Abstract
The aqueous mixtures of sodium dodecylsulfate (SDS) and diethylsulfoxide (DESO) have been studied using conductivity, viscosity and surface tension techniques. The critical micellar concentration (cmc) was determined in the presence of DESO at 30, 40, and 50 ∘C from conductance and surface tension measurements. The enthalpy (Δ Gm∘), entropy (Δ Sm∘) and Gibbs energy (Δ Gm∘) of micellization were determined from the temperature dependence of the cmc. The results obtained were compared with published results for aqueous solutions of SDS and dimethylsulfoxide (DMSO). The data demonstrate a more pronounced inhibitory effect of DESO on the micellization of SDS, in comparison with the effect of DMSO. On the basis of the dependences of the relative viscosities on concentration, as given by the Jones–Dole semi-empirical equation, the B-coefficients have been calculated for the post-micelle composition region.
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Markarian, S.A., Harutyunyan, L.R. & Harutyunyan, R.S. The Properties of Mixtures of Sodium Dodecylsulfate and Diethylsulfoxide in Water. J Solution Chem 34, 361–368 (2005). https://doi.org/10.1007/s10953-005-3056-x
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DOI: https://doi.org/10.1007/s10953-005-3056-x