| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 614832 | Tribology International | 2014 | 11 Pages |
Abstract
The tribological performance of three ionic liquids (ILs) containing the same cation, 1-butyl-1-methylpyrrolidinium [C4C1Pyrr]+, and the anions tetracyanoborate [B(CN)4]â, trifluoromethanesulphonate [CF3SO3]â and tris(pentafluoroethyl)trifluorophosphate [(C2F5)3PF3]â were analyzed. A reciprocating ball-on-plate tribometer was used at room temperature and under loads of 14, 18, 22 and 26Â N. Two perfluoropolyethers were chosen as reference oils. [C4C1Pyrr][CF3SO3] showed the most significant friction reduction. Nevertheless, its anti-wear performance was, in general, worse than that of [C4C1Pyrr][(C2F5)3PF3], which led to comparable or lower wear than the corresponding reference oil. [C4C1Pyrr][B(CN)4] showed poorer tribological properties than the other ILs. XPS analyses on the worn surfaces lubricated with [C4C1Pyrr][CF3SO3] or [C4C1Pyrr][(C2F5)3PF3] revealed that nitrates and nitrogen oxides were tribochemically formed from the cation, whereas the anion was mainly adsorbed.
Related Topics
Physical Sciences and Engineering
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Authors
Inés Otero, Enriqueta R. López, Manuela Reichelt, Josefa Fernández,