Influence of methanol and dimethyl sulfoxide and temperature on the micellization of cetylpyridinium chloride

Thermodynamic properties such as the standard free energy of micellization (∆ Gmo), the standard enthalpy of micellization (∆ Hmo), the standard entropy of micellization (∆ Smo), the standard free energy of transfer (∆ Gtranso) and the heat capacity of micellization (∆mCp°) of CPC are significantly affected by the addition of methanol and dimethyl sulfoxide (DMSO). The solvophobic parameter characterized by the Gibbs energy of transfer of hydrocarbons from gas into a given solvent can be used to account for the effect of methanol and DMSO on the formation and growth of the CPC aggregate in water.