Tribological properties of polyalphaolefin oil containing POSS-based ionic liquids under atmospheric and atomic oxygen conditions for space tribosystems

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Wear Pub Date : 2025-07-04 DOI:10.1016/j.wear.2025.206232

Yuchen Sun , Chaoyang Zhang , Qiangliang Yu , Mohamed Kamal Ahmed Ali

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引用次数: 0

Abstract

This study aims to synthesize oil additives tailored for harsh space conditions, particularly atomic oxygen (AO) exposure, to enhance the lubrication performance of aerospace systems. To achieve this, polyhedral oligomeric silsesquioxane (POSS)-based ionic liquid (IL) with varying alkyl chain lengths (n = 8,16) were synthesized through nucleophilic substitution reactions, using octyl-functionalized polyhedral oligomers and halogenated hydrocarbons as precursors. The tribological and resistance AO irradiation properties of POSS-based IL additives (POSS-8-DOSS and POSS-16-DOSS) into PAO10 base oil were systematically investigated in atmospheric and vacuum environments. The properties of the formulated oil revealed that adding 1 wt% POSS-8-DOSS resulted in improved thermal stability compared to POSS-16-DOSS. Conversely, POSS-16-DOSS exhibited better performance in terms of corrosion resistance. Notably, the formulated oil containing POSS-based IL additives reduced the friction coefficient by 39.67–40.38 % in the atmospheric environment and by 65.94–79.89 % in the atomic oxygen radiation environment. Furthermore, the antiwear properties improved by 77.50–90.14 % in the atmospheric environment. Eventually, the results of this study provide valuable insights for advancing the field of aerospace lubrication.

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空间摩擦系统常压和原子氧条件下含poss离子液体聚烯烃油的摩擦学性能

本研究旨在合成适合恶劣空间条件的润滑油添加剂，特别是原子氧（AO）暴露，以提高航空航天系统的润滑性能。为此，以辛基功能化的多面体低聚物和卤化烃为前体，通过亲核取代反应合成了不同烷基链长（n = 8,16）的多面体低聚硅氧烷（POSS）基离子液体（IL）。系统研究了POSS-8-DOSS和POSS-16-DOSS在PAO10基础油中的摩擦学性能和耐AO辐照性能。配方油的性能表明，与POSS-16-DOSS相比，添加1 wt%的POSS-8-DOSS可以改善热稳定性。相反，POSS-16-DOSS在耐腐蚀方面表现出更好的性能。值得注意的是，含有poss基IL添加剂的配方油在大气环境下的摩擦系数降低了39.67 ~ 40.38%，在原子氧辐射环境下的摩擦系数降低了65.94 ~ 79.89%。大气环境下的抗磨性能提高了77.50 ~ 90.14%。最终，本研究结果为推进航空航天润滑领域提供了有价值的见解。

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

Wear 工程技术-材料科学：综合

CiteScore

8.80

自引率

8.00%

发文量

280

审稿时长

47 days

期刊介绍： Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.