Abstract
The global point of view associated with bio-lubricants has dramatically changed due to depleting petroleum supplies, volatile prices, growing environmental concerns, and strict government regulations. Vegetable oils are considered a potential replacement for petroleum-based lubricants; however, they are constrained by poor cold-flow characteristics, low hydrolytic stability, and low resistance to oxidative deterioration. Increased oxidative and hydrolytic stability and enhanced cold flow properties result from a chemical alteration of vegetable oil by esterification or estolide formation. This work prepares a 12-hydroxystearic acid estolide (HSAE) series, followed by esterification with alcohols (i.e., 2-ethyl hexanol, trimethylolpropane, and pentaerythritol) to obtain estolide esters. The effect of reaction time on the degree of oligomerization of 12-hydroxystearic acid estolide has been studied. Further, the comparative analysis of the physicochemical properties (i.e., kinematic viscosity at 40 °C & 100 °C, viscosity index, and pour point) of estolide esters was also evaluated to study the effect of oligomerization and molecular structure of alcohol on kinematic viscosity, viscosity index, and pour point.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
