▎ 摘　　要

NOVELTY - Preparing compact flexible graphene/polystyrene composite heat conducting film comprises (i) drying the graphene oxide powder at a certain temperature, and sieving; (ii) adding the specified amount of graphene oxide powder, styrene and zirconium ball into the grinding machine, fully grinding for a certain time to obtain the graphene oxide dispersion liquid, where the ratio of graphene added in styrene ranges from 0.1-6 wt.%; (iii) coating the graphene oxide styrene dispersion liquid into a film with thickness of 1-3 mm, and ventilating and drying at room temperature for a certain time to obtain the graphene oxide/polystyrene composite film; and (iv) placing the graphene oxide/polystyrene composite film in the step (iii) under the environment of inert protective gas, after being treated at a high temperature of 2500-3000 degrees C for a certain period of time. USE - The method is useful for preparing compact flexible graphene/polystyrene composite heat conducting film. ADVANTAGE - The method is simple. The film has good flexibility, complete structure, high strength and large heat conductivity coefficient.