Preparation, characterization, and supercritical carbon dioxide foaming of polystyrene/graphene oxide composites

▶ Isocyanate-graphene oxide (GO) is well dispersed in dimethylformamide. ▶ The GO was well dispersed in the polystyrene matrix by solution blending. ▶ Significantly improved mechanical and thermal properties were existed. ▶ The composites were applied to supercritical fluid carbon dioxide foaming. ▶ An outstanding heterogeneous nucleation effect of GO was presented.