▎ 摘　　要

NOVELTY - Preparing graphene composite material involves adding 7-15 pts. wt. graphene/potassium borate grafted dithiophosphoric acid and 35-50 pts. wt. petroleum ether in the ultrasonic oscillator, performing ultrasonic vibration treatment for 20-45 minutes, taking out and putting into a centrifuge, carrying out centrifugation, removing the mixed solution of oleic acid and petroleum ether in the upper layer, and drying to obtain a graphene composite material. USE - Method for preparing graphene composite material used for lubricating oil, where the lubricating oil is Great Wall anti-wear hydraulic oil or aviation lubricating oil or Silver Mobil engine oil or Great Wall heavy duty gear oil (claimed). ADVANTAGE - The method transferring the graphene with a large specific surface area, covered and attached to the surface of the friction pair, and effectively reducing the direct contact of the friction pair, and when some graphene sheets are broken due to deformation, potassium borate nanoparticles are exposed and released, and these released nanoparticles make up for the exposed friction surface of graphene sheets, and continuing to improve the durability of the deposited film, and under the synergistic effect of potassium borate and graphene, the grooves on the friction surface are quickly repaired, which reduces wear and improves bearing capacity, and the friction coefficient of the graphene/potassium borate composite material is added to the lubricating oil, the friction coefficient is 0.115, and the tribological performance is better.