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Lubricants 2015, 3(4), 637-649;

Ionic Liquids as Additives of Coffee Bean Oil in Steel-Steel Contacts

Mechanical Engineering Department, Rochester Institute of Technology, Kate Gleason College of Engineering, Rochester, NY 14623, USA
Biotechnology and Molecular Bioscience, Rochester Institute of Technology, Thomas Gosnell School of Life Sciences, Rochester, NY 14623, USA
Author to whom correspondence should be addressed.
Academic Editors: Antolin Hernández Battez and Rubén González Rodríguez
Received: 2 September 2015 / Revised: 19 October 2015 / Accepted: 21 October 2015 / Published: 28 October 2015
(This article belongs to the Special Issue Nanoparticles and Ionic Liquids in Lubrication)
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Environmental awareness and ever-growing restrictive regulations over contamination have increased the need for more environmentally-friendly lubricants. Due to their superior biodegradability and lower toxicity, vegetable oils are a good alternative to replace currently-used mineral oils. However, vegetable oils show low oxidation and thermal stability and poor anti-wear properties. Most of these drawbacks can be attenuated through the use of additives. In the last decade, ionic liquids have emerged as high-performance fluids and lubricant additives due to their unique characteristics. In this study, the tribological behavior of two phosphonium-based ionic liquids is investigated as additives of coffee bean oil in steel-steel contact. Coffee bean oil-ionic liquid blends containing 1, 2.5, and 5 wt% of each ionic liquid are studied using a block-on-flat reciprocating tribometer and the test results are compared to commercially-available, fully-formulated lubricant. Results showed that the addition of the ionic liquids to the coffee bean oil reduces wear volume of the steel disks, and wear values achieved are comparable to that obtained when the commercially-available lubricant is used. View Full-Text
Keywords: ionic liquids; additives; wear; friction; biolubricants ionic liquids; additives; wear; friction; biolubricants

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Grace, J.; Vysochanska, S.; Lodge, J.; Iglesias, P. Ionic Liquids as Additives of Coffee Bean Oil in Steel-Steel Contacts. Lubricants 2015, 3, 637-649.

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