Tribological behavior of oils additised with a phosphonium-derived ionic liquid compared to a commercial oil

Purpose The purpose of this paper is to study the antifriction, antiwear and tribolayer formation properties of the trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ionic liquid (IL) as additive at 1 wt.% in two base oils and their mixtures, comparing the results with those of a...

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Bibliographic Details
Published inIndustrial lubrication and tribology Vol. 73; no. 1; pp. 137 - 144
Main Authors Bartolomé Sáez, Marlene, Hernández Battez, Antolin E, Espina Casado, Jorge, Viesca Rodríguez, José L, Fernández-González, Alfonso, González Rodriguez, Rubén
Format Journal Article
LanguageEnglish
Published Bradford Emerald Publishing Limited 01.02.2021
Emerald Group Publishing Limited
Subjects
Additives
Antifriction
Elastohydrodynamic lubrication
Friction
Ionic liquids
Lubricants & lubrication
Microscopy
Mineral oils
Temperature
Tribology
Viscosity
Antifriction
Phosphonium-derived ionic liquid
Additive
Antiwear
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Summary:Purpose The purpose of this paper is to study the antifriction, antiwear and tribolayer formation properties of the trihexyltetradecylphosphonium bis(2,4,4-trimethylpentyl) phosphinate ionic liquid (IL) as additive at 1 wt.% in two base oils and their mixtures, comparing the results with those of a commercial oil. Design/methodology/approach The mixture of the base oils used in the formulation of the commercial oil SAE 0W20 plus the IL was tested under rolling/sliding and reciprocating conditions to determine the so-called Stribeck curve, the tribolayer formation and the antifriction and antiwear behaviors. Findings The use of this IL as additive in these oils does not change their viscosity; improves the antifriction and antiwear properties of the base oils, making equal or outperforming these properties of the SAE 0W20; and the thickness and formation rate of the tribolayer resulting from the IL-surface interaction is highly dependent on the type of base oil and influence on the friction and wear results. Originality/value The use of this IL allows to replace partial or totally commercial antifriction and antiwear additives. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-05-2020-0179/
ISSN:0036-8792
1758-5775
DOI:10.1108/ILT-05-2020-0179