Abstract
The critical micelle concentration (cmc) and the concentration reducing 20 mN•m^(-1) of water surface tension (pC20) by the Gemini surfactant series (m-6-m) and the corresponding monomers (C(subscript m)TABr) were determined using surface tension measurements. Comparison between the active parameters indicates that the Gemini surfactants have a stronger micellization and adsorption ability than C(subscript m)TABr, which is attributed to the hydrophobic synergism between the alkyl tails of the Gemini surfactants. The effects of dissymmetry in the Gemini surfactants (12-6-m) on the micellization and adsorption were also discussed. The results showed that the Gemini surfactant with a symmetric structure is more effective in association and adsorption than that with a dissymmetric structure.
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