Triprotic Ammonium Oleate Ionic Liquid Crystal Lubricant for Copper-Copper Friction and Wear Reduction

The triprotic ammonium carboxylate ionic liquid crystal (2-hydroxyethyl)ammonium oleate (MO) has been studied as a neat lubricant and as a lubricant additive in two base oils, PAO6 and 100N. The lubricants have been used in commercially pure copper-OFHC copper balls on disk reciprocating sliding con...

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Bibliographic Details
Published in:Lubricants 2022-11, Vol.10 (11), p.290
Main Authors: Avilés, María-Dolores, Jiménez, Ana-Eva, Pamies, Ramón, Carrión-Vilches, Francisco-José, Bermúdez, María-Dolores
Format: Article
Language:English
Subjects:
Abrasive wear
additive
Coefficient of friction
Contact angle
Control
Copper
Fatty acids
Friction
Friction reduction
Hydrogen bonds
Ionic liquids
Ions
Liquid crystals
Lubricants
Lubricants & lubrication
lubrication
Lubrication and lubricants
Mechanical properties
Methods
protic ionic liquid
Rheology
Room temperature
Scanning electron microscopy
Sliding contact
Thermogravimetric analysis
Viscosity
Wear mechanisms
Wear rate
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Summary:The triprotic ammonium carboxylate ionic liquid crystal (2-hydroxyethyl)ammonium oleate (MO) has been studied as a neat lubricant and as a lubricant additive in two base oils, PAO6 and 100N. The lubricants have been used in commercially pure copper-OFHC copper balls on disk reciprocating sliding contact at room temperature. Neat MO presents a very good lubricating performance, with a friction coefficient of 0.06 and a wear rate of OFHC copper disk of 4.15 × 10−7 mm3/N·m. These results are, respectively, 94% and 98% lower than those obtained for PAO6, with similar reductions obtained with respect to 100N. MO has also been studied as an additive in 2wt.% proportion. The severe abrasive wear mechanism that takes place in the presence of neat base oils is reduced by the MO additive.
ISSN:2075-4442
2075-4442
DOI:10.3390/lubricants10110290