Triester derivatives of oleic acid: The effect of chemical structure on low temperature, thermo-oxidation and tribological properties

摘要: Abstract Due to the strict regulations imposed on mineral oil-based lubricants because of their non-biodegradable wastes, development and applications biolubricants are increasing daily. Plant oils being investigated as a potential source environmentally favorable biodegradability, renewability, viscosity–temperature relationship, low volatility excellent lubrication performance. However, use plant has some restriction, most critical oxidative stability low-temperature problems. This paper presents systematic modifications improve physicochemical tribological properties oil derivatives. Thin-film micro-oxidation testing pressure differential scanning calorimetry were used compare thermo-oxidative stabilities. The results showed that among oleic acid-based triester compounds, 2-ethylhexyl 9-(myristoxy)-10-(heptanoyloxy)octadecanoate ( 9 ) had lowest pour point (−47.19 °C) while 9-(caprooxy)-10-(heptanoyloxy)octadecanoate 5 highest onset temperature (103.10 °C) amount volatile loss insoluble deposits at 89.17% 78.51%, respectively. Overall, data indicate biolubricant basestocks based this chemical modification offer great for industrial products.