Effect of Dextrose and Temperature on the Micellization of Cationic Gemini Surfactant (16-6-16)

In the present study, we report the micellization behavior of a cationic gemini surfactant, hexanediyl-1,6-bis(dimethylcetylammonium bromide) (16-6-16) at different fixed temperatures and fixed concentration of dextrose in aqueous solutions. The critical micelle concentration (cmc) of 16-6-16, measured by the conductivity and dye solubilization methods. An increasing trend of the cmc values were found with additive (dextrose) concentrations. A similar cmc values increasing trend were found with the temperatures (i.e., increases with increasing temperature). The thermodynamic parameters, viz., standard Gibbs energy (Delta G(m)(0)), standard enthalpy (Delta H-m(0)), and standard entropy (Delta S-m(0)) of micellization of 16-6-16, are evaluated. The values indicate less stability of the 16-6-16 solution in the presence of dextrose.