FT-IR spectroscopic and micellization studies of cetyltrimethylammonium bromide in aqueous and aqueous solution of ionic liquid (1-butyl-3-methylimidazolium bromide) at different temperatures

The electrical conductivity and infrared spectroscopic measurement of aqueous solutions of cetyltrimethylammonium bromide (CTAB), cationic surfactant, with imidazolium based ionic liquid 1-butyl-3 methyl imidazolium bromide [C(4)mim] [Br] were determined at different weight percentages and temperatures. The temperature dependence of critical micelle concentration (cmc) obtained from conductivity measurements at different temperatures (298.15, 303.15, and 308.15) I< has been used to calculate various thermodynamic parameters of micellization like standard enthalpy of micellization (Delta S-m(o)), standard free energy of micellization (Delta G(m)(o)), and standard entropy of micellization (Delta H-m(o)), and the obtained parameters are further used to understand the effect of ionic liquid on surfactant. The influence of ionic liquid 1-butyl-3-methylimidazolium Bromide [C(4)mim][Br] on the micellization process of the cetyltrimethylammonium bromide (CTAB) is discussed. (C) 2017 Elsevier B.V. All rights reserved.