▎ 摘　　要

In order to improve the lubrication performance of polytetrafluoroethylene (PTFE) coating. Modified graphene (RGO) was prepared by Hummers method and ion modification method. RGO/PTFE composites were prepared by solvent-assisted blending. The surface morphology and microstructure of RGO, PTFE and composites with different concentrations were characterized and analyzed by scanning electron microscopy (SEM), Raman spectroscopy (XRD) and X-ray diffraction (XRD). The tribological properties of RGO, PTFE and composite coatings based on 45# steel were studied by ball-disk friction tests. The wear marks were characterized by scanning electron microscope (SEM), energy dispersive instrument (EDS) and 3D profiler. The results show that 5 wt% RGO/ PTFE composite has lower friction coefficient and the best wear resistance. The friction coefficient of the composite is as low as 0.11, which is 37% and 51% lower than that of single-component RGO and PTFE, respectively. The wear resistance of the composite is 155.8% higher than that of single-component RGO and PTFE. The formulations of lubricating coatings in this paper are independently developed and have excellent antiwear effects. The synergistic mechanism of RGO and PTFE is proposed to explain the improvement of friction properties of composite coatings.