▎ 摘　　要

NOVELTY - Method for preparing graphene phase change composite material by (i) immersing the substrate in graphene oxide solution, attaching the graphene oxide to the fiber surface of the substrate to obtain graphene oxide-coated substrate, taking out the substrate and drying, (ii) ablating the obtained substrate impregnated with graphene oxides, (iii) subjecting hollow graphene oxide fiber to high-temperature reduction at 900-1050 degrees C for 10-30 minutes to obtain the hollow graphene fiber, (iv) heating the phase change material to a molten state, and then placing the hollow graphene fiber into the molten phase change material, so that the phase change material is immersed in the hollow graphene fiber and (v) after taking out the graphite fiber impregnated with the phase change material, recrystallizing the phase change material in a molten state at normal temperature inside the hollow graphene oxide fiber to obtain graphene phase change composite material. USE - Method for preparing graphene phase change composite material. DETAILED DESCRIPTION - Method for preparing graphene phase change composite material by (i) immersing the substrate in the graphene oxide solution having concentration of 1-50 mg/ml for 10-120 minutes, attaching the graphene oxide to the fiber surface of the substrate to obtain graphene oxide-coated substrate, taking out the substrate and drying to obtain substrate impregnated with graphene oxide, (ii) ablating the substrate impregnated with graphene oxide at 300-500 degrees C for 30-60 minutes, where the environment is an air atmosphere, and ablating the substrate to obtain hollow graphene oxide fibers, (iii) subjecting hollow graphene oxide fiber to high-temperature reduction at 900-1050 degrees C for 10-30 minutes to obtain the hollow graphene fiber, (iv) heating the phase change material to a molten state, and then placing the hollow graphene fiber into the molten phase change material, so that the phase change material is immersed in the hollow graphene fiber and (v) after taking out the graphite fiber impregnated with the phase change material, recrystallizing the phase change material in a molten state at normal temperature inside the hollow graphene oxide fiber to obtain graphene phase change composite material.