Results 71 to 80 of about 179 (133)

Synthesis of Estolide Ester and Amide from Acetylated Polyhydroxy Estolide for Lubricant Base Oil

European Journal of Lipid Science and Technology, 2020
AbstractPlant oil‐based lubricants are used as alternative for mainstream petroleum‐based lubricants mainly because they are known to be environmentally friendly. However, their market acceptance is limited by their high pour point and poor oxidation stability.
Seng Soi Hoong, Mohd Zan Arniza, Nek Mat Din Nik Siti Mariam, Abu Hassan Noor Armylisas, Siti Afida Ishak, Tuan Noor Maznee Tuan Ismail, Shoot Kian Yeong   +6 more
openaire   +1 more source

Enzymatic synthesis of estolides by a bioreactor

Journal of the American Oil Chemists' Society, 1997
AbstractAn attempt was made to synthesize ricinoleic acid estolides effectively with a bioreactor system containing immobilized lipase. The optimal water content for reaction changed during synthesis of estolide from ricinoleic acid. The water content needs to be controlled to optimize conditions for each reaction stage and to prepare estolide with a ...
Yasuko Yoshida, Mitsuo Kawase, Chozo Yamaguchi, Tsuneo Yamane   +3 more
openaire   +1 more source

Fatty Acid Estolides: A Review

Journal of the American Oil Chemists' Society, 2020
AbstractEstolides are bio‐based oils synthesized from fatty acids or from the reaction of fatty acids with vegetable oils. Estolides have many advantages as lubricant base oils, including excellent biodegradability and cold flow properties. Promising applications for estolides include bio‐lubricant base oils and in cosmetics.
Yunzhi Chen, Girma Biresaw, Steven C. Cermak, Terry A. Isbell, Helen L. Ngo, Li Chen, Amber L. Durham   +6 more
openaire   +1 more source

Selectivity of lipases for estolides synthesis

Pure and Applied Chemistry, 2014
Abstract Lipase-catalyzed synthesis of estolides starting from different saturated (C16 16OH, C18 12OH) and unsaturated (C18:1 9 cis 12-OH) hydroxy-fatty acids was investigated. For this reason, the catalytic efficiency of several native and immobilized lipases in different organic reaction media at temperatures up to 75 °C was studied ...
Todea, Anamaria, Frissen, A.E., Otten, Linda G., Arends, I., Peter, F., Boeriu, C.G.   +5 more
openaire   +2 more sources

Synthesis of estolide esters from cis‐9‐octadecenoic acid estolides

Journal of the American Oil Chemists' Society, 2001
AbstractOleic acid (cis‐9‐octadecenoic acid) was converted in excellent yield to the estolide, which was then esterified with 2,2‐dimethypropan‐1‐ol (neopentyl alcohol), cis‐9‐octadence‐1‐ol (oleyl alcohol), and 2‐propanol to generate the corresponding estolide esters.
Rogers E. Harry‐O kuru, Terry A. Isbell, David Weisleder   +2 more
openaire   +1 more source

Synthesis and Applications of Fatty Acid Estolides

2023
Fatty acid estolides are fatty acid oligomers, where the fatty acid chains are coupled to each other via secondary ester linkages. Fatty acid estolides can be produced by the acid-catalysed polymerization of unsaturated fatty acids or by the chemical or enzymatic condensation of hydroxy fatty acids.
Ewing, T.A., Blaauw, R., Li, Chao, Venkitasubramanian, Padmesh, Hagberg, Erik, van Haveren, J.   +5 more
openaire   +2 more sources

Structured Estolides: Control of Length and Sequence

Journal of the American Oil Chemists' Society, 2007
AbstractUsing ester‐forming reactions such as carbodiimide coupling and a modified Yamaguchi symmetrical anhydride method, a variety of estolides based on 17‐hydroxy oleic and 17‐hydroxy stearic acid have been prepared. These hydroxy fatty acids are produced in good yields from hydrolysis of sophorolipids, which are in turn derived from fermentation of
Jonathan A. Zerkowski, Alberto Nuñez, Daniel K. Y. Solaiman   +2 more
openaire   +1 more source

Physical properties of estolides and their ester derivatives

Industrial Crops and Products, 2001
Abstract Vegetable oil based lubricants have good lubricity and biodegradability but often fail to meet viscosity requirements at cold temperatures. These properties for a lubricant are often evaluated by pour point (PP), the minimum temperature at which a liquid will pour.
Terry A Isbell, Michelle R Edgcomb, Benjamin A Lowery   +2 more
openaire   +1 more source

Improved oxidative stability of estolide esters

Industrial Crops and Products, 2003
Abstract Some concerns have been raised regarding the oxidative stability of vegetable-based fluids. Thus, a wide range of commercial and vegetable-based materials were evaluated for their oxidative stability by the rotating bomb oxidative test (RBOT). RBOT values ranged from 13 to 552 min.
Steven C Cermak, Terry A Isbell
openaire   +1 more source

Estolides

2020
Jakob Bredsguard, Travis Thompson
openaire   +1 more source