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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Acknowledgements
The authors acknowledge financial support from the National Key R&D Program of China (2021YFA0716304), the National Natural Science Foundation of China (52075524, 21972153, and U21A20280), the Youth Innovation Promotion Association of CAS (2022429 and 2018454), Gansu Province Science and Technology Plan (20JR10RA060 and 20JR10RA048), and LICP Cooperation Foundation for Young Scholars (HZJJ21-06).
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Zhiquan YANG. He studied at Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, China, from 2019 to 2021. At present, he is studying at Hefei University of Technology, China. His research focuses on the interfacial tribo-chemistry, design, synthesis, and tribological mechanism of nano lubricating materials.
Qiangliang YU. He got his Ph.D. degree in 2016 at Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, China. He is an associate professor at the State Key Lab of Solid Lubrication in Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences. He has authored or co-authored more than 50 journal papers. His research focuses on the synthesis of task-specific ionic liquids lubricants, organic corrosion inhibitors, and abrasive corrosion resistant coating.
Meirong CAI. She got her Ph.D. degree in 2012 at Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, China. She is a full professor at the State Key Lab of Solid Lubrication in Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences. She has authored or co-authored 100 journal papers which received more than 2400 citations and has the high-index 31. Her research interests are tribochemistry, ionic liquids lubricants, and supramolecular gel lubricants.
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Zhang, C., Yang, Z., Huang, Q. et al. Lignin composite ionic liquid lubricants with excellent anti-corrosion, anti-oxidation, and tribological properties. Friction 11, 1239–1252 (2023). https://doi.org/10.1007/s40544-022-0657-y
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DOI: https://doi.org/10.1007/s40544-022-0657-y