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Synthesis and temperature-sensitive lubrication behavior of PNIPAM microgels for titanium alloy

Yufu Xu (Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei, China)
Kequn Sun (Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei, China)
Quan Zheng (Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei, China)
Lulu Yao (School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei, China)
Yinghui Dong (Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei, China)
Ruhong Song (Institute of Tribology, School of Mechanical Engineering, Hefei University of Technology, Hefei, China)

Industrial Lubrication and Tribology

ISSN: 0036-8792

Article publication date: 18 March 2022

Issue publication date: 30 May 2022

165

Abstract

Purpose

This paper aims to offeri novel nano-additives polymer microgels to precisely improve the lubrication properties of titanium alloy under different temperatures.

Design/methodology/approach

The surfactant-free emulsion polymerization method was used to prepare Poly(N-isoprolylacrylamide) (PNIPAM) microgels. A ball-on-disk tribometer was applied to investigated the temperature-sensitive lubrication behavior of PNIPAM microgels.

Findings

The results show that the as-prepared microgels are ball-like nanoparticles with the size of 50–900 nm. In addition, potassium persulfate as initiator, complete mixing technic and high sodium dodecyl sulfate (SDS) concentration contribute to the formation of microgels with small size. The tribosystem shows a lower friction coefficient with the lubrication of PNIPAM microgels as aqueous solution additives when the temperature exceeding the critical temperature.

Originality/value

This work reports the temperature-sensitive lubrication of PNIPAM microgels. The critical temperature of PNIPAM microgels could be regulated by the addition of SDS in the solutions. This offers an effective and facile strategy for regulation of the critical temperature of smart microgels, which is helpful for the smart lubrication in the future.

Keywords

Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant No. 51875155).

Citation

Xu, Y., Sun, K., Zheng, Q., Yao, L., Dong, Y. and Song, R. (2022), "Synthesis and temperature-sensitive lubrication behavior of PNIPAM microgels for titanium alloy", Industrial Lubrication and Tribology, Vol. 74 No. 5, pp. 507-513. https://doi.org/10.1108/ILT-05-2021-0161

Publisher

:

Emerald Publishing Limited

Copyright © 2022, Emerald Publishing Limited

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