▎ 摘　　要

NOVELTY - Electrochromatic material preparation involves dispersing carboxyl group graphene in dimethyl formamide in water bath under ultrasonic dispersion in protection of an inert gas for 1 hour at 50 degrees C. The resultin mixture is heated with toluene diisocyanate for 24 hours to remove isocyanate groups. The removed isocyanate groups are modified with graphene, 4-amino-6-hydroxy-2-methylpyrimidine and triethyl acetate in dimethylformamide to give 2-ureido-4(1H)-pyrimidinone. USE - Method for preparing electrochromatic material (claimed). ADVANTAGE - The method prepares electrochromatic material in a simple manner with increased dispersing and electrochromic properties, and large surface area. DETAILED DESCRIPTION - Electrochromatic material preparation involves dispersing carboxyl group graphene in dimethyl formamide in water bath under ultrasonic dispersion in protection of an inert gas for 1 hour at 50 degrees C. The resulting mixture is heated with toluene diisocyanate for 24 hours to remove isocyanate groups. The removed isocyanate groups are modified with graphene, 4-amino-6-hydroxy-2-methylpyrimidine and triethyl acetate in dimethylformamide to give 2-ureido-4(1H)-pyrimidinone. The formed mixture is heated at 100 degrees C under ultrasonic agitation for 20 hours, and then dried to obtain hydrogen bonded graphene dispersion solution.