Heat capacity, density, surface tension, and contact angle for polyalphaolefins and ester lubricants
Por favor, use este identificador para citas ou ligazóns a este ítem:
http://hdl.handle.net/10347/26726
Ficheiros no ítem
Metadatos do ítem
Título: | Heat capacity, density, surface tension, and contact angle for polyalphaolefins and ester lubricants |
Autor/a: | Coelho de Sousa Marques, Mónica Alexandra García Guimarey, María Jesús Domínguez Arca, Vicente Amigo Pombo, Alfredo José Fernández Pérez, Josefa |
Centro/Departamento: | Universidade de Santiago de Compostela. Departamento de Física Aplicada |
Palabras chave: | Polyalphaolefins | Ester-based lubricants | Thermophysical and surface properties | Wetting behaviour | |
Data: | 2021 |
Editor: | Elsevier |
Cita bibliográfica: | Thermochimica Acta 2021, 703: 178994. https://doi.org/10.1016/j.tca.2021.178994 |
Resumo: | 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 |
Versión do editor: | https://doi.org/10.1016/j.tca.2021.178994 |
URI: | http://hdl.handle.net/10347/26726 |
DOI: | 10.1016/j.tca.2021.178994 |
ISSN: | 0040-6031 |
Dereitos: | © 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Attribution-NonCommercial-NoDerivatives 4.0 Internacional |
Coleccións
-
- FA-Artigos [288]
O ítem ten asociados os seguintes ficheiros de licenza: