▎ 摘　　要

NOVELTY - Preparing graphene oxide material with high heat radiation coefficient and electromagnetic shielding comprises (i) uniformly stirring the graphene oxide slurry; (ii) performing vacuum freeze drying treatment to the uniformly stirred graphene oxide slurry; (iii) carrying out hydrazine hydrate reduction treatment to the material after vacuum freezing and drying treatment; (iv) carrying out high temperature graphitization treatment to the material after the hydrazine hydrate reduction treatment; (v) carrying out vacuum cold pressing treatment to the sample after high temperature graphitization treatment; (vi) processing the coldpressed graphene sample with a machining center; (vii) grinding the surface of the graphene plate by mechanical flat grinding; (viii) preheating the graphene plate by a heating table; (ix) uniformly spraying the heat radiation coating to the surface of the graphene plate; and (x) solidifying the sprayed graphene plate. USE - The method is useful for preparing graphene oxide material with high heat radiation coefficient and electromagnetic shielding. ADVANTAGE - The method solves the current problem of poor heat radiation effect and electromagnetic shielding effect of composite materials. DETAILED DESCRIPTION - Preparing graphene oxide material with high heat radiation coefficient and high electromagnetic shielding comprises (i) uniformly stirring the graphene oxide slurry; (ii) performing vacuum freeze drying treatment to the uniformly stirred graphene oxide slurry; (iii) carrying out hydrazine hydrate reduction treatment to the material after vacuum freezing and drying treatment; (iv) carrying out high temperature graphitization treatment to the material after the hydrazine hydrate reduction treatment; (v) carrying out vacuum cold pressing treatment to the sample after high temperature graphitization treatment; (vi) processing the coldpressed graphene sample with a machining center; (vii) grinding the surface of the graphene plate by mechanical flat grinding; (viii) preheating the graphene plate by a heating table; (ix) uniformly spraying the heat radiation coating to the surface of the graphene plate, where the heat radiation coating comprises zirconium dioxide, ferric oxide, chromium oxide and graphene powder according to ratio of 2:1:2:5-6; and (x) solidifying the sprayed graphene plate.