Study of jojoba oil aging by FTIR

Lubricating and Waxy Esters. VI. Effect of Symmetry about Ester on Crystallization of Linear Monoester Isomers

“…Furthermore, the relative magnitude of these events did not change significantly with cooling rate. For instance, the enthalpy of the leading exotherm in both JLE-28 1 and JLE-28 2 was about 5%-10% of the total at all the cooling rates used. The DSC results indicate that the fundamental behavior and transformation path of the JLEs were not altered significantly by cooling rate.…”

“…They possess unique properties suitable for a wide variety of applications ranging from lubricants to cosmetics, medical formulations, and foods [1]. Monoesters, such as those found in jojoba oil, are known to be very functional as lubricants and performance waxes [2,3]. They are a particularly interesting family of compounds which can be exploited to custom design novel functional materials.…”

“…Their thermal and flow behavior was well correlated to the structural complexity of the molecule (position of the central cis-double bond relative to the C-O-C bond of the ester group and rotations hindrance). In the present work, the phase trajectories and polymorphism of JLE-28 1 and JLE-28 2 were investigated on a conventional X-ray diffractometer by temperature-time resolved XRD during stepped isothermal crystallization, and during cooling from the melt at a constant rate.…”

“…We have recently reported on the synthesis, crystallization and melting behavior, solid content evolution and rheology of three pure jojoba-like esters (JLE) incorporating either 1-decenoic acid and/or 1-decenol and oleic acid and/or oleoyl alcohol, namely octadec-9-enyl dec-9-enoate (JLE-28 1 ), dec-9-enyl oleate (JLE-28 2 ) and dec-9-enyl dec-9-enoate (JLE-20) [6]. 1-decenoic acid or 1-decenol is a fatty acid/fatty alcohol whose unique terminal double bond structure has not before been investigated in monoester formulations.…”

The Potential Anti-Psoriatic Effects of Jojoba Extract

“…Jojoba oil, a liquid unsaturated wax composed of esters of long carbon chain fatty acids (C20 to C22) and long carbon chains unsaturated alcohols (C20, C22 ) [9] . Jojoba oil is used in cosmetic, pharmaceutical, dietetic food, animal feeding, lubrication, polishing and bio-diesel fields [16] . Wax esters are neutral lipids which composed mainly of aliphatic alcohols and acids, with both moieties usually longchain (C (16) and C (18)) or very-long-chain (C (20) and longer) carbon structures [17] .…”