A Presentation of Ionic Liquids as Lubricants: Some Critical Comments
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CNR-ISMN, Via Salaria km 29.300, 00015 Monterotondo Stazione, RM, Italy
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“Coriolan Drăgulescu” Institute of Chemistry, Romanian Academy, 24 Mihai Viteazu Bvd., 300223 Timişoara, Romania
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CNR-Istituto per i Processi Chimico-Fisici, 98158 Messina, ME, Italy
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Dipartimento di Chimica e Tecnologie Chimiche, Università della Calabria, Via P. Bucci, Cubo 12/C, 87036 Arcavacata di Rende, CS, Italy
*
Authors to whom correspondence should be addressed.
Academic Editor: Cezary Czaplewski
Appl. Sci. 2021, 11(12), 5677; https://doi.org/10.3390/app11125677
Received: 14 May 2021
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Revised: 15 June 2021
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Accepted: 15 June 2021
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Published: 19 June 2021
(This article belongs to the Special Issue Self-Assembly in Chemistry and Supramolecular Chemistry)
Ionic liquids (ILs) are liquid materials at room temperature with an ionic intrinsic nature. The electrostatic interactions therefore play a pivotal role in dictating their inner structure, which is then expected to be far from the traditional pattern of classical simple liquids. Therefore, the strength of such interactions and their long-range effects are responsible for the ionic liquid high viscosity, a fact that itself suggests their possible use as lubricants. More interestingly, the possibility to establish a wide scenario of possible interactions with solid surfaces constitutes a specific added value in this use. In this framework, the ionic liquid complex molecular structure and the huge variety of possible interactions cause a complex aggregation pattern which can depend on the presence of the solid surface itself. Although there is plenty of literature focusing on the lubricant properties of ionic liquids and their applications, the aim of this contribution is, instead, to furnish to the reader a panoramic view of this exciting problematic, commenting on interesting and speculative aspects which are sometimes neglected in standard works and trying to furnish an enriched vision of the topic. The present work constitutes an easy-to-read critical point of view which tries to interact with the imagination of readers, hopefully leading to the discovery of novel aspects and interconnections and ultimately stimulating new ideas and research.
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Keywords:
lubricants; ionic liquids; self-assembly
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MDPI and ACS Style
Calandra, P.; Szerb, E.I.; Lombardo, D.; Algieri, V.; De Nino, A.; Maiuolo, L. A Presentation of Ionic Liquids as Lubricants: Some Critical Comments. Appl. Sci. 2021, 11, 5677. https://doi.org/10.3390/app11125677
AMA Style
Calandra P, Szerb EI, Lombardo D, Algieri V, De Nino A, Maiuolo L. A Presentation of Ionic Liquids as Lubricants: Some Critical Comments. Applied Sciences. 2021; 11(12):5677. https://doi.org/10.3390/app11125677
Chicago/Turabian StyleCalandra, Pietro, Elisabeta I. Szerb, Domenico Lombardo, Vincenzo Algieri, Antonio De Nino, and Loredana Maiuolo. 2021. "A Presentation of Ionic Liquids as Lubricants: Some Critical Comments" Applied Sciences 11, no. 12: 5677. https://doi.org/10.3390/app11125677
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