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Preparation of dibasic acid‐containing soy phospholipids by chemical and enzyme‐catalyzed transesterification and evaluation of their surface‐active properties
Author(s) -
Das Soma,
Das Kali Pada,
Bhattacharyya D. K.
Publication year - 2006
Publication title -
journal of surfactants and detergents
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.349
H-Index - 48
eISSN - 1558-9293
pISSN - 1097-3958
DOI - 10.1007/s11743-006-5014-z
Subject(s) - dibasic acid , chemistry , transesterification , organic chemistry , lipase , critical micelle concentration , phospholipid , catalysis , adipic acid , alkyl , aminolysis , micelle , enzyme , biochemistry , membrane , aqueous solution
The preparation of dibasic acid‐containing soy phospholipid was made by transesterification reaction with alkyl ester of diabasic acid with both lipase and alkoxide as a catalyst. The extent of incorporation of a dibasic acid varied with the molecular size of the dibasic acid. The extent of incorporation in soy phospholipids was 4–13% in the case of adipic acid and 9–20% in the case of sebacic acid. The surface‐active properties of these modified soy phospholipids were examined and were found to be different from those of the original (unmodified) soy phospholipid. The interfacial properties such as critical micelle concentration (CMC), γ CMC , surface excess concentration Γ max , and minimum area per molecule (Å), and thermodynamic parameters such as standard free energy of micellization, were found to depend on the hydrophobic part of the dibasic acids.