| Autor: |
Li, Zhixiang, Han, Shuo, Wang, Lei, Hu, Kunhong |
| Předmět: |
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| Zdroj: |
Industrial Lubrication & Tribology; 2023, Vol. 75 Issue 2, p246-254, 9p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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