Application of Conductance Study to Analyze Micellization Behavior of Cationic Gemini Surfactants in Water and Water Ethanol Solvent Mixed Media
The paper presents the analysis of micellization behavior of cationic gemini surfactants with similar structures with varying atom number in spacer: heptylene 1,7 bis(dimethyloctylammonium) bromide (8 7 8) and octylene 1,8 bis(dimethyloctylammonium) bromide (8 8 8) in water and water ethanol solvent mixed media. Experiments were carried out by using conductometric method within the temperature range of 288.15 323.15 K. The values of micellization parameters and thermodynamic functions of aggregation [critical micelle concentration (cmc) the degree of dissociation of micelles (a) enthalpy of micellization (DHmo) entropy of micellization (DSmo) Gibbs free energy of micellization (DGmo] within the temperature range investigated were determined. Based on the investigations performed it has been shown that the systems containing the additives ethanol have a positive value DGtranso, a more positive value DGmo, and a higher value of a and cmc as compared to pure water what confirms that the micellization pro.