NDLI: Micellar behavior of short chains phospholipids binary mixture in an aqueous medium: interfacial and fluorescence study

Content Provider	Springer Nature Link
Author	Sehgal, P. Doe, H. Sharma, M.
Copyright Year	2003
Abstract	The mixed micellar behavior of short chain zwitterionic phospholipids 1,2-dioctanoyl-sn-glycero-3-phosphocholine (DOPC) and 1,2-diheptanoyl-sn-glycero- 3-phosphocholine (DHPC) have been studied at the air-water interface and in the aqueous bulk phase via interfacial tension and pyrene fluorescence (I 1/I 3) intensity measurements, respectively. The critical micellar concentration (cmc) and the thermodynamic parameters such as the free energy of micellization have been evaluated. The interfacial study reveals that a mixed monolayer is formed at the air-water interface by the adsorption of both of the phospholipids. This has been confirmed by evaluating interfacial parameters; the maximum surface excess (Γmax) or the minimum area per molecule (A min) of those monomers. Their mixing behaviors have also been expressed in terms of the regular solution interaction parameter, β, in the mixed micelle. The β parameters are not significantly different from each other, and very close to zero; in other words they are consistent with ideal behavior. The equilibrium distribution of components between the micelle and the aqueous bulk was evaluated by Motomura's formulation. The micellar mole fraction evaluated from regular solution theory and Motomura's formulation also lies close to that corresponding to ideal behavior.
Starting Page	188
Ending Page	192
Page Count	5
File Format	PDF
ISSN	0303402X
Journal	Colloid and Polymer Science
Volume Number	282
Issue Number	2
e-ISSN	14351536
Language	English
Publisher	Springer-Verlag
Publisher Date	2003-09-13
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	DOPC DHPC Mixed micelles Interfacial Fluorescence behaviors
Content Type	Text
Resource Type	Article
Subject	Colloid and Surface Chemistry Materials Chemistry Physical and Theoretical Chemistry Polymers and Plastics

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