In order to further enhance the tribological performance of a polyimide composite subjected to water lubrication rubbing with stainless steel, functionalized mesoporous SiO2 nanoparticles were blended into water as a new lubrication additive. Novel poly (1-(4-vinylbenzyl)-3-methylimidazolium chloride) IL was synthesized and grafted onto mesoporous SiO2 (SiO2-IL) via an atom transfer radical polymerization route. It was demonstrated that SiO2-IL as water additives significantly reduced the friction coefficient and wear of the polyimide composite. Comprehensive analyses of the worn surfaces indicated that the grafted IL layer facilitated the formation of a protective tribofilm, separating the direct rubbing and alleviating tribo-oxidation of the steel surface. This work proposed a new route for enhancing water lubricated polymer-metal rubbing pairs.
Tribology International – Elsevier
Published: Mar 1, 2018
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