▎ 摘　　要

NOVELTY - Preparation of hyper-regular graphene-based grease comprises oxidizing graphite powder with concentrated sulfuric acid and potassium permanganate; placing mixed solution in constant temperature water bath for heat preservation, and electromagnetically stirring; adding deionized water to mixed solution, subjecting mixed liquid to heat preservation treatment, electromagnetic stirring, adding hydrogen peroxide aqueous solution, and keeping; adding strong alkali aqueous solution; performing suction filtration treatment on mixed solution, performing high-temperature thermal reduction treatment, and carrying out high-temperature thermal reduction; acid washing, water washing, and drying; using organic solvent to dissolve graphene powder to obtain first mixture; mechanically stirring, subjecting to ultrasonic homogenization treatment, placing emulsion in constant temperature water bath for electromagnetic stirring, and electromagnetic stirring; and cooling and grinding. USE - The method is used for preparing hyper-regular graphene-based grease for engineering machinery, aviation and aerospace, passenger vehicle and military equipment. ADVANTAGE - The method uses dissolving-evaporation-macroscopical dispersing-micro-uniform manner to disperse super-regular graphene sheet into base lubricating grease. DETAILED DESCRIPTION - Preparation of hyper-regular graphene-based grease comprises in low temperature water bath of 35 degrees C, using graphite powder as raw material, and oxidizing graphite powder with concentrated sulfuric acid and potassium permanganate where particle size of graphite powder is 1000-1800 mesh, mass ratio of graphite powder, concentrated sulfuric acid and potassium permanganate is 1:30-50:3-5 and holding time is 20-30 minutes; placing mixed solution in constant temperature water bath for heat preservation, and electromagnetically stirring; adding deionized water to mixed solution where mass ratio of added deionized water to graphite powder is 120-150:1 until no bubbles are generated and mixed solution turns dark purple, subjecting mixed liquid to heat preservation treatment in constant temperature water bath of 40-60 degrees C for 60-80 minutes, electromagnetic stirring, adding 30-40 wt.% hydrogen peroxide aqueous solution dropwise with dropping rate of 0.5 0.8 ml/second until mixture completely turns golden yellow, and keeping for 10-20 minutes; after heat preservation treatment in golden yellow mixed liquid, adding strong alkali aqueous solution dropwise until mixed liquid is alkaline; performing suction filtration treatment on mixed solution, performing high-temperature thermal reduction treatment on obtained filter cake, and carrying out high-temperature thermal reduction at 150-200 degrees C where high-temperature reduction time is 4-7 hours; subjecting to multiple acid washing, water washing, and drying, where acid washing solvent is dilute hydrochloric acid aqueous solution with concentration of 5-10 wt.% and washing solvent is high-purity water, drying at 50-60 degrees C for 3-4 hours, subjecting hyper-regular graphene to ball milling treatment, and ball milling at 400-600 revolutions/minute for 2-3 hours; using organic solvent to dissolve graphene powder to obtain first mixture, where mass ratio of organic solvent to graphene powder is 8-10:1; mechanically stirring until there is no lumped grease to obtain emulsion containing super-regular graphene, subjecting to ultrasonic homogenization treatment at 400-600 W for 2 hours, placing emulsion in constant temperature water bath for electromagnetic stirring, setting temperature of constant temperature water bath at 35-45 degrees C, and electromagnetic stirring for 4 hours until grease returns to semi-solid state; and cooling to room temperature, and performing grinding treatments.