▎ 摘　　要

NOVELTY - Composite material comprises graphene coated on hole wall of the polymer foam, which forms three-dimensional continuous network structure. USE - Composite material. ADVANTAGE - The composite material has suppleness, thermal conductivity is greater than 90%, where continuous network structure of graphene is good for rapid conduction of heat flow. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for preparing composite material which involves: (A) preparing an aqueous dispersion of graphene oxide followed by freeze drying to obtain graphene oxide powder; (B) adding the graphene oxide powder to deionized water, and keeping at 50-150 Watt power for 5-30 minutes for obtaining mass fraction of 0.05-2% aqueous dispersion of graphene oxide; (C) selecting polymeric foam and soaking in mass fractions of 1-5% dilute hydrochloric acid for 5-30 minutes, after washing with water repeatedly, and drying to cut the desired shape and size; and (D) immersing the polymer foam in aqueous dispersion of graphene oxide, and the re-pressing the polymer foam to graphene oxide aqueous dispersion for uniformly adsorbed in the pores and keeping at 90-120 degrees C the reaction for 1-24 hours, and cooling to room temperature and drying for obtaining composite material.