Journal
TRIBOLOGY INTERNATIONAL
Volume 159, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.triboint.2021.106880
Keywords
Fluid-like graphene oxide; Nanofluid; Lubricant nanoadditive; Tribological performance
Categories
Funding
- National Natural Science Foundation of China [52075527, 21404114]
- Natural Science Foundation of Ningbo [2019A610028]
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This study developed a fluid-like graphene oxide (FL-GO) that exhibited excellent dispersion ability and tribological behavior in polyethylene glycol (PEG). Experimental results showed that FL-GO significantly reduced wear volume and friction coefficient, potentially improving the friction and wear performance of lubricating oils.
Achieving graphene-based lubricants with simultaneous excellent dispersibility and tribological performance remains challenging as graphene tends to agglomerate in lubricating oils. Herein, a fluid-like graphene oxide (FLGO) was developed based on covalent grafting and epoxide ring-opening reactions, which exhibited obviously improved dispersion ability and tribological behaviors in polyethylene glycol (PEG). The dispersion stability of FL-GO was demonstrated by sedimentation experiment and the 0.5% of FL-GO reduced wear volume of 91.1% and friction coefficient of 43.7%. This well-dispersed graphene helps continue to generate an uneven lubricating film on the rubbing surface, thereby improving the friction and wear performance of the lubricating oils.
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