RT Journal Article
T1 Heat capacity, density, surface tension, and contact angle for polyalphaolefins and ester lubricants
A1 Coelho de Sousa Marques, Mónica Alexandra
A1 García Guimarey, María Jesús
A1 Domínguez Arca, Vicente
A1 Amigo Pombo, Alfredo José
A1 Fernández Pérez, Josefa
K1 Polyalphaolefins
K1 Ester-based lubricants
K1 Thermophysical and surface properties
K1 Wetting behaviour
AB Thermophysical properties of lubricants are important to understand which ones are appropriated for the industrial conditions expected. Thermophysical properties of two different families of lubricants were analysed: polyalphaolefins (PAO6, PAO20, PAO32 and PAO40) and four ester-based lubricants. Specific heat capacity, density, surface tension, and contact angle were experimentally determined over a broad temperature range through methods such as μDSC, U-tube vibration, drop volume, and sessile drop method, respectively. A clear difference between the two families was observed due to their structure and composition, grouping by nature. Ester-based lubricants showed lower specific heat capacity but higher surface tension and density than polyalphaolefins. PAO6 clearly has the lowest density and surface tension and presents the highest specific heat capacity of all lubricants, and together with trimethylolpropane trioleate, TMPTO, presents the best wettability. Heat capacity values were used to test the validity of two predictive methods
PB Elsevier
SN 0040-6031
YR 2021
FD 2021
LK http://hdl.handle.net/10347/26726
UL http://hdl.handle.net/10347/26726
LA eng
NO Thermochimica Acta 2021, 703: 178994. https://doi.org/10.1016/j.tca.2021.178994
NO This work was supported by MINECO and the ERDF program through ENE2017-86425-C2-2-R project, and by Xunta de Galicia (ED431E 2018/08, and GRC ED431C 2020/10). M.A.C.S.M. acknowledges the Erasmus program for funding the researcher stay at the Santiago de Compostela University. M.J.G.G. thanks Xunta de Galicia (Spain) the support through a Postdoctoral Fellowship (ED481B-2019-015)
DS Minerva
RD 24 abr 2026