CONDUCTOMETRIC STUDIES ON THE EFFECT OF TEMPERATURE AND TETRAMETHYLAMMONIUM BROMIDE SALT ON THE MICELLIZATION OF CETYLTRIMETHYLAMMONIUM BROMIDE IN AQUEOUS MEDIUM

Authors : Olaseni Esan

Pages : 246-252

Doi:10.5541/ijot.5000130524

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Publication Date : 2015-01-18

Article Type : Other

Abstract :The subject of this study concerns the effect of temperature and Cetyltrimethyl ammonium bromide (CTABr) in the presence of tetramethylammonium bromide [(Me)4N+Br-] at different temperature using conductometric method. CTABr showed a remarkable decrease in critical micelle concentration (CMC) in the presence of [(Me)4N+Br-]. The CMC values reduced to a certain minimum in all cases, with increase in the system temperature at different concentration of [(Me)4N+Br-]. The thermodynamic parameters ( , and ) for the micelle system were estimated by applying the phase separation model while the data obtained allowed access to their usability on the micellization process. Enthalpy – entropy compensation was observed, with a constant compensation temperature of 296K.
Keywords : thermodynamic parameter, micellization, enthalpy-entropy compensation, tetramethylammonium bromide, hydrophobic