▎ 摘　　要

NOVELTY - A high temperature extreme pressure wear-resistant lubricating oil comprises 80-98 wt.% base oil, 0.01-5 wt.% WS2 grafted long-chain alkyl compound graphene composite material, 1-10 wt.% friction modifier, and 0.1-5 wt.% antioxidant and silicon defoamer. The base oil is poly- alpha -olefin synthetic lubricating oil. USE - High temperature extreme pressure wear-resistant lubricating oil. ADVANTAGE - The lubricating oil has good lipophilicity, stable dispersion system, and reduced occurrence of material agglomeration. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of the lubricating oil comprising adding long chain alkyl, phase transfer catalyst and sodium hydroxide to graphene oxide aqueous solution to obtain mixed solution, adjusting pH to 9-13, reacting to 75-85 degrees C under nitrogen atmosphere, filtering using filter membrane, washing product, and vacuum drying to 55-65 degrees C to obtain long-chain alkyl-grafted graphene oxide; adding to deionized water, dispersing, adding ammonium metatungstate, oxalic acid and thiourea, dispersing for 8-15 minutes, adding to reactor, reacting naturally cooling to room temperature, centrifugally separating, washing with deionized water to obtain black product, and vacuum drying to 75-85 degrees C to obtain WS2 grafted long-chain alkyl compound graphene composite material; and adding friction modifier, antioxidant and silicon defoamer, adding to base oil, and dispersing.