2026-06-01T18:11:04Zhttps://riuma.uma.es/rest/oai/request

oai:riuma.uma.es:10630/260922026-02-03T11:03:48Zcom_10630_2254col_10630_37953

Synthesis and Frictional Characteristics of Bio-Based Lubricants Obtained from Fatty Acids of Castor Oil Paulo Roberto, Campos Flexa Ribeiro Filho Rocha do Nascimento, Matheus Otaviano da Silva, Silvia Shelly Murilo Tavares de Luna, Francisco Rodríguez-Castellón, Enrique Loureiro Cavalcante, Célio Quimica Inorgánica 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. 2023-03-06T13:15:34Z 2023-03-06T13:15:34Z 2023-01-31 journal article Campos Flexa Ribeiro Filho, P.R.; Rocha do Nascimento, M.; Otaviano da Silva, S.S.; Tavares de Luna, F.M.; Rodríguez-Castellón, E.; Loureiro Cavalcante, C., Jr. Synthesis and Frictional Characteristics of Bio-Based Lubricants Obtained from Fatty Acids of Castor Oil. Lubricants 2023, 11, 57. https://doi.org/10.3390/lubricants11020057 https://hdl.handle.net/10630/26092 https://doi.org/10.3390/lubricants11020057 eng http://creativecommons.org/licenses/by/4.0/ open access Atribución 4.0 Internacional IOAP-MDPI