▎ 摘　　要

NOVELTY - The preparation method of a superhydrophobic rigid carbon film involves dispersing graphene in an organic solvent and then stirring, adding 4,4'-diphenylether diamine and pyromellitic dianhydride to the mixture and then stirring, polymerizing the mixture to obtain a graphene/polyamide acid solution and then heating at 50-180 degrees C for 1-24 hours, removing organic solvent to obtain a graphene/polyimide precursor thin film and then heat treating under vacuum or inert gas atmosphere to obtain a carbon nanorod array of graphene/carbon composite film, and plasma processing. USE - The method is useful for preparation of superhydrophobic rigid carbon film, which is useful in detergent industry, and microfluidic system, bio and other applications. ADVANTAGE - The method enables simple preparation of rigid carbon film with excellent superhydrophobic properties, mechanical properties and uniform thickness and controlled shape. DETAILED DESCRIPTION - The preparation method of a superhydrophobic rigid carbon film involves dispersing graphene in an organic solvent, uniformly mixing, stirring the mixture at room temperature and then ultrasonically dispersing to obtain a dispersion liquid, adding 4,4'-diphenylether diamine and pyromellitic dianhydride to the dispersion liquid and then stirring, polymerizing the mixture to obtain a graphene/polyamide acid solution and then heating at 50-180 degrees C for 1-24 hours, removing organic solvent, again heating the mixture at 180-350 degrees C for 1-24 hours under vacuum or inert gas atmosphere to obtain a graphene/polyimide precursor thin film and then heat treating under vacuum or inert gas atmosphere to obtain a carbon nanorod array of graphene/carbon composite film, and plasma processing using fluorine-containing silane toluene solution.