Relationship between Friction Reduction Effect and Solubility in Base Oil of Organic Friction Modifiers

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-10-10 DOI:10.1016/j.triboint.2024.110304

Haiyang Gu , Tomoko Hirayama , Naoki Yamashita , Jimin Xu , Masako Yamada

引用次数: 0

Abstract

This study explored the relationship between the solubility of additives in base oils and their friction-reduction efficacy using cetyl alcohol as a model additive. Atomic force microscope friction tests demonstrated that the friction-reduction effect of cetyl alcohol varied significantly across the base oils. The solvation free energy was computed to evaluate the solubility of cetyl alcohol. A direct proportional relationship between friction-reduction and solvation free energy was observed, indicating additives with lower solubility have better friction-reduction performance. Neutron reflectometry experiments and molecular dynamics simulations revealed that lower solubility correlates with stronger adsorption. This study quantitatively clarified the relationship between solubility, adsorption, and friction reduction, providing insights into optimizing lubricant formulations and contributing to a deeper understanding of boundary lubrication mechanisms.

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减摩效果与有机摩擦改进剂在基础油中的溶解度之间的关系

本研究以十六醇为模型添加剂，探讨了添加剂在基础油中的溶解度与其减摩效果之间的关系。原子力显微镜摩擦测试表明，不同基础油中十六烷基酚的减摩效果差异很大。通过计算溶解自由能来评估鲸蜡醇的溶解度。结果表明，摩擦降低效果与溶解自由能之间存在正比关系，这表明溶解度较低的添加剂具有更好的摩擦降低性能。中子反射仪实验和分子动力学模拟显示，溶解度越低，吸附力越强。这项研究定量阐明了溶解度、吸附和摩擦降低之间的关系，为优化润滑剂配方提供了见解，并有助于加深对边界润滑机制的理解。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.