Fig. 6.
a Suspensions of phenyl isocyanate-treated graphite oxide (1 mg mL−1) and dissolved polystyrene in DMF before (left) and after (right) reduction by N, N-dimethylhydrazine. b Composite powders as obtained after coagulation in methanol. c Hot-pressed composite (0.12 vol% of graphene) and pure polystyrene of the same 0.4-mm thickness and processed in the same way. Adapted from reference [21]