Journal
JOURNAL OF SURFACTANTS AND DETERGENTS
Volume 18, Issue 2, Pages 297-302Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11743-014-1655-5
Keywords
Gemini surfactant; Synergism; Surface tension; Micelle; Mixture
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Surface tension, fluorescence, and dynamic light scattering were used to investigate the properties of a binary surfactant system comprising an anionic gemini surfactant (DLMC) and cationic gemini surfactant (II-12-EO2). Surface tension measurements afforded the critical micelle concentration (cmc) of the mixture and the values are all lower than those of pure constituent surfactants. For the mixtures of II-12-EO2/DLMC, the micelle aggregation number decreases with the increase of II-12-EO2, and the micropolarity of the micelle is lowest when the molar fraction of II-12-EO2 is 0.5; the hydrodynamic radius (R (h)) of the mixed micelle first increases and then decreases with the addition of II-12-EO2, and larger micelles are obtained when the molar fraction of II-12-EO2 is 0.5 or 0.7.
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