Engineering surface functional groups of 2D organic metal chalcogenides to regulate lubrication performance across scales

IF 6.1 1区工程技术 Q1 ENGINEERING, MECHANICAL

Tribology International Pub Date : 2024-11-26 DOI:10.1016/j.triboint.2024.110420

Haowen Luo , Yaoming Zhang , Zhuoxuan Lv , Shaozhen Luo , Yang Ou , Huidan Xue , Guan-E. Wang , Gang Xu , Jianxi Liu

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引用次数: 0

Abstract

Two-dimensional (2D) layered materials are widely used to enhance lubrication performance in various conditions due to their low friction and sliding interfaces. However, the uncontrolled modification and dispersion of functional groups on 2D materials limit their lubrication performance and ultra-low friction capabilities at different scales. Herein, we developed three Pb-based organic metal chalcogenides nanosheets, Pb(SPh-NH₂/-COOH/-OH), with long-range ordered functional groups on the [PbS₂] layer, to reduce friction and wear across scales. We organically modified these nanosheets prior to exfoliation, achieving micro-lateral and nano-vertical size. As ethanol additives, these nanosheets reduced the coefficient of friction (COF) and wear volume by over 44.8 % and 78.9 %, respectively. Dry tests demonstrated the Pb(SPh-OH) coating on SiO₂/Si substrate reduced the COF from 0.65 to 0.07. Compared to SiO₂/Si substrate, lateral force microscopy revealed friction reducing up to 57.5 %, 85.5 %, and 90.9 % for Pb(SPh-NH₂/-COOH/-OH), respectively. These novel 2D materials provide a heuristic strategy for lubrication, suitable for anti-friction applications under different conditions across scales.

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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.