Abstract
Self-assembled structures and phase behavior in water and water-oil systems containing mixed surfactants have been studied to understand complex effects of several factors such as surfactant and solvent molecular architecture, temperature, compositions, additive effects. This review contains three topics from those studies. First topic is about the effect of water-soluble alcohols on the nonionic micelle formation, in which the glycerol induces a micellar growth while the propyleneglycol brakes micelles down into monomers. The second topic is about a method to evaluate the amount of oil solubilized in the surfactant palisade layer by a small angle X-ray data and a structural model. The last topic is describing that the difference of surfactant molecular weight between two surfactants in a mixed surfactant system leads to coexisting lamellar phases or micelles having different compositions.
