at low filler loading(<0.6 wt.%).Neat epoxy showed the highest specific wear rate as well as high wear volume.On the other hand,epoxy with 0.6 wt.% of CGr exhibited the least friction coefficient and superior wear resistance for 320 grit SiC abrasive paper.It is predicted that the good interfacial adhesion between CGr and epoxy matrix and also tribo-chemical reactions between CGr layer and epoxy matrix for reducing wear rate of the composite materials.
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