▎ 摘　　要

NOVELTY - Polymer composite material comprises polyvinyl alcohol and fluorinated graphene nano sheet in a mass ratio of 85-99:1-15. The graphene fluoride nano sheet is connected with the polyvinyl alcohol molecule by hydrogen bond action and uniformly dispersed in the polyvinyl alcohol. USE - Polymer composite material in power electronic component surface (claimed). ADVANTAGE - The composite material is biodegradable and has excellent electrical insulating performance, thermal performance and stability. The polyvinyl alcohol as the polymer body, with large doping amount of fluorinated nano graphene sheet to realize the modification, realizing the stable connection of the two by the hydrogen bond action between the graphene and polyvinylene alcohol molecules and realizing the uniform dispersion of the fluorinated graphene in the polyvinylon alcohol, at the same time, the poly vinyl alcohol takes the fluorination graphene nano-sheet as the centre for directional arrangement, increasing the crystallinity. The composite materials have good material stability and low manufacturing cost. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the method for preparing polymer composite material, which involves vacuum drying under the temperature of 60-80degrees Celsius.