Abstract
Understanding the influence of various additives on the properties of aqueous surfactant solutions is profoundly significant because of numerous applications of surfactant-based frameworks. Thus, the aggregation behavior of conventional cationic surfactants dodecyl trimethylammonium bromide (DTAB) and dodecyl trimethylammonium chloride (DTAC) has been investigated in the absence and presence of (0.05, 0.10, and 0.15) wt.% ionic liquids (ILs) 1-propyl-3-methylimidazolium bromide [C3mim][Br] and 1-butyl-3-methylimidazolium bromide [C4mim][Br] in aqueous medium at different temperatures (298.15, 303.15, and 308.15) K. The values of critical micelle concentration (CMC) have been evaluated for various IL/surfactant systems by employing three different techniques such as conductivity, fluorescence, and UV–VIS spectroscopy. The thermodynamic parameters of micellization have been ascertained utilizing these CMC values, determined by various techniques. Thermodynamic parameters like standard free energy, standard enthalpy, and standard entropy of micellization were examined in terms of driving force behind the process of micellization. These parameters revealed that the addition of ILs modifies the aggregation properties of DTAB and DTAC.
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