skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Oil-Miscible and Non-Corrosive Phosphonium Ionic Liquids as Candidate Lubricant Additives

Abstract

Ionic liquids (ILs) have been receiving considerable attention from the lubricants industry as potential friction and wear-reducing additives, but their solubility in oils is an issue. Unlike most ionic liquids that are insoluble in non-polar hydrocarbon oils, this study reports phosphonium-based ILs (PP-ILs) that are fully miscible with both mineral oil-based and synthetic lubricants. Both the cation and anion in quaternary structures, long alkyl chains, and capability of pairing the cation and the anion via a H-O bond are hypothesized to improve the compatibility between ions and neutral oil molecules. The measured viscosities of the oil-IL blends agree well with the Refutas equation that is for solutions containing multiple components. High thermal stability and non-corrosiveness were observed for the PP-ILs. Effective friction reduction and anti-wear functionality have been demonstrated in tribological tests when adding 5 wt% of a PP-IL into a base oil, suggesting potential applications for using the oil-miscible PP-ILs as lubricant additives.

Authors:
 [1];  [1];  [1];  [1];  [1];  [1];  [1];  [1];  [2];  [2]
  1. ORNL
  2. GM R&D and Planning, Warren, Michigan
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1045842
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Wear
Additional Journal Information:
Journal Volume: 289; Journal ID: ISSN 0043-1648
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADDITIVES; ANIONS; CATIONS; CHAINS; COMPATIBILITY; FRICTION; HYDROCARBONS; LUBRICANTS; MOLTEN SALTS; SOLUBILITY; STABILITY; SYNTHETIC MATERIALS

Citation Formats

Yu, Bo, Bansal, Dinesh G, Qu, Jun, Sun, Xiaoqi, Luo, Huimin, Dai, Sheng, Blau, Peter Julian, Bunting, Bruce G, Mordukhovich, Gregory, and Smolenski, Donald. Oil-Miscible and Non-Corrosive Phosphonium Ionic Liquids as Candidate Lubricant Additives. United States: N. p., 2012. Web. doi:10.1016/j.wear.2012.04.015.
Yu, Bo, Bansal, Dinesh G, Qu, Jun, Sun, Xiaoqi, Luo, Huimin, Dai, Sheng, Blau, Peter Julian, Bunting, Bruce G, Mordukhovich, Gregory, & Smolenski, Donald. Oil-Miscible and Non-Corrosive Phosphonium Ionic Liquids as Candidate Lubricant Additives. United States. https://doi.org/10.1016/j.wear.2012.04.015
Yu, Bo, Bansal, Dinesh G, Qu, Jun, Sun, Xiaoqi, Luo, Huimin, Dai, Sheng, Blau, Peter Julian, Bunting, Bruce G, Mordukhovich, Gregory, and Smolenski, Donald. 2012. "Oil-Miscible and Non-Corrosive Phosphonium Ionic Liquids as Candidate Lubricant Additives". United States. https://doi.org/10.1016/j.wear.2012.04.015.
@article{osti_1045842,
title = {Oil-Miscible and Non-Corrosive Phosphonium Ionic Liquids as Candidate Lubricant Additives},
author = {Yu, Bo and Bansal, Dinesh G and Qu, Jun and Sun, Xiaoqi and Luo, Huimin and Dai, Sheng and Blau, Peter Julian and Bunting, Bruce G and Mordukhovich, Gregory and Smolenski, Donald},
abstractNote = {Ionic liquids (ILs) have been receiving considerable attention from the lubricants industry as potential friction and wear-reducing additives, but their solubility in oils is an issue. Unlike most ionic liquids that are insoluble in non-polar hydrocarbon oils, this study reports phosphonium-based ILs (PP-ILs) that are fully miscible with both mineral oil-based and synthetic lubricants. Both the cation and anion in quaternary structures, long alkyl chains, and capability of pairing the cation and the anion via a H-O bond are hypothesized to improve the compatibility between ions and neutral oil molecules. The measured viscosities of the oil-IL blends agree well with the Refutas equation that is for solutions containing multiple components. High thermal stability and non-corrosiveness were observed for the PP-ILs. Effective friction reduction and anti-wear functionality have been demonstrated in tribological tests when adding 5 wt% of a PP-IL into a base oil, suggesting potential applications for using the oil-miscible PP-ILs as lubricant additives.},
doi = {10.1016/j.wear.2012.04.015},
url = {https://www.osti.gov/biblio/1045842}, journal = {Wear},
issn = {0043-1648},
number = ,
volume = 289,
place = {United States},
year = {2012},
month = {1}
}