▎ 摘　　要

NOVELTY - Hydrophilic graphene is prepared by forming graphite oxide, dispersing in water, obtaining graphene oxide dispersion, adding iron, filtering and drying solid. Molybdenum disulfide nanotubes are prepared using hexacarbonylmolybdenum(0). Hydrophilic molybdenum disulfide nanotubes are prepared using molybdenum disulfide nanotubes. Hydrophilic graphene and hydrophilic molybdenum disulfide nanotube are added to ultrapure water, ultrasonically dispersed, stirred, centrifuged and precipitate is dried under vacuum, to obtain aqueous graphene-molybdenum disulfide nanotube lubricant additive. USE - Preparation of aqueous graphene-molybdenum disulfide nanotube lubricant additive (claimed). ADVANTAGE - The method enables preparation of environmentally-friendly aqueous graphene-molybdenum disulfide nanotube lubricant additive having excellent lubricating property and stability. DETAILED DESCRIPTION - Hydrophilic graphene is prepared by forming graphite oxide from natural graphite flakes by Hummers method, dispersing 20 mg graphite oxide in 30-50ml water, ultrasonically treating, obtaining graphene oxide dispersion, adjusting pH of the dispersion to 9-10 by adding 20-25 %mass aqueous ammonia, heating at 100 degrees C, adding 40-50 mg iron, continuing heating, maintaining at 100 degrees C, stirring at reflux for 1.5 hours, cooling, removing unreacted iron with a magnet, obtaining graphene dispersion, vacuum filtering dispersion using porous membrane, washing resultant solid 3 times with water and drying at 60 degrees C under vacuum conditions. Molybdenum disulfide nanotubes are prepared by adding 400 mg hexacarbonylmolybdenum(0) to glove box, transferring out hexacarbonylmolybdenum(0) from glove box to corundum boat under argon protection, mixing hexacarbonylmolybdenum(0) with 800 mg iodine, placing corundum boat in glass tube having inner diameter of 15 mm and three horizontal tube furnace zones, passing argon for 30 minutes, heating at a rate of 10 degrees C/minute at 550 degrees C, heating three horizontal tube furnace at a rate of 10 degrees C/minute at 550 degrees C, transferring corundum boat to the center of reaction tube, passing hydrogen sulfide gas for 1 hour, reducing temperature of furnace at room temperature at a rate of 10 degrees C/minute and scraping off products from outer wall and inner wall of tube using clean spatula. Then, hydrophilic molybdenum disulfide nanotubes are prepared by dispersing 5 mg molybdenum disulfide nanotubes in 2 ml chloroform, obtaining uniform colloidal dispersion, adding dispersion to 8-10 ml cetyltrimethylammonium bromide solution having concentration of 3.64 g/ml, performing ultrasonic oscillation, obtaining stable milky white liquid, heating obtained liquid at 80 degrees C, obtaining transparent solution by vigorously stirring, cooling, removing residual surfactant by centrifuging and obtaining precipitate as hydrophilic molybdenum disulfide nanotubes. The hydrophilic graphene and hydrophilic molybdenum disulfide nanotubes are added to ultrapure water such that the mass ratio of hydrophilic graphene and hydrophilic molybdenum disulfide nanotubes is 0.5-2:1, ultrasonically dispersed for 1-2 hours, stirred at room temperature under dark conditions for 24 hours, subjected to centrifugal separation and obtained precipitate is dried under vacuum at 60 degrees C for 48 hours, to obtain aqueous graphene-molybdenum disulfide nanotube lubricant additive.