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    • Effect of functional groups on tribological properties of lubricants and mechanism investigation
    Authors: Hongxiang, Yu; Haijie, Chen; Zhiwen, Zheng;  Advisor: -;  Co-Author: - (2022)

    Nine organic compounds were utilized as model lubricants to investigate the impact of functional groups on tribological performances. Nonanoic Acid with carboxyl showed the best lubrication properties, and fluid film and tribofilm were coexistent in its friction test, bringing a low friction coefficient and wear rate. In addition, the lubricant with low friction coefficient corresponded to high adsorption energy in density functional theory (DFT) calculations. And the lubricant forming adsorption film with large surface energy displayed small wear rate in friction test.