Experimental and theoretical study on relationship between anionic structures and tribological properties of oil-miscible ionic liquids

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-12-17 DOI:10.1016/j.triboint.2024.110466

Qiangliang Yu , Chen Zhao , Chaoyang Zhang , Xiangjian Wang , Yuchen Sun , Mohamed Kamal Ahmed Ali , Yu Liu , Shuang Sun , Meirong Cai , Feng Zhou , Weimin Liu

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引用次数: 0

Abstract

Two oil-miscible ionic liquids (ILs) with different anions, phosphate (N₈₈₈₁₆P₄) and phosphorothioate (N₈₈₈₁₆SP₄), were applied in PAO10 as lubricating additives. Adsorption layers and tribofilms formed at the interface With ILs, which facilitated transition from adhesive to abrasive wear and enhanced the tribological performance. Moreover, N₈₈₈₁₆SP₄ outperformed N₈₈₈₁₆P₄, especially at elevated temperature and under extremely high pressure. As revealed by density functional theory (DFT) calculation and transmission electron microscopy (TEM) analysis, S-containing anions not only enhanced the adsorption of ILs, but also participated into the tribochemical reaction, resulting in a tribofilm consists of iron oxides and sulfides. As the temperature increased, the content of sulfides increased, leading to superior tribological performance.

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来源期刊

Tribology International 工程技术-工程：机械

CiteScore

10.10

自引率

16.10%

发文量

627

审稿时长

35 days

期刊介绍： Tribology is the science of rubbing surfaces and contributes to every facet of our everyday life, from live cell friction to engine lubrication and seismology. As such tribology is truly multidisciplinary and this extraordinary breadth of scientific interest is reflected in the scope of Tribology International. Tribology International seeks to publish original research papers of the highest scientific quality to provide an archival resource for scientists from all backgrounds. Written contributions are invited reporting experimental and modelling studies both in established areas of tribology and emerging fields. Scientific topics include the physics or chemistry of tribo-surfaces, bio-tribology, surface engineering and materials, contact mechanics, nano-tribology, lubricants and hydrodynamic lubrication.