Ionic liquids containing symmetric quaternary phosphonium cations and phosphorus-containing anions, and their use as lubricant additives
An ionic liquid composition having the following generic structural formula: ##STR00001## wherein R1, R2, R3, and R4 are equivalent and selected from hydrocarbon groups containing at least three carbon atoms, and X- is a phosphorus-containing 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 oil, wherein the ionic liquid is dissolved in the base oil. 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):
- 9,957,460
- Application Number:
- 14/184,754
- OSTI ID:
- 1439419
- Country of Publication:
- United States
- Language:
- English
Oil-miscible and non-corrosive phosphonium-based ionic liquids as candidate lubricant additives
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journal | June 2012 |
Antiwear Performance and Mechanism of an Oil-Miscible Ionic Liquid as a Lubricant Additive
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journal | February 2012 |
Comparison of an oil-miscible ionic liquid and ZDDP as a lubricant anti-wear additive
|
journal | March 2014 |
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