▎ 摘　　要

NOVELTY - A wear-resistant self-healing material of graphene-based polymer nano-alloy comprises a graphene-containing 5-disulfanyl-1,3,4-thiadiazole-2-thiol compound (I) and a 5-disulfanyl-1,3,4-thiadiazole-2-thiol compound (II) in a molar ratio of (1-100):1. USE - Wear-resistant self-healing material of graphene-based polymer nano-alloy used for lubricating oil additives (claimed). ADVANTAGE - The wear-resistant self-healing material of graphene-based polymer nano-alloy is energy-saving, effectively prevents agglomeration and precipitation in fluid lubricating products, and has high bearing capacity, reduced size, low viscosity and high reliability. The self-healing material achieves a heavy load anti-wear effect close to the zero wear breakthrough, and economically provides ultra-high performance and protection of the engine with excellent anti-wear lubrication and metal deactivation and self repairing effect. DETAILED DESCRIPTION - A wear-resistant self-healing material of graphene-based polymer nano-alloy comprises a graphene-containing 5-disulfanyl-1,3,4-thiadiazole-2-thiol compound of formula (I) and a 5-disulfanyl-1,3,4-thiadiazole-2-thiol compound of formula (II) in a molar ratio of (1-100):1. X=graphene; Y'=Cu, Ag, Cr, Mg, Al, Zn or Mn; R=4-20C alkyl;and n=1-100. An INDEPENDENT CLAIM is included for preparation of wear-resistant self-healing material of graphene-based polymer nano-alloy, which involves obtaining oil-soluble thiadiazolylthio compound, obtaining oil-soluble nano-graphene material, adding the oil-soluble nano-graphene to the oil-soluble thiadiazolylthio compound, adding 2 ml solubilizer, 1.5 ml dispersant and 0.3 g stabilizer, reacting at 50 degrees C or less, increasing the reaction temperature to 50-80 degrees C, stirring for 5-10 hours, leaving still and defoaming to obtain a clear and transparent compound (I), obtaining an oil-soluble nano metal, adding to the oil-soluble thiadiazolylthio compound, adding 2 ml solubilizer, 1.5 ml dispersant and 0.3 g stabilizer, reacting at 50 degrees C or less, increasing the reaction temperature to 50-80 degrees C, stirring for 5-10 hours, leaving still the product and defoaming to obtain a clear and transparent compound (II) of dark green color, adding the compound (I) to the compound (II) in a molar ratio of (1-100):1, mixing at 80 degrees C, cooling, filtering and defoaming. The oil-soluble thiadiazolylthio compound is prepared by adding 1 mol reagent (i), 300-400 ml organic solvent, 300-400 ml deionized water, 1.5 ml coupling agent and 1 ml phase transfer catalyst to a four-necked flask equipped with a reflux condenser and a thermometer, mixing, stirring for 30 minutes to obtain a mixed solution, cooling to 0 degrees C, dripping 32 wt.% sodium hydroxide solution from the upper funnel to the mixed solution for 2-5 hours, stirring continuously, controlling the temperature at 20 degrees C or less, adjusting the pH to 6.5-7.5, reacting to obtain a light yellow clear and transparent liquid, adding 1.0-1.5 mol alkylthiol, stirring continuously for 1 hour under ice-water bath cooling, dripping 1.0-2.0 mol oxidant at 40 degrees C or less for 3-7 hours, carrying out oxidation reaction of alkylthiol with the reagent (i) under the action of an oxidizing agent, heating to 85 degrees C, reacting at a reflux temperature for 2-5 hours to obtain a mono-substituted compound of reagent (i), adjusting the pH of the reaction mixture to 6-9, reducing the temperature of the reaction mixture to below 20 degrees C by cold water circulation, dripping 120 ml 1 mol/L hydrochloric acid solution at 40 degrees C or less, cooling to 20-25 degrees C, leaving still, stratifying, separating the organic phase and the oil produced in the reaction mixture, adding 5 wt.% pH adjusting agent to the oil, adding deionized water, stirring at 50 degrees C for 2-5 hours, leaving still, stratifying, separating the upper organic phase, adding deionized water to the organic phase in a weight ratio of 1:(1-2), washing 2-5 times at 30-60 degrees C, adjusting the pH of the wash liquor to 7-9, obtaining a yellow transparent oily liquid, transferring to a distillation flask, heating to 120-150 degrees C, vacuum-distilling for 2-6 hours, cooling to 20 degrees C, and obtaining a yellow-brown transparent oily liquid as alkylthio compound of reagent (i) with excellent oil solubility and using as a lubricant additive. The oil-soluble nano-graphene material is prepared by carrying out electrostatic treatment of nano-graphene produced by the reduction method, uniformly dispersing in an organic amine solution, leaving still for 24 hours to obtain an organic amine solution containing nano-graphene particles, adding 5-10 wt.% industrial white oil to the organic amine solution, heating the mixture to 80-100 degrees C, vigorously stirring at 50-60 degrees C for 3 hours, carrying out three-stage ultrafine filtration, defoaming, leaving still for 12 hours, and obtaining an oil-soluble nano-graphene as micro black. The oil-soluble nano metal is obtained by carrying out electrostatic treatment of nano metal, uniformly dispersing in an organic amine solution, leaving still for 24 hours to obtain an organic amine solution containing nano metal, adding 5-10 wt.% industrial white oil to the organic amine solution, heating the mixture to 80-100 degrees C, vigorously stirring at 50-60 degrees C for 3 hours, carrying out three-stage ultrafine filtration, defoaming, leaving still for 12 hours, and obtaining an oil-soluble nano metal. The weight ratio of graphene and organic amine is 1:10. The weight ratio of deionized water and oil is 1:2. The weight ratio of nano metal and organic amine is 1:(1-10). The reagent (i) is 2,5-bis(methylthio)-1,3,4-thiadiazole compound of formula (A).