Functional alkylimidazolium ionic liquids as lubricants for steel/aluminum contact: Influence of the functional groups on tribological performance

Functional alkylimidazolium ionic liquids as lubricants for steel/aluminum contact: Influence of... Four different functional alkylimidazolium (1-hydroxyethyl-3-methylimidazolium, 1-carboxyethyl-3-methylimidazolium, 1-cyanopropyl-3-methylimidazolium and 1-benzyl-3-methylimidazolium) dibutyl phosphate ionic liquids were synthesized and used as lubricants for steel/Al alloy. The influence of functional groups on physicochemical properties and tribological properties was investigated and compared with 1-butyl-3-methylimidazolium dibutyl phosphate. As expected, viscosities increase when the functional groups are tethered to imidazolium cations. The tribological properties of the functional ionic liquids with three polar functional groups in cations are improved, especially the anti-wear performance and load-carrying capacity. On the contrary, the ionic liquid with benzyl group in cation shows worse tribological performance. It is considered that the functional groups in the imidazolium cations tune the adsorption of ionic liquids onto the alloy surface, which finally affect the tribological performance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Tribology International Elsevier

Functional alkylimidazolium ionic liquids as lubricants for steel/aluminum contact: Influence of the functional groups on tribological performance

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Publisher
Elsevier
Copyright
Copyright © 2017 Elsevier Ltd
ISSN
0301-679X
eISSN
1879-2464
D.O.I.
10.1016/j.triboint.2017.11.042
Publisher site
See Article on Publisher Site

Abstract

Four different functional alkylimidazolium (1-hydroxyethyl-3-methylimidazolium, 1-carboxyethyl-3-methylimidazolium, 1-cyanopropyl-3-methylimidazolium and 1-benzyl-3-methylimidazolium) dibutyl phosphate ionic liquids were synthesized and used as lubricants for steel/Al alloy. The influence of functional groups on physicochemical properties and tribological properties was investigated and compared with 1-butyl-3-methylimidazolium dibutyl phosphate. As expected, viscosities increase when the functional groups are tethered to imidazolium cations. The tribological properties of the functional ionic liquids with three polar functional groups in cations are improved, especially the anti-wear performance and load-carrying capacity. On the contrary, the ionic liquid with benzyl group in cation shows worse tribological performance. It is considered that the functional groups in the imidazolium cations tune the adsorption of ionic liquids onto the alloy surface, which finally affect the tribological performance.

Journal

Tribology InternationalElsevier

Published: Mar 1, 2018

References

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