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Title: Ionic Liquids with Ammonium Cations as Lubricants or Additives

Abstract

Friction and wear are estimated to cost 6% of the US gross national product, or around $700 billion annually. A new class of more effective lubricants could lead to huge energy savings. Limited recent literature has suggested potential for using room-temperature ionic liquids as lubricants, however only a few out of millions (or more) of species have been evaluated. Recent ORNL work discovered a new category of ionic liquids with ammonium cations that have demonstrated promising lubricating properties as net lubricants or lubricant additives, particularly in lubricating difficult-to-lubricate metals like aluminum. More than 30% friction reduction has been observed on ammonium-based ionic liquids compared to conventional hydrocarbon oils. The inherent polarity of ionic liquids is believed to provide strong adhesion to contact surfaces and form a boundary lubricating film leading to friction and wear reductions. Other advantages of ionic liquids include (1) negligible volatility, (2) high thermal stability, (3) non-flammability, and (4) better intrinsic properties that eliminate the necessity of many expensive lubricant additives. With very flexible molecular structures, this new class of lubricants, particularly ammonium-based ionic liquids, can be tailored to fit a big variety of applications including but not limited to bearings, combustion engines, MEMS, and metal forming.

Authors:
 [1];  [1];  [1];  [1];  [1]
  1. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Laboratory Directed Research and Development (LDRD) Program
OSTI Identifier:
1003502
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Tribology Letters; Journal Volume: 22; Journal Issue: 3
Country of Publication:
United States
Language:
English
Subject:
29 ENERGY PLANNING, POLICY AND ECONOMY; ADDITIVES; ADHESION; ALUMINIUM; BEARINGS; CATIONS; COMBUSTION; ENGINES; FRICTION; GROSS NATIONAL PRODUCT; HYDROCARBONS; LUBRICANTS; LUBRICATION; MOLECULAR STRUCTURE; ORNL; STABILITY; VOLATILITY

Citation Formats

Qu, Jun, Blau, Peter Julian, Dai, Sheng, Luo, Huimin, and Truhan, Jr., John J. Ionic Liquids with Ammonium Cations as Lubricants or Additives. United States: N. p., 2006. Web. doi:10.1007/s11249-006-9081-0.
Qu, Jun, Blau, Peter Julian, Dai, Sheng, Luo, Huimin, & Truhan, Jr., John J. Ionic Liquids with Ammonium Cations as Lubricants or Additives. United States. doi:10.1007/s11249-006-9081-0.
Qu, Jun, Blau, Peter Julian, Dai, Sheng, Luo, Huimin, and Truhan, Jr., John J. Sun . "Ionic Liquids with Ammonium Cations as Lubricants or Additives". United States. doi:10.1007/s11249-006-9081-0.
@article{osti_1003502,
title = {Ionic Liquids with Ammonium Cations as Lubricants or Additives},
author = {Qu, Jun and Blau, Peter Julian and Dai, Sheng and Luo, Huimin and Truhan, Jr., John J},
abstractNote = {Friction and wear are estimated to cost 6% of the US gross national product, or around $700 billion annually. A new class of more effective lubricants could lead to huge energy savings. Limited recent literature has suggested potential for using room-temperature ionic liquids as lubricants, however only a few out of millions (or more) of species have been evaluated. Recent ORNL work discovered a new category of ionic liquids with ammonium cations that have demonstrated promising lubricating properties as net lubricants or lubricant additives, particularly in lubricating difficult-to-lubricate metals like aluminum. More than 30% friction reduction has been observed on ammonium-based ionic liquids compared to conventional hydrocarbon oils. The inherent polarity of ionic liquids is believed to provide strong adhesion to contact surfaces and form a boundary lubricating film leading to friction and wear reductions. Other advantages of ionic liquids include (1) negligible volatility, (2) high thermal stability, (3) non-flammability, and (4) better intrinsic properties that eliminate the necessity of many expensive lubricant additives. With very flexible molecular structures, this new class of lubricants, particularly ammonium-based ionic liquids, can be tailored to fit a big variety of applications including but not limited to bearings, combustion engines, MEMS, and metal forming.},
doi = {10.1007/s11249-006-9081-0},
journal = {Tribology Letters},
number = 3,
volume = 22,
place = {United States},
year = {Sun Jan 01 00:00:00 EST 2006},
month = {Sun Jan 01 00:00:00 EST 2006}
}