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Graphene-Ionic Liquid Thin Film Nanolubricant

Group of Materials Science and Metallurgical Engineering, Technical University of Cartagena, Campus Muralla del Mar, 30202 Cartagena, Spain
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Nanomaterials 2020, 10(3), 535; https://doi.org/10.3390/nano10030535
Received: 17 February 2020 / Revised: 6 March 2020 / Accepted: 10 March 2020 / Published: 17 March 2020
Graphene (0.5 wt.%) was dispersed in the hydrophobic room-temperature ionic liquid 1-octyl-3-methylimidazolium bis(trifluoromethanesulfonyl) imide (IL) to obtain a new non-Newtonian (IL + G) nanolubricant. Thin layers of IL and (IL + G) lubricants were deposited on stainless steel disks by spin coating. The tribological performance of the new thin layers was compared with those of full fluid lubricants. Friction coefficients for neat IL were independent of lubricant film thickness. In contrast, for (IL + G) the reduction of film thickness not only afforded 40% reduction of the friction coefficient, but also prevented wear and surface damage. Results of surface profilometry, scanning and transmission electron microscopy (SEM and TEM), energy dispersive analysis (EDX), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy were discussed. View Full-Text
Keywords: graphene; ionic liquid; thin film; spin coating graphene; ionic liquid; thin film; spin coating
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MDPI and ACS Style

Avilés, M.-D.; Pamies, R.; Sanes, J.; Bermúdez, M.-D. Graphene-Ionic Liquid Thin Film Nanolubricant. Nanomaterials 2020, 10, 535.

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