▎ 摘　　要

The preparation of TiO2/F-rGO nanocomposites by an in situ synthesis method was discussed, and the nanocomposites were used as lubricant additives. The morphology and structure of TiO2/F-rGO nanocomposites showed that there was an excellent link between TiO2 nanoparticles and F-rGO nanosheets. The tribological results showed that TiO2/F-rGO nanocomposites as lubricant additives displayed a low coefficient of friction and excellent wear resistance capacity. Furthermore, it was illustrated that the TiO2 nanoparticles and the F-rGO nanosheets in the TiO2/F-rGO nanocomposites had a synergistic lubricating effect. The coefficient of friction(COF) and wear rate of the TiO2/F-rGO nanocomposites decreased by 33.67% and 88.38%, respectively, compared with those of pure oil, suggesting that these nanocomposites display excellent application prospects as novel lubricant additives.