In order to increase the life of spacecraft, it is important to improve the comprehensive lubrication performance. Multiple alkylated cyclopentane (MAC) lubricants are presently gaining wide acceptance for actual space applications; adding extreme pressure additive is a strategy to improve lubrication performance. In this study, taking 1,3,4-tri-(2-octyldodecyl) cyclopentane as base oil, tricresol phosphate (traditional additive) and tri-(2-octyldodecyl) phosphate (developmental additive) have been screened computationally for compatibility, shear film forming and energy dissipation. Theoretical results indicate that (a) tricresol phosphate additive is not suited for addition to 1,3,4-tri-(2-octyldodecyl) cyclopentane lubricant due to limited compatibility; (b) tri-(2-octyldodecyl) phosphate is an excellent lubricant additive due to its perfect compatibility, ease of forming a shear film on the surface of friction pairs, higher strength, and low energy dissipation; and (c) lubrication occurs through the solid-liquid composite lubrication mechanism. These theoretical results were confirmed experimentally.
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Jingyan NIAN. He received his master degree in physical chemistry in 2012 from Northwest Normal University, Lanzhou, China. During his undergraduate, he joined the State Key Laboratory of Solid Lubrication at Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences. His current position is an associate researcher. His research area covers the atomic-scale friction, superlubricity, and space lubrication.
Yifan SI. He joined Prof. Guo’s biomimetic materials of tribology (BMT) group at University of Hubei in 2014 in pursuing his Ph.D. degree. His current scientific interests are devoted to designing and fabricating superhydrophobic nanocoatings and studying their corresponding applications.
Zhiguang GUO. He received his Ph.D. degree from Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences (CAS) in 2007. During Feb. 2009 to Feb. 2010, he worked in Department of Physics, University of Oxford, UK, as a visiting scholar. Now he is a full professor in LICP financed by “Top Hundred Talents” program of CAS. Till now, he has published more than 130 papers about the interfaces of materials.
Ping GAO. She got her B.S. degree in 1989 in Lanzhou University, China. She is currently an associate professor in State Key Lab of Solid Lubrication, LICP, CAS. Her research interests mainly include organic synthesis and chemistry of materials.
Weimin LIU. He received his Ph.D. degree with major of lubricating materials and tribology from Lanzhou Institute of Chemical Physics (LICP), Chinese Academy of Sciences in 1990. In 2013, he was elected as the fellow of Chinese Academy of Sciences, and now, he is the director of the state key lab of solid lubrication. Up to now, he has published more than 500 papers and his research interests mainly focus on space lubrication and high performance lubricants.
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Nian, J., Si, Y., Guo, Z. et al. Characterizing a lubricant additive for 1,3,4-tri-(2-octyldodecyl) cyclopentane: Computational study and experimental verification. Friction 4, 257–265 (2016). https://doi.org/10.1007/s40544-016-0124-8