Shapes and Sizes of Sulfosuccinate-type Fluorocarbon Surfactant Vesicles in Aqueous Solutions

概要

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The properties of vesicles with a double-chained fluorocarbon surfactant, sodium bis [2- (perfluorooctyl) ethyl] 2- sulfosuccinate (SFS), have been investigated with the dynamic light-scattering method, the static light-scattering method, and the fluorescence probe method. Vesicles having the entrapped efficiency of 2% were formed after ultrasonication for 15 min. The hydrodynamic radius (RH) of SFS vesicles decreased with an increase in ultrasonication time, and then reached a constant value at 90 min ultrasonication. SFS vesicles formed were very stable and no change in the RH value was observed for at least 10 days. The molecular weight of aggregates, aggregation number, and gyration radius (R<SUB>G</SUB>) of SFS vesicles increased with increasing RH, while the dielectric constant of the vesicular hydrophilic region was independent of R<SUB>H</SUB>. Moreover, geometry of SFS vesicles in aqueous solutions was found to be cylindrical having a constant cross sectional area.
Japan Society of Colour Materialの論文