Synthesis and tribological study of core-shell Ag@polyaniline as lubricant additive in lithium-based complex grease

Abstract

Purpose

The purpose of this paper is to synthesize a kind of core-shell Ag@polyaniline (Ag@PAN) as a lubricant additive to improve the friction reduction and anti-wear abilities of lithium-based complex grease.

Design/methodology/approach

The core-shell Ag@PAN was prepared by a simple method and was introduced into the lithium-based complex grease. The typical properties of Ag@PAN were investigated by scanning electron microscopy (SEM), Fourier transforms infrared spectrometer and thermal gravimetric analyzer. The tribological properties were evaluated under different conditions. After the tribological test, the worn surface was analyzed by SEM and X-ray photoelectron spectroscopy to probe the lubrication mechanisms.

Findings

The prepared Ag@PAN could greatly improve the friction reduction and wear resistance of the friction pair under different conditions. The preferable tribological performances were mainly attributed to the synergism of various lubrication mechanisms including “mending effect,” “rolling effect” and lubricating protective film, and so on.

Originality/value

This study synthesizes a new kind of core-shell Ag@PAN as a lubricant additive, and it possesses preferable friction reduction and anti-wear abilities.

Citation

Xia, Y., Chen, C., Feng, X. and Cao, Z. (2021), "Synthesis and tribological study of core-shell Ag@polyaniline as lubricant additive in lithium-based complex grease", Industrial Lubrication and Tribology, Vol. 73 No. 8, pp. 1091-1097. https://doi.org/10.1108/ILT-10-2020-0385