Mixed surfactant systems exhibit better solution properties as compared to a single surfactant system. Conductivity measurements were used to examine the interactions between gemini's and their conventional monomeric surfactant CTAB in aqueous solutions. Using regular solution theory, deviations from ideal behavior were observed. Experiments indicated that the interaction parameter (β) is close to the ideal behavior. Actually, the β values for all the observed systems are found to be positive or close to zero, and the mixed CMC values are lower than the ideal CMC's obtained from equation.
Aggregation numbers were determined by using steady-state fluorescence quenching method, varying the nature of spacer. Nagg values were lower for all dimeric surfactants than for conventional surfactant CTAB, which may be due to the presence of hydrophilic spacer. Nagg values increased with the increase in mole fraction of conventional surfactant. At higher mole fractions of CTAB (α1 ≥ 0.6), NCTAB values are higher than Ngem values.
Mixed surfactant systems exhibit better solution properties as compared to a single surfactant system. Conductivity measurements were used to examine the interactions between gemini's and their conventional monomeric surfactant CTAB in aqueous solutions. Using regular solution theory, deviations from ideal behavior were observed. Experiments indicated that the interaction parameter (β) is close to the ideal behavior. Actually, the β values for all the observed systems are found to be positive or close to zero, and the mixed CMC values are lower than the ideal CMC's obtained from equation.Aggregation numbers were determined by using steady-state fluorescence quenching method, varying the nature of spacer. Nagg values were lower for all dimeric surfactants than for conventional surfactant CTAB, which may be due to the presence of hydrophilic spacer. Nagg values increased with the increase in mole fraction of conventional surfactant. At higher mole fractions of CTAB (α1 ≥ 0.6), NCTAB values are higher than Ngem values.
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