▎ 摘　　要

NOVELTY - Aramid nanofiber coated graphite nanocomposite film comprises aramid nanofibers coated with graphite nanosheets. A layered ordered nanocomposite film formed by stacking layers. The outstanding insulation performance is expressed as a volume resistivity exceeding 1010Ω.cm, USE - The composite film is useful in field of nano-fluid ion transmission, osmotic energy conversion, battery diaphragm and electric device radiating. Can also be used in oxidized graphene, nano clay, transition metal carbide and nitride graphene composite nano-cellulose laminated nano-film. ADVANTAGE - The composite film can maintain structural integrity and stable mechanical properties after soaking in water for a long time and maintain stable ion acceleration transmission performance after soaking in aqueous solution for a long time, maintains structural integrity and stable ion accelerated transport performance in extreme environments, can realize accelerated ion transport in extreme environments, namely acids, alkalis and organic solvents, and has outstanding insulation and thermal conductivity, and can reach thermal conductivity of 41.5W/m.K. The method is simple to operate, and overcomes the problems of complex preparation process of traditional nanosheets and the need for secondary functionalization to disperse. The film has excellent structural stability, long-term ion accelerated transport stability and excellent extreme environmental adaptability, and outstanding insulation and thermal conductivity properties. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a method for preparing aramid nanofiber coated graphite nanocomposite film comprising adding aramid nanofibers and graphite sheets to a solvent to form a mixed solution, and then mechanically treating, stripping the aramid nanofibers and disperse the graphite sheets with the assistance of mechanical force, coating aramid nanofibers on the surface of graphite nanosheets through hydrogen bonds and π-π bonds due to the repulsion of negative charges on the surface, forming a homogeneous and stable aramid nanofiber-coated graphite suspension, heating and stirring the suspension at a high temperature to concentrate its concentration, and finally scraping and hot pressing to obtain the aramid nanofiber-coated graphite nanocomposite film.