Investigation of water-containing inverted micelles by fluorescence polarization determination of size and internal fluidity

Journal Article · Sun Feb 01 04:00:00 EST 1981 · J. Colloid Interface Sci.; (United States)

DOI:https://doi.org/10.1016/0021-9797(81)90098-9· OSTI ID:6739910

Keh, E; Valeur, B

Water-containing inverted micelles of sodium di(2-ethylhexyl) sulfosuccinate (AOT) have been investigated by fluorescence polarization using fluorescent hydrophilic probes localized in the aqueous core of the micelles. Measurements of the stationary polarization in two apolar solvents of different viscosity but of the same chemical nature permit rapid determination of both micellar hydrodynamic volume and water pool fluidity as a function of water content up to (H/sub 2/O)/(AOT) = 11. The characteristics of AOT micelles appear to be unchanged in the n-alkane series from hexane to dodecane and slightly affected in various apolar solvents. Solvents of high polarizability such as benzene, toluene, and carbon tetrachloride penetrate into the amphiphile layer, presumably up to the water core boundary. No significant effect of sodium chloride was observed up to a concentration of 0.4 M. The inverse micelle size is independent of surfactant concentration below 0.3 M.

• OSTI ID: 6739910
• Journal Information: J. Colloid Interface Sci.; (United States), Journal Name: J. Colloid Interface Sci.; (United States) Vol. 79:2; ISSN JCISA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301* -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALKANES
CHLORIDES
CHLORINE COMPOUNDS
FLUID MECHANICS
HALIDES
HALOGEN COMPOUNDS
HYDROCARBONS
HYDRODYNAMICS
HYDROGEN COMPOUNDS
MECHANICS
MICELLAR SYSTEMS
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLARIZATION
QUANTITY RATIO
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLVENTS
SURFACTANTS
VISCOSITY
WATER