RT Journal Article
T1 High-Pressure Thermophysical Properties of Eight Paraffinic, Naphthenic, Polyalphaolefin and Ester Base Oils
A1 Villamayor, Antía
A1 García Guimarey, María Jesús
A1 Mariño Fernández, Fátima
A1 Liñeira del Río, José Manuel
A1 Urquiola, Francisco
A1 Urchegui, Raquel
A1 Fernández Pérez, Josefa
A1 Pérez Comuñas, María José
K1 High pressure
K1 Mineral oils
K1 Synthetic oils
K1 Density
K1 Isothermal compressibility
K1 Thermal expasion coefficient
AB In this work, the thermophysical properties of four mineral (paraffinic and naphthenic)and four synthetic (polyalphaolefin and ester) base oils are measured. Knowledge of these properties is of vital importance for the correct and optimal formulation and design of lubricants, and for the development of equations of state and transport models that adequately represent their properties.Density, isothermal compressibility, thermal expansion coefficient, dynamic viscosity, pressure–viscosity coefficient, and contact angle were determined. To carry out this work, a pρT apparatus, a rotational viscometer, a falling body viscometer, and a contact angle analyzer were used. Highest densities were found for the polyalphaolefin and ester synthetic oils, increasing around 5% from 0.1 to 100 MPa for all the base oils. The density of the synthetic oils is less dependent on temperature changes. For the expansivity and compressibility of all the base oils, decreases with pressure of up to 35% and 45% were observed. From the contact angle measurements, it was observed that base oils with a higher viscosity grade have a worse wetting. The greatest effect of pressure on the dynamicviscosity was obtained for the naphthenic mineral oil and the lowest effect for the polyalphaolefin oil. Paraffinic and naphthenic oils present the highest universal pressure–viscosity coefficients.
PB MDPI
YR 2023
FD 2023-01
LK http://hdl.handle.net/10347/32106
UL http://hdl.handle.net/10347/32106
LA eng
NO Villamayor, A.; Guimarey, M.J.G.; Mariño, F.; Liñeira del Río, J.M.; Urquiola, F.; Urchegui, R.; Comuñas, M.J.P.; Fernández, J. High-Pressure Thermophysical Properties of Eight Paraffinic, Naphthenic, Polyalphaolefin and Ester Base Oils. Lubricants 2023, 11, 55. https://doi.org/10.3390/ lubricants11020055
NO This research was funded by MCIN/AEI/10.13039/501100011033 and by the European Regional Development Fund (ERDF, a way of making Europe) through the ENE2017-86425-C2-2-R andthe PID2020-112846RB-C22 projects as well as by Xunta de Galicia (ED431C 2020/10). José M. Liñeiradel Río acknowledges the grant of the Margarita Salas program, funded byMCIN/AEI/10.13039/501100011033 and “European Union NextGenerationEU/PRTR” María J. G.Guimarey acknowledges a postdoctoral fellowship (ED481B-2019-015) from the Xunta de Galicia (Spain).
DS Minerva
RD 27 abr 2026