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Phosphonium-based ionic liquids as grease additives in rolling bearing tests.

Bartolomé, M., Gonçalves, D., García Tuero, A., González, R., Hernández Battez, A. and Seabra, J. H. O., 2023. Phosphonium-based ionic liquids as grease additives in rolling bearing tests. Journal of Molecular Liquids, 382, 122013.

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DOI: 10.1016/j.molliq.2023.122013


Two phosphonium-derived ionic liquids: trihexyltetradecylphosphonium bis(2-ethylhexyl)phosphate (IL1) and trihexyltetradecylphosphonium tricyanomethanide (IL2) were used as additives in lithium complex- (G1) and anhydrous calcium-based (G2) greases at 5 wt%. Friction torque and wear tests were performed using a modified four-ball machine for testing rolling bearings in order to determine the friction and wear reducing properties of these grease samples in a real component. The IL2 improved the friction reduction performance of both greases, especially G1. Both ILs improved the antiwear behaviour of grease G2. Grease G2 showed higher oxidation and thermal ageing levels than G1, but the addition of the ILs, IL2 in particular, improved this issue.

Item Type:Article
Uncontrolled Keywords:Phosphonium ionic liquids; Additive; Greases; Rolling bearings; Friction torque; Wear
Group:Faculty of Science & Technology
ID Code:38658
Deposited By: Symplectic RT2
Deposited On:07 Jun 2023 12:23
Last Modified:07 Jun 2023 12:23


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