Tribological properties and synergistic effects of ionic liquids and silver complexes

Abstract

Purpose

The purpose of this paper is to solve the abrupt deterioration of lubricant performance in high-temperature conditions.

Design/methodology/approach

Three silver pyrazolyl methyl pyridine complexes with different morphologies were synthesized. A four-ball tribometer was used to assess the tribological characteristics as an additive for pentaerythritol oleate both independently and compound with 1-hexyl-3-methylimidazolium bis(trifluoromethane sulfonyl)imide.

Findings

The results showed that when silver complexes and ionic liquids (IL) act independently, sheet silver complex 1 and rod silver complex 2 exhibit good lubricating performance; the optimal antifriction concentration of the ILs is 0.25 Wt.%. The tribological results of the compounds additive of ILs and silver complexes indicate that the wear scar diameter of compound 1 decreased by 16.914%, the wear volume reduced by 7.44% and the lubrication effect surpassed that of the two substances individually; rod compound 2 exhibited an antagonistic effect, intensifying wear; compound 3’s lubrication effect fell between that of the two individual components.

Originality/value

The compound of sheet silver complexes and ILs effectively solves the agglomeration problem of micro/nano lubricant additives. When the interface fails, self-repair is completed, improving the stability and antiwear performance of the lubricating oil.

Peer review

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2024-0128

Citation

Sun, L., Jin, C., Tang, X., Cao, K., Wang, S. and Hu, N. (2024), "Tribological properties and synergistic effects of ionic liquids and silver complexes", Industrial Lubrication and Tribology, Vol. 76 No. 6, pp. 842-851. https://doi.org/10.1108/ILT-04-2024-0128