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Some dielectric properties of reversed micellar systems with different alkali carboxylates and n-alcohols

Some dielectric properties of reversed micellar systems with different alkali carboxylates and n-alcohols. Sjoeblom, Johan; Joensson, Bengt; Nylander, Claes; Lundstroem, Ingemar (Inst. Surf. Chem., Stockholm S-114 86, Swed.). J. Colloid Interface Sci., 96(2), 504-16 (English) 1983. CODEN: JCISA5. ISSN: 0021-9797. DOCUMENT TYPE: Journal CA Section: 66 (Surface Chemistry and Colloids) Section cross-reference(s): 76 The dielec. consts.There are some reagents with their cas registry numbers 112-30-1 and 16577-52-9 are used in this study. e of different reversed micellar systems are presented. From the behavior of e, it is possible to distinguish between 3 different levels of micellization in a long-chain alc. as the content of the alc. decreases. The premicellar soln. is characterized by a decreasing e due to the predominating interaction between the alc. and water at the highest alc. contents. The formation of reversed micelles is accompanied by a pronounced increase in e, which grows almost linearly as long as the aggregates are mainly spherical in shape. At the lowest contents of the alc., e increases rapidly which reflects changes in micellar shape and packing conditions. When a cell model is applied to the 1st micellar region with spherical aggregates, the exptl. and theor. results agree. The model makes it possible to predict the rigidity of the palisade layer surrounding the aq. core. This layer is quite rigid for long-chain alc. systems, but when the polarity of the alc. increases it is no longer possible to distinguish a well-defined palisade layer. .