Submitted to: Book Chapter
Publication Type: Book / Chapter
Publication Acceptance Date: 6/9/2014
Publication Date: 11/3/2014
Citation: Harry-O'kuru, R.E., Biresaw, G. 2015. Lubricity characteristics of seed oils modified by acylation. In: Liu, Z., Kraus, G., editors. Green Materials from Plant Oils. lst edition. Cambridge, UK: RSC Publishing. p. 242-268.
Technical Abstract: Chemically modified seed oils via acylation of epoxidized and polyhydroxylated derivatives were investigated for their potential as candidates for lubrication. The native oil was preliminarily epoxidized and ring-opened in a one-pot reaction using formic acid-H2O2 followed by aqueous HCl treatment to give the polyhydroxy intermediate. The latter was then acylated with C-2 to C-5 anhydrides to avail the poly-acetyl, poly-butyroyl and poly-pentanoyl esters of the oil. Using oxirane as a starting material, the vicinal polyformates were generated. A tribological study of these seed oil derivatives exhibited low coefficient of friction as well as low wear scar in the 4-ball tribometric tests.