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Research Article | Open Access

Novel concept of nano-additive design: PTFE@silica Janus nanoparticles for water lubrication

Yanfei LIU1,†( ), Hailing HE2,†, Meng YANG3,4,5, Ruize ZHANG1, Shengtao YU1, Tiantian YANG2, Wenzhong WANG1, Fuxin LIANG2( )
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100081, China
Institute of Polymer Science & Engineering, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China
MOE Key Laboratory of Bioinformatics, Center for Plant Biology, School of Life Sciences, Tsinghua University, Beijing 100084, China
Tsinghua-Peking Center for Life Sciences, Beijing 100084, China
College of Biological Sciences, China Agricultural University, Beijing 100193, China

† Yanfei LIU and Hailing HE contributed equally to this work.

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Graphical Abstract

Abstract

Polytetrafluoroethylene (PTFE) has been widely used as a lubrication additive for reducing friction and wear; however, the hydrophobic nature of PTFE restricts its application in eco-friendly water-based lubrication systems. In this study, for the first time, we designed novel PTFE@silica Janus nanoparticles (JNs) to meet the requirement for additives in water-based lubricants, which have excellent dispersion stability in water attributed to the unique amphiphilic structure. By introducing the lubrication of the aqueous dispersion of the JNs with a concentration of 0.5 wt%, the coefficient of friction (COF) and wear volume were reduced by 63.8% and 94.2%, respectively, comparing to those with the lubrication of pure water. Meanwhile, the JNs suspension also exhibits better lubrication and wear-resistance performances comparing to commercial silica and PTFE suspensions. The excellent tribological behaviors of PTFE@silica JNs as nano-additives could be attributed to the synergetic effect of the two components, where the PTFE provided lubrication through the formed tribofilms on the friction pairs, and the rigid silica further enhanced the wear-resistance performance. Most importantly, the unique structure of JNs makes it possible to use PTFE as an additive in water-lubrication systems. Our study shed light on the design and application of novel JNs nanomaterials as additives to meet the requirements of future industrial applications.

Keywords

Janus nanoparticles (JNs)polytetrafluoroethylene (PTFE)nano-additivesfrictionlubrication

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Friction
Volume 12 Issue 2,
February 2024
Pages 258-270
DOI: 10.1007/s40544-023-0749-3
Cite this article:
LIU Y, HE H, YANG M, et al. Novel concept of nano-additive design: PTFE@silica Janus nanoparticles for water lubrication. Friction, 2024, 12(2): 258-270. https://doi.org/10.1007/s40544-023-0749-3

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Received: 17 July 2022
Revised: 29 August 2022
Accepted: 17 February 2023
Published: 11 May 2023
© The author(s) 2023.

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