Synthesis and Frictional Characteristics of Bio-Based Lubricants Obtained from Fatty Acids of Castor Oil

The depletion of oil reserves and concerns about the environmental impact use incorrect disposal mineral lubricants have been promoting development bio-based lubricants. In this study, biolubricants obtained from fatty acids castor were synthesized by esterification (>wt.%93), epoxidation (>wt.%92), oxirane ring opening reactions using water (>wt.%92) or 2-ethylhexanol (>wt.%94) as nucleophilic agents. frictional characteristics samples through tribological tests performed in a four-ball tester compared with commercial oil. sample showed best performance (FC = 0.0699 ± 0.0007) among prepared samples, equivalent wear rate (WSD 281.2 5.54 μm) ca. 20% lower friction coefficient when to oil, indicating its great potential for replacing fossil oils.