To read this content please select one of the options below:

Tribological properties of trimethylolpropane oleate synthesized through esterification reaction with nano-MoS2 catalysts of different shapes

Zhixiang Li (School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, China)
Shuo Han (School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, China)
Lei Wang (School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, China)
Kunhong Hu (School of Energy, Materials and Chemical Engineering, Hefei University, Hefei, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 31 January 2023

Issue publication date: 15 February 2023

79

Abstract

Purpose

This study aims to investigate the catalytic performance and tribological properties of MoS2 powder.

Design/methodology/approach

In this work, the authors attempted to use MoS2 nanoparticles (nano-MoS2) as a catalyst to synthesize trimethylolpropane oleate (TMPTO) by esterification of trimethylolpropane and oleic acid. The small amount of highly dispersed nano-MoS2 catalyst remaining in TMPTO needed not to be separated and could be used as a lubricant modifier directly to achieve the purpose of improving the lubricity performance of TMPTO.

Findings

The results demonstrated that nano-MoS2 had good catalytic esterification ability and achieved in situ dispersion of about 0.191% nano-MoS2 in TMPTO while catalyzing the synthesis of base oil. After high-speed centrifugal sedimentation treatment, the product TMPTO still retained about 0.008% of nano-MoS2. The above-synthesized TMPTO has significantly better lubricity performance than commercially available TMPTO, in which the friction coefficient and wear rate could be reduced by 75%.

Originality/value

The results of this study provide an idea for the design of catalysts for ester oil synthesis.

Keywords

Acknowledgements

This project was supported by the National Natural Science Foundation of China (Grant No. 52075144) and the Natural Science Foundation for Colleges and Universities in Anhui Province (Grant No. 2022AH010096).

Citation

Li, Z., Han, S., Wang, L. and Hu, K. (2023), "Tribological properties of trimethylolpropane oleate synthesized through esterification reaction with nano-MoS2 catalysts of different shapes", Industrial Lubrication and Tribology, Vol. 75 No. 2, pp. 246-254. https://doi.org/10.1108/ILT-09-2022-0281

Publisher

:

Emerald Publishing Limited

Copyright © 2023, Emerald Publishing Limited

Related articles