Abstract
The aqueous solution properties of a nonionic silicone surfactant of dimethylpolysiloxane and its mixed surfactant systems were studied. It was found that the silicone surfactant has a high surface activity and forms micelles in two steps: premicelles in dilute concentrations and polymolecular micelles above 3.7 × 10−7 mol dm−3.
In mixed systems of the silicone surfactant with anionic hydrocarbon or fluorocarbon surfactant, weak intermicellar interactions were found. They are due to electrostatic interaction between hydrophilic groups of the respective micelles. Dye solubilization measurements showed that the solubilized amount of Yellow-OB is greater than predicted by ideal systems. Hydrazo-azo tautomerism is observed in fluorocarbon-silicone surfactant systems, while Yellow-OB is solubilized only in the azo-form in the hydrocarbon-silicone surfactant system.
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Ohno, M., Esumi, K. & Meguro, K. Aqueous solution properties of a silicone surfactant and its mixed surfactant systems. J Am Oil Chem Soc 69, 80–84 (1992). https://doi.org/10.1007/BF02635881
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DOI: https://doi.org/10.1007/BF02635881