Properties of a Binary System Containing Anionic and Cationic Gemini Surfactants |
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| Authors: | Hujun Xu Benna Liu Peng Kang Xinyan Bao |
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| Affiliation: | 1. , School of Chemical and Material Engineering, Jiangnan University, Wuxi, People's Republic of China;2. , The Key Laboratory of Food Colloids and Biotechnology, Ministry of Education, School of Chemical and Material Engineering, Jiangnan University, Wuxi, People's Republic of China |
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| Abstract: | 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 (Rh) 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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| Keywords: | Gemini surfactant Synergism Surface tension Micelle Mixture |
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