Ionic liquids containing quaternary ammonium and phosphonium cations, and their use as environmentally friendly lubricant additives
An ionic liquid composition having the following generic structural formula: wherein Z is N or P, and R1, R2, R3, and R4 are independently selected from hydrogen atom and hydrocarbon groups having one to four carbon atoms with optional interconnection to form a cyclic group that includes Z, and wherein R1, R2, R3, and R4 are all hydrocarbon groups when Z is P, and X− is a phosphorus-containing or carboxylate anion, particularly an organophosphate, organophosphonate, or organophosphinate anion, or a thio-substituted analog thereof containing hydrocarbon groups with at least three carbon atoms. Also described are lubricant compositions comprising the above ionic liquid and a base lubricant, wherein the ionic liquid is dissolved in the base lubricant. Further described are methods for applying the ionic liquid or lubricant composition onto a mechanical device for which lubrication is beneficial, with resulting improvement in friction reduction, wear rate, and/or corrosion inhibition.
- Research Organization:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC05-00OR22725
- Assignee:
- UT-Battelle, LLC (Oak Ridge, TN)
- Patent Number(s):
- 11,760,766
- Application Number:
- 17/078,668
- OSTI ID:
- 2222334
- Country of Publication:
- United States
- Language:
- English
Development of ecofriendly/biodegradable lubricants: An overview
|
journal | January 2012 |
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