Comparative Study of Friction Coefficients and Lubrication Mechanisms Based on Advanced Two-Dimensional Nanomaterials

Abstract

This paper systematically studies the tribological properties of four typical two-dimensional nanomaterials - graphene, molybdenum disulfide, MXene, and two-dimensional metal-organic frameworks (2D-MOFs) - as solid lubricants. Through a high-precision friction and wear tester, their friction coefficients and wear rates were measured under the same experimental conditions, and the morphology of the wear scars was analyzed using a scanning electron microscope. The results show that there are significant differences in the lubrication efficiency of different twodimensional materials. Among them, 2D-MOFs exhibit the most excellent and stable ultra-low friction characteristics (with a minimum friction coefficient of up to 0.004), while MXene shows the best load-carrying capacity. This paper systematically analyzes the performance differences through table comparisons and deeply explores the internal mechanisms, such as interlayer shearing, transfer film formation, and surface chemistry. This study provides important experimental data and a theoretical basis for screening the optimal two-dimensional lubricating material for specific working conditions.