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Tribology Letters

, 67:47 | Cite as

Synergistic Effects Between the Two Choline-Based Ionic Liquids as Lubricant Additives in Glycerol Aqueous Solution

  • Dongdong Zheng
  • Xiaobo WangEmail author
  • Ming Zhang
  • Chao Ju
Original Paper
  • 46 Downloads

Abstract

Two choline-based ionic liquids (ILs) were used as lubricant additives in the aqueous glycerol solution, and the tribological properties of their different combinations were investigated. They exhibit remarkable synergistic effects on the antiwear and friction-reducing abilities. The combinations of both ILs more significantly improve the lubricity of the glycerol solution compared with the independent additives. In addition, the tribological behavior of the optimal combination was explored under different temperature and load conditions. The lubricating property of the optimal additive formulation is weakened with the increase of temperature, but enhanced with the increase of load. The worn surfaces were analyzed using SEM-EDAX and XPS. Meanwhile, Monte Carlo simulations were performed to study the adsorption behavior of the additives on iron surface in the presence of water. Remarkable synergistic lubricating interactions between the ILs are ascribed to the formation of compact and stable boundary films composed of mixed adsorbed layers and complex tribofilms.

Keywords

Choline Ricinoleic acid 2-Mercaptobenzothiazole (MBT) Ionic liquids (ILs) Monte Carlo simulations 

Notes

Acknowledgements

The authors are grateful to the National Natural Science Foundation of China (NSFC 51475445 and 51775536).

Supplementary material

11249_2019_1161_MOESM1_ESM.docx (392 kb)
Supplementary material 1 (DOCX 392 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Dongdong Zheng
    • 1
    • 2
    • 3
    • 4
  • Xiaobo Wang
    • 1
    Email author
  • Ming Zhang
    • 1
  • Chao Ju
    • 1
  1. 1.State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhouPeople’s Republic of China
  2. 2.University of Chinese Academy of SciencesBeijingPeople’s Republic of China
  3. 3.Jiangsu Xuzhou Construction Machinery Research InstituteXuzhouPeople’s Republic of China
  4. 4.State Key Laboratory of Intelligent Manufacturing of Advanced Construction Machinery, Xuzhou Construction Machinery GroupXuzhouPeople’s Republic of China

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