Fluorographene with Narrow Lateral Size and Thickness Distributions Prepared for Enhancing Lubrication Performance of Bentonite Grease

Abstract

Fluorographene (FG) with narrow lateral size and thickness distributions was prepared by a liquid-phase exfoliation method, based on liquid cascade centrifugation. The Rtec MFT-5000 tribo-meter was used to investigate the lubricating performance of bentonite grease enhanced by the as-prepared FG. The results showed that the coefficient of friction and the wear volume of bentonite grease with 0.3 wt% FG were decreased by 20.4% and 44.9%, respectively, as compared to those of the base grease. The main reason is that FG can promote the formation of the tribo-chemical reaction film consisting of complex carbon oxide, Fe₂O₃ and FeF₃ on the friction surface, which can remarkably improve the performance of friction reduction and prevent the appearance of severe wear.

Keywords

fluorographene / liquid-phase exfoliation / bentonite grease / lubrication performance

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