RT Journal Article
T1 Surface tension, wettability and tribological properties of a low viscosity oil using CaCO3 and CeF3 nanoparticles as addiitives
A1 Liñeira del Río, José Manuel
A1 Álvarez Alonso, Alba
A1 García Guimarey, María Jesús
A1 Prado, Jose I.
A1 Fernández Pérez, Josefa
A1 Amigo Pombo, Alfredo José
K1 Lubricantes
K1 Sistemas EV
K1 Nanopartículas
K1 Transmisións
AB The rise of the electric vehicles as a more sustainable transport alternative makes it necessary to study new transmission fluids that adapt to their needs and improve their efficiency. The thermophysical properties (contact angle, surface tension and rheology) and tribological properties (friction and wear) of potential PAO8 transmission nanofluids using CaCO3 and CeF3 nanoparticles as additives are evaluated at mass concentrations of0.05, 0.10, 0.15 and 0.20 wt%. Low contact angle and surface tension values are obtained, indicating good wettability. When the nanoparticles are used as PAO8 additives, small reductions in surface tension are achieved, but no differences in contact angle are observed. All nanolubricants and base oil exhibit Newtonian behavior.Concerning the tribological behavior, reductions in the friction coefficient are achieved for both types of nanoparticles, with the largest reductions comparing to PAO8 base oil being 13 % and 10 % for nanolubricants containing 0.05 wt% CaCO3 and 0.10 wt% CeF3 nanoparticles (NPs), respectively. In terms of antiwear performance, maximum reductions are obtained for the CaCO3 nanolubricant of 28 % (0.15 wt%), 41 % (0.10 wt%)and 59 % (0.15 wt%) and for the CeF3 nanolubricant of 19 % (0.20 wt%), 53 % (0.10 wt%) and 58 % (0.20 wt%) for the parameters of diameter, depth, and area of the worn track, respectively. Through Raman microscopy, the tribological mechanisms of tribofilm formation, repairing, and rolling can be proposed. A discontinuous tribofilm formed by the CaCO3 and CeF3 nanoparticles reduces the contact area between the two surfaces protecting them.
PB Elsevier
SN 0167-7322
YR 2023
FD 2023-09
LK http://hdl.handle.net/10347/32108
UL http://hdl.handle.net/10347/32108
LA eng
NO José M. Liñeira del Río, Alonso Alba, María J.G. Guimarey, Jose I. Prado, Alfredo Amigo, Josefa Fernández, Surface tension, wettability and tribological properties of a low viscosity oil using CaCO3 and CeF3 nanoparticles as additives, Journal of Molecular Liquids, Volume 391, Part A, 2023, 123188, https://doi.org/10.1016/j.molliq.2023.123188.
NO This research is supported by Xunta de Galicia (ED431C 2020/10),by MCIN/AEI/10.13039/501100011033 through the PID2020-112846RB-C22 project. JMLdR is grateful for financial supportthrough the Margarita Salas program, funded by MCIN/AEI/10.13039/501100011033 and “NextGenerationEU/PRTR”. Dr. M.J.G.G. acknowledges a postdoctoral fellowship (ED481B-2019-015) from theXunta de Galicia (Spain). Furthermore, authors are also grateful toREPSOL Lubricants for providing the PAO8 base oil and to RIAIDT-USCfor its analytical facilities.
DS Minerva
RD 29 abr 2026