Nano

SKKU Advanced Institute of Nano Technology (성균관대학교 성균나노과학기술원)
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MoS2/Montmorillonite Nanocomposite: Preparation, Tribological Properties, and Inner Synergistic Lubrication

  • Cheng, Lehua (College of Chemical and Materials Engineering Chaohu University) ;
  • Hu, Enzhu (Department of Chemical and Materials Engineering Hefei University) ;
  • Chao, Xianquan (Department of Chemical and Materials Engineering Hefei University) ;
  • Zhu, Renfa (Department of Chemical and Materials Engineering Hefei University) ;
  • Hu, Kunhong (Department of Chemical and Materials Engineering Hefei University) ;
  • Hu, Xianguo (Institute of Tribology, Hefei University of Technology)
  • Received : 2018.06.04
  • Accepted : 2018.11.07
  • Published : 2018.12.31
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Abstract

A nano-$MoS_2$/montmorillonite K-10 (K10) composite was prepared and characterized. The composite contains two types of 2H-$MoS_2$ nanoparticles. One is the hollow spherical $MoS_2$ with a size range of 75 nm, and the other is the spherical nano cluster of $MoS_2$ with a size range of 30 nm. The two kinds of nano-$MoS_2$ were formed via assembly of numerous $MoS_2$ nano-platelets with a size of ~10 nm. A tribological comparison was then made among nano-$MoS_2$/K10, K10, nano-$MoS_2$ and a mechanical mixture of K10 and nano-$MoS_2$. K10 reduced the wear but slightly increased the friction. Nano-$MoS_2$ remarkably reduced both friction and wear. The mechanical mixture demonstrated better wear resistance than nano-$MoS_2$, indicating a synergistic anti-wear effect of nano-$MoS_2$ and K10. The synergistic effect was reinforced using nano-$MoS_2$/K10 instead of the mechanical mixture. A part of the $MoS_2$ in the contact region always lubricated the friction pair, and the rest formed a tribofilm. K10 segregated the friction pair to alleviate the ablation wear but magnified the abrasive wear. S-$MoS_2$ protects K10 and they together function as both a lubricant and an isolating agent to reduce the ablation and abrasive wear.

Keywords

Acknowledgement

Supported by : Anhui Provincial Natural Science Foundation, National Natural Science Foundation of China, Anhui Province Universities

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