Fully leveraging the outstanding mechanical, thermal, and electrical properties of nanocarbon fillers in polymer nanocomposites remains a formidable challenge for material scientists. Advances in the mass production of GNPs are unlocking larger lateral size and higher aspect ratio flakes. However, without surface modification, their inert carbon surface will continue to be prone to agglomeration, poor dispersion, and a weak interphase. In this study we aim to link changes in GNP surface chemistry, with their dispersion and morphology in an epoxy matrix, and subsequently their multifunctional properties.