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- W2017248165 abstract "Quasielastic light scattering was used to investigate the size and shape of sodium dodecyl benzene sulfonate (SDBS) micelles in aqueous solutions. Measurements were made as a function of temperature and NaC1 and SDBS concentrations. Light scattering data indicate that the micelles are spherocylinders with a semiminor axis of 22 A. The length of the micelles increases strongly with salt concentration and decreases with temperature. The minimum micelle has an aggregation number of n o = 28 and a hydrodynamic radius of R = 22 A. Diffusion coeificient and intensity data were analyzed using a thermodynamic theory of micellar aggregation and a model based on DLVO theory of interactions. Due to their importance in tertiary oil recovery, surfactants of the alkylaryl sulfonate family have received considerable attention in recent years. In this paper we report the results of our quasi-elastic light-scattering measurements performed on dilute aqueous solutions of sodium dodecyl benzene sulfonate (SDBS). Many investigators have performed static (1-2) and dynamic (3-7) light-scattering experiments on aqueous solutions of ionic micelles. These results indicate that large, polydisperse micellar aggregates are present, and that the size of the aggregates depends on temperature, ionic strength, and in some cases the counterion. Despite extensive experimental and theoretical work, our understanding of micellar solutions is not complete. This is due to the fact that the size and shape of the micelles may be changed by changing either the amphiphile or the electrolyte concentration or the temperature of the solution. Thus one has to rely on theoretical models and several different experi~Author to whom correspondence should be addressed. mental techniques to separate the effects of intermicellar interactions on the equilibrium and transport properties from those due to a change in micelle size and shape. We present extensive data on the size and shape of SDBS miceUes and analyze our results in terms of two different models." @default.
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- W2017248165 date "1982-12-01" @default.
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- W2017248165 title "Micellization and intermicellar interactions in aqueous sodium dodecyl benzene sulfonate solutions" @default.
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- W2017248165 doi "https://doi.org/10.1016/0021-9797(82)90308-3" @default.
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