还原氧化石墨烯/MoS_2与碳纳米管/MoS_2作为润滑油添加剂的摩擦学性能研究

Tribological Property of RGO/MoS_2 and CNTs/MoS_2 as Lubricated Oil Additives

通过水热法成功制备出还原氧化石墨烯/Mo S2(RGO/Mo S2)与碳纳米管/Mo S2(CNTs/Mo S2)纳米复合材料,采用XRD,SEM以及TEM分别对纳米复合材料样品进行了分析和表征,结果表明所制备的复合材料中Mo S2与还原氧化石墨烯、碳纳米管很好地结合在一起。用UMT-2多功能摩擦试验机测试其作为液体石蜡添加剂的摩擦磨损性能,并对其摩擦机理进行了分析。研究发现,与纯的Mo S2相比,一定比例的RGO/Mo S2纳米复合材料作为润滑油添加剂的摩擦系数降低了18%,相对磨损量减少55%;与碳纳米管增强的纳米复合材料相比,RGO/Mo S2纳米复合材料具有更好的摩擦磨损性能。

RGO / Mo S2 and CNTs / Mo S2 nanocomposites were fabricated by hydrothermal method. The structure and morphology of the as-prepared nanocomposites were characterized by XRD,SEM and TEM.The results show that RGO,CNTs and Mo S2 are in very good combination. The tribological properties of the as-prepared nanocomposites as the additives in base oil was investigated by UMT-2 micro-tribotester,and its friction mechanism was analyzed. The friction coefficient reduced 18% and the relative wear loss decreases 55% of the RGO / Mo S2 nanocomposites with a certain ratio as lubricated oil additives compared with pure Mo S2. Compared with composites reinforced by carbon nanotubes,RGO / Mo S2 nanocomposites have a better tribological properties.