RT Journal Article
T1 Tribological and Thermophysical Properties of Environmentally-Friendly Lubricants Based on Trimethylolpropane Trioleate with Hexagonal Boron Nitride Nanoparticles as an Additive
A1 Liñeira del Río, José Manuel
A1 García Guimarey, María Jesús
A1 Pérez Comuñas, María José
A1 López Iglesias, Enriqueta
A1 Prado, José I.
A1 Lugo, Luis
A1 Fernández Pérez, Josefa
K1 Trimethylolpropane trioleate ester
K1 H-BN nanoparticles
K1 Friction
K1 Wear
K1 Viscosity
AB Dispersions based on hexagonal boron nitride, h-BN, nanoparticles, at 0.50, 0.75 and 1.0 wt.% mass concentrations, in an ester base oil composed mainly of trimethylolpropane trioleate, were investigated as potential nanolubricants. The stability of the dispersions was assessed to determine the reliability of the tribological, thermophysical and rheological measurements. Density and viscosity were measured from 278.15 to 373.15 K, while rheological behavior was analyzed at shear rates from 1 to 1000 s−1 at 283.15 K. Newtonian behavior was exhibited by all nanolubricants at the explored conditions, with the exception of the highest concentration at the lowest shear rates, where possible non-Newtonian behavior was observed. Tribological tests were performed under a normal load of 2.5 N. Wear was evaluated by means of a 3D profiler, scanning electron microscopy and confocal Raman microscopy. The best tribological performance was achieved by the 0.75 wt.% nanolubricant, with reductions of 25% in the friction coefficient, 9% in the scar width, 14% in the scar depth, and 22% of the transversal area, all with respect to the neat oil. It was observed that physical protective tribofilms are created between rubbing surfaces.
PB MDPI
YR 2019
FD 2019
LK http://hdl.handle.net/10347/21204
UL http://hdl.handle.net/10347/21204
LA eng
NO Liñeira del Río, J.M., Guimarey, M.J.G., Comuñas, M.J.P. et al. (2019). Tribological and Thermophysical Properties of Environmentally-Friendly Lubricants Based on Trimethylolpropane Trioleate with Hexagonal Boron Nitride Nanoparticles as an Additive. "Coatings", 9(8), 509
NO This work was supported by the Spanish Ministry of Economy and Competitiveness and the ERDF programme through the ENE2014-55489-C2-1/2-R and ENE2017-86425-C2-1/2-R projects. Moreover, this work was funded by the Xunta de Galicia (ED431E 2018/08, GRC ED431C 2016/001 and GRC ED431C 2016-034). These three funders also financed the acquisition of the 3D Optical Profile Sensofar S Neox (UNST15-DE-3156)
DS Minerva
RD 23 abr 2026