▎ 摘　　要

NOVELTY - Preparation of protective coating material involves mixing dimethylformamide and hexamethylene diisocyanate, adding graphene oxide suspension, stirring, washing to obtain grafted graphene oxide-hexamethylene diisocyanate product, adding grafted product, anhydrous dimethylformamide and polyaspartate into container, dispersing, stirring, centrifuging, washing, vacuum-drying to obtain modified graphene oxide grafted product, reacting 1-thioglycerol, 2,2-dimethoxy-2-phenylacetophenone and trifluorofluorooctyl methacrylate, washing with saturated sodium chloride solution and distilled water, evaporating to obtain dihydroxylated fluoropolymer, applying alpha -aminopropyltriethoxysilane-ethanol aqueous solution on treated iron sheet, drying, adding polyaspartate, hexamethylene diisocyanate trimer, dihydroxylated fluoropolymer and modified graphene oxide grafted product into container, mixing, adding dimethylformamide and toluene, dispersing, applying it on coated iron sheet and drying. USE - Preparation of protective coating material (claimed) for offshore wind turbine blades. ADVANTAGE - The prepared hydrophobic polyurea/graphene oxide protective coating material has excellent hydrophobic performance, anti-corrosion resistance, low volatile organic compounds emissions, and high static water contact angle of up to 151.7 degrees . DETAILED DESCRIPTION - Preparation of protective coating material involves preparing graphene oxide by mixing graphite flake with N,N-dimethylformamide in ratio of 1 g:100 mL to obtain graphene oxide, ultrasonically dispersing at room temperature to obtain graphene oxide suspension which is dark brown suspension, mixing dimethylformamide and hexamethylene diisocyanate in ratio of 1 g:100 mL, adding graphene oxide suspension, stirring at 60 degrees C, centrifugally separating lower precipitate, washing with anhydrous dimethylformamide to obtain grafted graphene oxide-hexamethylene diisocyanate product, adding 1 g grafted product, 100 mL anhydrous dimethylformamide and 0.3 g polyaspartate into container, ultrasonically dispersing at room temperature, magnetically stirring at 40 degrees C, centrifuging, washing with anhydrous dimethylformamide, vacuum-drying to obtain modified graphene oxide grafted product, adding 1 mol 1-thioglycerol, 0.05 mol 2,2-dimethoxy-2-phenylacetophenone photoinitiator and 1.1 mol trifluorofluorooctyl methacrylate to container, reacting under UV irradiation, washing with saturated sodium chloride solution and distilled water in order, evaporating, vacuum-drying to obtain dihydroxylated fluoropolymer as hydrophobic monomer, using 1200 mesh sandpaper to polish a Q235 iron sheet, soaking iron sheet in sodium hydroxide solution to remove grease on the surface of the iron sheet, removing, washing with deionized water, drying to obtain treated iron sheet, preparing alpha -aminopropyltriethoxysilane-ethanol aqueous solution, applying alpha -aminopropyltriethoxysilane-ethanol aqueous solution on treated iron sheet, drying, adding polyaspartate, hexamethylene diisocyanate trimer, dihydroxylated fluoropolymer and modified graphene oxide grafted product into container, mixing, adding dimethylformamide and toluene, ultrasonically dispersing, applying it on coated iron sheet, leaving still at 90 degrees C, cooling to room temperature and air drying to obtain hydrophobic polyurea/graphene oxide protective coating material.