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Research Article | Open Access

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

Zhengfeng CAO, Yanqiu XIA( ), Xiang XI
School of Energy Power and Mechanical Engineering, North China Electric Power University, Beijing 102206, China
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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-montmorilloniteinsulationfriction and wear

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Friction
Volume 5 Issue 2,
June 2017
Pages 219-230
DOI: 10.1007/s40544-017-0152-z

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Cite this article:
CAO Z, XIA Y, XI X. Nano-montmorillonite-doped lubricating grease exhibiting excellent insulating and tribological properties. Friction, 2017, 5(2): 219-230. https://doi.org/10.1007/s40544-017-0152-z

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Received: 28 October 2016
Revised: 13 January 2017
Accepted: 10 February 2017
Published: 12 May 2017
© The author(s) 2017

This article is published with open access at Springerlink.com

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.