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Research Article | Open Access

Lignin composite ionic liquid lubricants with excellent anti-corrosion, anti-oxidation, and tribological properties

Chaoyang ZHANG1,†, Zhiquan YANG1,†, Qing HUANG2, Xingwei WANG3, Wufang YANG1,3,4, Chunyu ZHOU4, Bo YU1,3,4, Qiangliang YU1,3,4( ), Meirong CAI1,3,4 ( ), Feng ZHOU1
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, China
PetroChina Lanzhou Lubricating Oil R&D Institute, Lanzhou 730060, China
Shandong Laboratory of Yantai Advanced Materials and Green Manufacturing, Yantai 264006, China
Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering, Yantai 264006, China

† Chaoyang ZHANG and Zhiquan YANG contributed equally to this work.

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Abstract

A new type of lubricating material (BTA-P4444-Lig) was synthesized by combining lignin with tetrabutylphosphorus and benzotriazole. The tribological properties, corrosion resistance, and anti-oxidation properties of BTA-P4444-Lig as a lubricant were investigated. The lubricating material exhibits excellent friction reduction and wear resistance, as well as good thermal stability and excellent oxidation resistance. Mechanistic analysis reveals that the active elements N and P in the lubricating material react with the metal substrate, and the reaction film effectively blocks direct contact between the friction pairs, affording excellent friction reduction and wear resistance. At the same time, the phenolic hydroxyl group in lignin reacts with oxygen free radicals to form a resonance-stable semi-quinone free radical, which interrupts the chain reaction and affords good anti-oxidant activity.

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Keywords

ligninlubricationionic liquidanti-oxidant

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Friction
Volume 11 Issue 7,
July 2023
Pages 1239-1252
DOI: 10.1007/s40544-022-0657-y

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Cite this article:
ZHANG C, YANG Z, HUANG Q, et al. Lignin composite ionic liquid lubricants with excellent anti-corrosion, anti-oxidation, and tribological properties. Friction, 2023, 11(7): 1239-1252. https://doi.org/10.1007/s40544-022-0657-y

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Received: 03 January 2022
Revised: 24 March 2022
Accepted: 23 May 2022
Published: 28 July 2022
© The author(s) 2022.

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