Association of ionic surfactant in binary water—ethanol media as indicator of changes in structure and properties of solvent.

Association of sodium dodecyl sulfate (SDS) ionic surfactant in concentration range of 1–100 mmol L−1 in binary water—ethanol media with alcohol volume concentrations of 0–92.3 vol.% was studied by conductometry and nuclear magnetic resonance spectrometry. The dynamic properties of surfactant solutions including self-diffusion processes and diffusive transfer of charges in SDS solutions under alteration of solvent micro-heterogeneous structure were studied. The transformation of structure and size of SDS associates upon change of ethanol content in the solution was discussed. The correlation between SDS association processes and changes in micro-heterogeneous structure of binary solvent was analyzed. [ABSTRACT FROM AUTHOR]