Friction

, Volume 5, Issue 2, pp 219–230 | Cite as

Nano-montmorillonite-doped lubricating grease exhibiting excellent insulating and tribological properties

Open Access
Research Article

Abstract

Three types of nano-montmorillonite were doped as additives to afford lubricating greases. The physicochemical, insulating, and tribological performances of the obtained lubricating greases were investigated in detail. Furthermore, the tribological action mechanisms were analyzed by high magnification optical microscope, Raman spectroscopy, and energy dispersive X-ray spectroscope (EDS). The results show that the inorganic modification montmorillonite (IOMMT) can significantly increase the number of electron traps in the base grease, leading to excellent insulating performances. Moreover, IOMMT as a novel lubricant additive (1.5 wt% in grease) significantly enhances the friction reducing and anti-wear abilities for steel/steel contact that comprises a unique layered structure to prevent friction between the contact pairs and the protective tribofilm generated by physical adsorption and chemical reaction.

Keywords

nano-montmorillonite insulation friction and wear 

Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China (No. 51575181) and Beijing Natural Science Foundation of China (No. 51575181).

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© The author(s) 2017

Open Access: The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  1. 1.School of Energy Power and Mechanical EngineeringNorth China Electric Power UniversityBeijingChina

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