A variety of functionalisation strategies have been proposed. Oxidation can promote esterification, forming covalent bonds between carboxylic acids on the filler and epoxies on the polymer . While other oxygen groups, such as hydroxyls and carbonyls, better interact with the matrix through non-covalent hydrogen bonding. Fluorination can result in amino functionalisation, through the substitution of reactive fluorine atoms by N-alkylidene amino groups in the hardener . While direct amination enables nucleophilic attack from the nitrogen moieties onto epoxide groups . These schemes were developed on CNTs, and later applied to GNP epoxy nanocomposites as summarised in Table . The larger aspect ratio of a graphene sheet's geometry relative to 0D or 1D nanocarbons, and graphene manufacturer's capability to mass produce high lateral size (tens of microns) multi-layer flakes, has made GNPs attractive particulate fillers for industrial polymer nanocomposite applications . However, there is still scope for structured analysis of the multifunctional effects of different GNP surface chemistries.