| Autor: |
Campos Flexa Ribeiro Filho, Paulo Roberto, Rocha do Nascimento, Matheus, Otaviano da Silva, Silvia Shelly, Tavares de Luna, Francisco Murilo, Rodríguez-Castellón, Enrique, Loureiro Cavalcante Jr., Célio |
| Předmět: |
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| Zdroj: |
Lubricants (2075-4442); Feb2023, Vol. 11 Issue 2, p57, 12p |
| Abstrakt: |
The depletion of oil reserves and concerns about the environmental impact of the use and incorrect disposal of mineral lubricants have been promoting the development of bio-based lubricants. In this study, biolubricants obtained from fatty acids of castor oil were synthesized by esterification (>wt.%93), epoxidation (>wt.%92), and oxirane ring opening reactions using water (>wt.%92) or 2-ethylhexanol (>wt.%94) as nucleophilic agents. The frictional characteristics of the synthesized samples were obtained through tribological tests performed in a four-ball tester and compared with a commercial mineral oil. The sample obtained through oxirane ring opening with water showed the best frictional performance (FC = 0.0699 ± 0.0007) among the prepared samples, with equivalent wear rate (WSD = 281.2 ± 5.54 μm) and ca. 20% lower friction coefficient when compared to the commercial mineral oil, indicating its great potential for replacing mineral fossil oils. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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