Next Article in Journal
Assessing Boundary Film Forming Behavior of Phosphonium Ionic Liquids as Engine Lubricant Additives
Next Article in Special Issue
Towards Phosphorus Free Ionic Liquid Anti-Wear Lubricant Additives
Previous Article in Journal
Pleural Lubrication
Previous Article in Special Issue
The Lubrication Ability of Ionic Liquids as Additives for Wind Turbine Gearboxes Oils
Article Menu

Export Article

Open AccessArticle
Lubricants 2016, 4(2), 16; doi:10.3390/lubricants4020016

Theoretical and Experimental Study of the Friction Behavior of Halogen-Free Ionic Liquids in Elastohydrodynamic Regime

Mechanical Engineering Department, Kate Gleason College of Engineering, Rochester Institute of Technology, Rochester, NY 14623, USA
*
Author to whom correspondence should be addressed.
Academic Editors: Antolin Hernández Battez and Rubén González Rodríguez
Received: 31 March 2016 / Revised: 8 May 2016 / Accepted: 11 May 2016 / Published: 19 May 2016
(This article belongs to the Special Issue Nanoparticles and Ionic Liquids in Lubrication)
View Full-Text   |   Download PDF [2310 KB, uploaded 19 May 2016]   |  

Abstract

Ionic Liquids have emerged as effective lubricants and additives to lubricants, in the last decade. Halogen-free ionic liquids have recently been considered as more environmentally stable than their halogenated counterparts, which tend to form highly toxic and corrosive acids when exposed to moisture. Most of the studies using ionic liquids as lubricants or additives of lubricants have been done experimentally. Due to the complex nature of the lubrication mechanism of these ordered fluids, the development of a theoretical model that predicts the ionic liquid lubrication ability is currently one of the biggest challenges in tribology. In this study, a suitable and existing friction model to describe lubricating ability of ionic liquids in the elastohydrodynamic lubrication regime is identified and compared to experimental results. Two phosphonium-based, halogen-free ionic liquids are studied as additives to a Polyalphaolefin base oil in steel–steel contacts using a ball-on-flat reciprocating tribometer. Experimental conditions (speed, load and roughness) are selected to ensure that operations are carried out in the elastohydrodynamic regime. Wear volume was also calculated for tests at high speed. A good agreement was found between the model and the experimental results when [THTDP][Phos] was used as an additive to the base oil, but some divergence was noticed when [THTDP][DCN] was added, particularly at the highest speed studied. A significant decrease in the steel disks wear volume is observed when 2.5 wt. % of the two ionic liquids were added to the base lubricant. View Full-Text
Keywords: ionic liquids; halogen-free; friction; elastohydrodynamic; wear ionic liquids; halogen-free; friction; elastohydrodynamic; wear
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).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Janardhanan, K.; Iglesias, P. Theoretical and Experimental Study of the Friction Behavior of Halogen-Free Ionic Liquids in Elastohydrodynamic Regime. Lubricants 2016, 4, 16.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Lubricants EISSN 2075-4442 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top