类石墨烯二硫化钼的制备及其真空摩擦学性能研究  

The Preparations of Graphene-Like Molybdenum Disulfide and Research in Tribological Properties in High Vacuum

作　　者：张丽丽[1,2] 蒲吉斌[1] 张广安[1] 王立平[1] 薛群基[1] 

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点试验室,甘肃兰州730000 [2]中国科学院中科院大学,北京100049

出　　处：《摩擦学学报》2015年第6期746-753,共8页Tribology

基　　金：国家自然科学基金(21373249,51322508)资助~~

摘　　要：采用电化学剥离法制备了类石墨烯二硫化钼(MoS_2)片层,采用场发射扫描电子显微镜、透射电子显微镜表征了类石墨烯二硫化钼的结构.利用真空摩擦试验机测试了含类石墨烯MoS_2添加剂离子液体(IL-MoS_2)的摩擦学性能并与纯离子液体(IL)进行了对比.利用光学显微镜和扫描电子显微镜观察磨斑处的形貌并用X射线光电子能谱仪表征了IL-MoS_2摩擦前后的化学状态,并对润滑机理进行了分析.结果表明:电化学剥离法成功制备了类石墨烯MoS_2,这种制备方法简单易行,制得的类石墨烯MoS_2面积大,质量好,能保持二硫化钼固有的结构.IL-MoS_2对钢/钢摩擦副具有优异的减摩抗磨作用;摩擦过程中,纳米尺寸的二硫化钼吸附在钢/钢摩擦副界面形成了保护层,避免摩擦副的直接接触,降低摩擦磨损.In this study, graphene-like MoS2 nanosheets were prepared by electrochemical exfoliation. The graphene-like MoS2 were characterized using field-emission scanning electron microscopy, high-resolution transmission electron microscopy. The tribological properties of graphene-like MoS2 as an additive in ionic liquids at high vacuum were compared to that of bare ionic liquid （IL）. The wear surfaces were analyzed via optical microscope and scanning electron microscopy, chemical composition of the nanofluids （IL and IL-MoS2） were investigated via X-ray photo electron spectroscopy. The results show that large-area MoS2 nanosheets can be obtained from the simple electrochemical exfoliation method. The exfoliated MoS2 nanosheets were of high quality and had an intrinsic structure. Ionic liquids with graphene-like MoS2 had low friction and low wear rate under high vacuum condition. The improved frictional properties were attributed to the transfer film of graphene-like MoS2.

关 键 词：类石墨烯二硫化钼 电化学剥离 材料制备 结构表征 离子液体 摩擦学性能 

分 类 号：TH117.2[机械工程—机械设计及理论]