Investigation on the Effect of Ionic Liquids on the Dispersion and Lubrication Performance of Nano-silver-Based Lubricating Oils

IF 2.9 3区工程技术 Q2 ENGINEERING, CHEMICAL

Tribology Letters Pub Date : 2024-12-14 DOI:10.1007/s11249-024-01935-4

Chengjie Jin, Long Sun, Kexin Cao, Peng Chen, Songquan Wang, Ningning Hu

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Abstract

Aiming at the phenomenon that nanosilver lubricants are prone to agglomeration and sedimentation, the influence of different anions and cations in ionic liquids on the adsorption capacity of nanosilver particles is studied, and three ionic liquids with different structures are selected to improve the agglomeration of nanosilver particles in lubricants and to improve the anti-wear performance of lubricants; the dispersive performance of different ionic liquids is studied using quantum chemical simulation methods to study the adsorption and dispersion mechanism of nanosilver. The tribological properties of the three different ionic liquids in combination with the nanosilver lubricant were investigated using a multifunctional friction and wear tester and a field emission scanning electron microscope. The results show that hexyltributylphosphine hexafluorophosphate ([P4446][PF6]) can stabilise the dispersion of nanosilver lubricant and solve the problem of agglomeration and sedimentation due to its strong adsorption cation, which is attributed to its high adsorption and the synergistic effect of friction chemistry, and its anionic intermixing is good, and the ionic liquids have excellent anti-friction and wear reduction properties. It is shown that the design and utilisation of functional ionic liquids with the compound effect of nanosilver particles can effectively improve the dispersion of nanosilver as a lubricant additive.

Graphic Abstract

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离子液体对纳米银基润滑油的分散和润滑性能的影响研究

针对纳米银润滑剂易团聚和沉降的现象，研究了离子液体中不同阴阳离子对纳米银颗粒吸附能力的影响，选择了三种不同结构的离子液体，以改善纳米银颗粒在润滑剂中的团聚，提高润滑剂的抗磨性能；利用量子化学模拟方法研究了不同离子液体的分散性能，研究了纳米银的吸附和分散机理。使用多功能摩擦磨损测试仪和场发射扫描电子显微镜研究了三种不同离子液体与纳米银润滑剂结合的摩擦学特性。结果表明，六氟磷酸基三丁基膦（[P4446][PF6]）因其吸附阳离子性强，可稳定纳米银润滑剂的分散，解决团聚和沉积问题，这得益于其高吸附性和摩擦化学的协同效应，且其阴离子互混性好，离子液体具有优异的抗摩擦和减磨性能。研究表明，设计和利用具有纳米银颗粒复合效应的功能性离子液体，可有效提高纳米银作为润滑油添加剂的分散性。图文摘要

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来源期刊

Tribology Letters 工程技术-工程：化工

CiteScore

5.30

自引率

9.40%

发文量

116

审稿时长

2.5 months

期刊介绍： Tribology Letters is devoted to the development of the science of tribology and its applications, particularly focusing on publishing high-quality papers at the forefront of tribological science and that address the fundamentals of friction, lubrication, wear, or adhesion. The journal facilitates communication and exchange of seminal ideas among thousands of practitioners who are engaged worldwide in the pursuit of tribology-based science and technology.