▎ 摘　　要

NOVELTY - Method for preparing nanocoating materials, involves (a) preparing oxidized graphene by mixing oxidized graphene into deionized water, uniformly stirring and dispersing the mixture, adding hydrazine hydrate, reacting mixture, adding condensing agent and 3-aminopropyltriethoxysilane and subjecting mixture to ultrasonic dispersion, (b) mixing e.g. toluene diisocyanate and polyoxypropylene glycol, adding 3-aminopropyltriethoxysilane and stirring mixture, and (c) dispersing oxidized graphene nanopowder and adding the mixture obtained in the step (b) in deionized water. USE - The method is useful for preparing nanocoating materials (claimed). ADVANTAGE - The method prepares nanocoating materials which has excellent conductivity and stability, and is simple and cost-effective. DETAILED DESCRIPTION - Method for preparing nanocoating materials, involves (a) preparing oxidized graphene by Hummers method by mixing oxidized graphene into deionized water, uniformly stirring and dispersing the mixture, adding hydrazine hydrate, reacting the mixture at 50-80 degrees C for 2-5 hours, adding condensing agent and 3-aminopropyltriethoxysilane, subjecting the mixture to ultrasonic dispersion and stirring the mixture at 80-100 degrees C for 12-20 hours, (b) mixing toluene diisocyanate, polyoxypropylene glycol, diethylene glycol, trimethylolpropane and dimethylol propionic acid, stirring the mixture for 20-30 hours, adding 3-aminopropyltriethoxysilane and stirring the mixture at 60-80 degrees C for 8-16 hours to obtain 3-aminopropyltriethoxysilane-terminated aqueous polyurethane, and (c) dispersing modified graphene nanopowder in deionized water, subjecting the mixture to ultrasonic dispersion, adding 3-aminopropyltriethoxysilane-terminated aqueous polyurethane and adjusting pH of the mixture to 7.5-8.5.