Results 111 to 120 of about 509 (160)

Film-Forming Properties of Estolides

World Tribology Congress III, Volume 1, 2005
Estolides are biobased materials obtained from synthesis of ingredients derived from agricultural products. They are oligoesters obtained by the reaction of fatty acids and/or methyl esters with a double bond. By varying the chemistries of the starting materials and the reaction conditions, estolides of varying chemical structures, and physical ...
G. Biresaw, S. C. Cermak, T. A. Isbell
openaire   +1 more source

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

Studies in estolides. I. Kinetics of estolide formation and decomposition

Journal of the American Oil Chemists' Society, 1965
AbstractA study has been made of the rate of formation of estolides from castor oil fatty acids and of their decomposition at different temps. Estolide formation appears to be optimum at the end of 5 hr at about 220C, beyond which estolides start decomposing, giving rise to DCO fatty acids.
S. N. Modak, J. G. Kane
openaire   +1 more source

Biodegradation of estolides from monounsaturated fatty acids

Journal of the American Oil Chemists' Society, 1997
AbstractMono‐ and polyestolides, made from oleic acid, meadowfoam oil fatty acids and erucic acid, were subjected to biodegradation with mixed cultures of Penicillium verucosum, Mucor racemosus, and Enterobacter aerogenes. Fermentations were continued for 3, 5, 10, 15, 20, or 30 d.
Selim M. Erhan, Robert Kleiman
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
exaly   +2 more sources

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

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

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

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

Physical properties of saturated estolides and their 2-ethylhexyl esters

Industrial Crops and Products, 2002
Abstract Biodegradable, vegetable oil-based lubricants must have better low temperature properties before they can become widely acceptable in the marketplace. These low temperature properties are usually measured as the material's pour point, the minimum temperature at which a material will still pour.
Steven C Cermak
exaly   +2 more sources