A Green Way for theSynthesis of Ester Oil by an Ionic Liquid as Both a Catalyst and LubricantAdditive

Abstract

A series of ionic liquids 1-alkyl-3-methylim idazolebis(2-ethylhexyl) phosphate, were prepared, and the catalytic performance ofionic liquids was evaluated through the esterification reaction ofpentaerythrotol and hexanoic acid at a stoichiometric ratio as a modelreaction. The results showed that the [BMIM][DEHP] and [HMIM][DEHP] exhibitedgood catalytic activity. The [HMIM][DEHP] was chosen as a lubricant additive tofurther investigate the tribological properties after the reaction, and theresults for both COF and WSD and wear volume indicate that the introduction of[HMIM][DEHP] has improved the friction reducing and anti-wear properties ofpentaerythrotol tetra-hexanoate.

Keywords

Ionic liquid / Catalytic / Lubricant / Pentaerythrotol / Additive

Supplementary Materials

The following supporting information can be found at: https://www.sciepublish.com/article/pii/663. Figure S1: The ¹H NMR spectra of [HMIM][DEHP]; Figure S2: The ¹³C NMR spectra of [HMIM][DEHP]; Figure S3: The ¹H NMR spectra of PETH + [HMIM][DEHP]. Table S1: The vendors and quality or grade of chemicals.

Acknowledgments

We express our thanks for funding support from the Smart Grid-National Science and Technology Major Project (grant No. 2024ZD0803200).

Author Contributions

Experimental designing, data collection and analysis, writing manuscript, Y.W.; supervision, H.S. and C.J.; formal analysis, Q.Z. (Qin Zhao); investigation, Q.Z. (Qilong Zhao); editing, W.L.; conceptualization, Q.J. All authors have read and agreed to the published version of the manuscript.

Ethics Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Data will be made available on request.

Funding

This work is supported by the Smart Grid-National Science and Technology Major Project (grant No. 2024ZD0803200).

Declaration of Competing Interest

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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