Affiliation:
1. Guangxi University School of Mechanical Engineering, , Nanning 530004 , China
2. Guangxi University Collaborative Innovation Center of Sustainable Energy Materials, School of Physical Science and Technology, , Nanning 530004 , China
Abstract
Abstract
The restricted adsorption capacity of ordinary graphene at high temperature limits its application in engine lubrication. To address this, nitrogen-doped element-modified graphene with strong adsorption and superior lubricating properties is prepared by a bottom-up chemical strategy in this study. The reciprocating tribometer is aimed at simulating the piston operating environment to determine the lubrication performance of nitrogen-doped graphene. The characterization and analysis of the wear marks are performed by means of depth-of-field microscope, scanning electron microscope, energy dispersive spectrometer, and other instruments. The experimental data demonstrate that the friction-reduction and anti-wear properties of PAO 6 base oil are enhanced by 22.4% and 56.9% (100 °C), respectively, after the addition of 0.4 wt% nitrogen-doped graphene. Besides, the abrasive and adhesive wear are significantly reduced, which are attributed to its inter-layer slip along the sliding direction and superior adsorption performance. Finally, the interfacial lubrication mechanism of lubricant protective film under high-temperature conditions is revealed.
Funder
National Natural Science Foundation of China
Natural Science Foundation of Guangxi Province
Subject
Surfaces, Coatings and Films,Surfaces and Interfaces,Mechanical Engineering,Mechanics of Materials
Cited by
5 articles.
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