铜纳米颗粒修饰的WS纳米片作为一种润滑添加剂以增强摩擦学性能。
Cu nanoparticles decorated WS nanosheets as a lubricant additive for enhanced tribological performance.
作者信息
Xu Zhuang, Lou Wenjing, Zhao Gaiqing, Zheng Dongdong, Hao Junying, Wang Xiaobo
机构信息
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China
University of Chinese Academy of Sciences Beijing 100049 PR China.
出版信息
RSC Adv. 2019 Mar 8;9(14):7786-7794. doi: 10.1039/c9ra00337a. eCollection 2019 Mar 6.
Tungsten disulfide-polydopamine-copper (WS-PDA-Cu) nanocomposites were first prepared by a green and effective biomimetic strategy and then used as a lubricant additive in polyalkylene glycol (PAG). The biomimetic strategy is inspired by the adhesive proteins in mussels. WS nanosheets were decorated by uniformly dispersed Cu nanoparticles (Cu NPs). The WS-PDA-Cu nanocomposites with good dispersion stability, showed better friction reducing and anti-wear properties than WS, Cu NPs and WS-Cu dispersed in PAG base oil. The average friction coefficient and wear volume were reduced by 33.56% and 97.95%, respectively, at 150 °C under a load of 100 N for the optimal concentration of 0.9 wt%. The lubrication mechanism was discussed.
二硫化钨-聚多巴胺-铜（WS-PDA-Cu）纳米复合材料首先通过一种绿色高效的仿生策略制备而成，然后用作聚亚烷基二醇（PAG）中的润滑剂添加剂。该仿生策略的灵感来源于贻贝中的粘附蛋白。WS纳米片由均匀分散的铜纳米颗粒（Cu NPs）修饰。具有良好分散稳定性的WS-PDA-Cu纳米复合材料，在PAG基础油中比WS、Cu NPs和WS-Cu表现出更好的减摩和抗磨性能。在100 N载荷、150℃条件下，对于0.9 wt%的最佳浓度，平均摩擦系数和磨损体积分别降低了33.56%和97.95%。文中还讨论了润滑机理。
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