Cu nanoparticles decorated WS2 nanosheets as a lubricant additive for enhanced tribological performance

Zhuang Xu; Wenjing Lou; Gaiqing Zhao; Dongdong Zheng; Junying Hao; Xiaobo Wang

doi:10.1039/c9ra00337a

Cu nanoparticles decorated WS₂ nanosheets as a lubricant additive for enhanced tribological performance

RSC Adv. 2019 Mar 8;9(14):7786-7794. doi: 10.1039/c9ra00337a. eCollection 2019 Mar 6.

Authors

Zhuang Xu^{1

2}, Wenjing Lou¹, Gaiqing Zhao¹, Dongdong Zheng¹, Junying Hao¹, Xiaobo Wang¹

Affiliations

¹ State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou 730000 China wangxb@licp.cas.cn.
² University of Chinese Academy of Sciences Beijing 100049 PR China.

Abstract

Tungsten disulfide-polydopamine-copper (WS₂-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. WS₂ nanosheets were decorated by uniformly dispersed Cu nanoparticles (Cu NPs). The WS₂-PDA-Cu nanocomposites with good dispersion stability, showed better friction reducing and anti-wear properties than WS₂, Cu NPs and WS₂-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.