2026-05-30T07:52:07Zhttps://riuma.uma.es/rest/oai/request

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

00925njm 22002777a 4500 dc Paulo Roberto, Campos Flexa Ribeiro Filho author Rocha do Nascimento, Matheus author Otaviano da Silva, Silvia Shelly author Murilo Tavares de Luna, Francisco author Rodríguez-Castellón, Enrique author Loureiro Cavalcante, Célio author 2023-01-31 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. 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 Quimica Inorgánica Synthesis and Frictional Characteristics of Bio-Based Lubricants Obtained from Fatty Acids of Castor Oil