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We report on the preparation of polycarbonate-based graphene (PC/G)composites, by using a simple and scalable solution blending method to dispersesingle (SLG) and few layer (FLG) graphene flakes, prepared by liquid phaseexfoliation (LPE), in the polymer matrix. A solvent-exchange process is carriedout to re-disperse the exfoliated SLG/FLG flakes in an environmentally friendlysolvent, i.e. 1,3dioxolane, which is also used to dissolve the polycarbonatepellets, thus facilitating the mixing of the polymer dispersion with theSLG/FLG flakes. The loading of SLG/FLG flakes improves the mechanical andthermal properties, as well as the electrical conductivity of the polymer,reaching a +26% improvement of the elastic modulus at 1 wt% loading, and anelectrical conductivity 10^-3 S m^-1 at 10 wt% with a percolation thresholdachieved at 0.55 vol%. The as-prepared PC/G composite with the aforementionedreinforced properties can be a promising material for 3D printing-basedapplications.

Solution blending preparation of polycarbonate/graphene composite: boosting the mechanical and electrical properties