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Volume 11
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10.3390/lubricants11080336
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Article

Enhancing Lubrication Performance of Calcium Sulfonate Complex Grease Dispersed with Two-Dimensional MoS2 Nanosheets

by
Shuo Xiang
1,
Xufei Long
2,
Qinhui Zhang
1,*,
Pengfei Ma
1,
Xin Yang
1,
Hui Xu
3,
Peng Lu
4,
Peng Su
1,
Weihua Yang
1 and
Yan He
1
1
Army Logistics Academy of PLA, Chongqing 401311, China
2
Unit 32358, Lhasa 850032, China
3
Shandong Honsing Chemical Co., Ltd., Dongying 257335, China
4
Unit 91967, Xingtai 054000, China
*
Author to whom correspondence should be addressed.
Lubricants 2023, 11(8), 336; https://doi.org/10.3390/lubricants11080336
Submission received: 10 July 2023 / Revised: 4 August 2023 / Accepted: 4 August 2023 / Published: 8 August 2023
(This article belongs to the Special Issue Applied Nanotribology, 3rd Edition)
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Abstract

Calcium sulfonate complex greases (CSCG) have proven to be a sustainable alternative to lithium complex greases, which still require appropriate additives to deliver lubrication performance benefits under extreme working conditions such as heavy load, high speed, and high temperature. The anti-wear and friction reducing properties of CSCG enhanced by two-dimensional MoS2 nanosheets (2D MoS2) with a narrow lateral size and thickness distributions were evaluated by a four-ball tribometer. The results showed that the CSCG with 0.6 wt.% 2D MoS2 performs best, with a 56.4% decrease in average friction coefficient (AFC), 16.5% reduction in wear scar diameter (WSD), 14.3% decrease in surface roughness, and a 59.4% reduction in average wear depth. Combining SEM-EDS images, Raman, and X-ray photoelectron spectra, it is illustrated that the physical transferred film and tribo-chemical film consisting of MoS2, Fe2O3, FeSO4, CaCO3, CaO, and MoO3 were generated on the worn surface, which improves the lubrication performance of CSCG considerably.
Keywords: two-dimensional MoS2 nanosheets; calcium sulfonate complex grease; lubrication performance; physical transferred film; tribo-chemical film two-dimensional MoS2 nanosheets; calcium sulfonate complex grease; lubrication performance; physical transferred film; tribo-chemical film

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MDPI and ACS Style

Xiang, S.; Long, X.; Zhang, Q.; Ma, P.; Yang, X.; Xu, H.; Lu, P.; Su, P.; Yang, W.; He, Y. Enhancing Lubrication Performance of Calcium Sulfonate Complex Grease Dispersed with Two-Dimensional MoS2 Nanosheets. Lubricants 2023, 11, 336. https://doi.org/10.3390/lubricants11080336

AMA Style

Xiang S, Long X, Zhang Q, Ma P, Yang X, Xu H, Lu P, Su P, Yang W, He Y. Enhancing Lubrication Performance of Calcium Sulfonate Complex Grease Dispersed with Two-Dimensional MoS2 Nanosheets. Lubricants. 2023; 11(8):336. https://doi.org/10.3390/lubricants11080336

Chicago/Turabian Style

Xiang, Shuo, Xufei Long, Qinhui Zhang, Pengfei Ma, Xin Yang, Hui Xu, Peng Lu, Peng Su, Weihua Yang, and Yan He. 2023. "Enhancing Lubrication Performance of Calcium Sulfonate Complex Grease Dispersed with Two-Dimensional MoS2 Nanosheets" Lubricants 11, no. 8: 336. https://doi.org/10.3390/lubricants11080336

APA Style

Xiang, S., Long, X., Zhang, Q., Ma, P., Yang, X., Xu, H., Lu, P., Su, P., Yang, W., & He, Y. (2023). Enhancing Lubrication Performance of Calcium Sulfonate Complex Grease Dispersed with Two-Dimensional MoS2 Nanosheets. Lubricants, 11(8), 336. https://doi.org/10.3390/lubricants11080336

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