▎ 摘　　要

NOVELTY - An additive comprises functional graphene oxide, modified molybdenum sulfide and montmorillonite in a mass ratio of 4:1-16:2-32. USE - Additive used in lubricating oil such as Kunlun Tianhao F5000 lubricating oil, SF15W-40 lubricating oil and Great Wall SJ10W-40 lubricating oil, mineral base oil, and synthetic base oil (all claimed). ADVANTAGE - The tribological performance test of additive can significantly reduce the friction coefficient with a very small amount of addition, and has an excellent antifriction and antiwear property. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) preparation of additive, which involves (1) using graphene oxide as a raw material, preparing a dispersion of graphene oxide, adding a silane coupling agent to react at 25-100 degrees C for 1-6 hours, separating and washing, obtaining functional graphene oxide, (2) adding a dispersion of molybdenum sulfide to the silane coupling agent, reacting at 25-100 degrees C for 1-8 hours, separating and cleaning to obtain modified molybdenum sulfide, (3) mixing modified molybdenum sulfide, montmorillonite and functional graphene oxide for 0.5-2 hours, heating at 100-180 degrees C for 1-5 hour, and washing; and (2) use of additive for lubricating oil, and the concentration of additive in the lubricating oil is 0.011-0.133 wt.%.