Changes in Octaethyleneglycol Mono N-Dodecyl Ether Micelles in Aqueous 1,4-Dioxane Solutions

ABSTRACT

The structures of micelles of the surfactant Octaethyleneglycol mono n-dodecyl ether (C₁₂E₈, BL-8SY) in 0–80% aqueous 1,4-dioxane solutions (pH 7.2, ionic strength 2.44 mM) were investigated by small-angle X-ray scattering. C₁₂E₈ forms the core–shell discus micelle in 0–80% aqueous 1,4-dioxane solutions. Changing properties of aqueous 1,4-dioxane solution did not affect the outside-shapes of C₁₂E₈ micelles; however, it might be resulted in changing the structures of C₁₂E₈ micelles from normal core–shell discus micelles to reverse core–shell discus micelles in 1,4-dioxane concentrations between 40 and 60%.

Keywords:

Micelle, Small-angle X-ray scattering, Micellar structure investigations, Least-squares fit calculatio, Ternary system, core–shell discus micelle.