Title of article
Conductometric Study of the Thermodynamics of Micellization of Sodium dodecylsulfate (SDS) in the Presence of Some Aromatic Ammonium Salts
Author/Authors
owoyomi, o Chemistry Department - Obafemi Awolowo University - Ile Ife , Nigeria , funso olorunyomi, j Chemistry Department - Obafemi Awolowo University - Ile Ife , Nigeria , emmanuel olaoye, o Chemistry Department - Obafemi Awolowo University - Ile Ife , Nigeria
Pages
10
From page
531
To page
540
Abstract
The effect of three organic aromatic salts - Phenyltrimethylammonium (PhTMAB), benzyltrimethylammonium (BzTMAB) and benzyltrimethylammonium (BzTEAB) bromides - on the micellization of sodium dodecylsulfate has been investigated by conductometric method. The critical micelle concentration (CMC) values were found to decrease with increase in the concentration of the aromatic ammonium salts. Thermodynamic parameters of micellization were obtained from CMC measurement in the presence of 0.001 M of the three quaternary aromatic ammonium salts in the temperature range 293-313 K at 5 K intervals. The Gibbs free energy values were generally negative in the presence of the aromatic salts and slightly varied with temperature. The micellization process was both enthalpy and entropy driven. Enthalpy-entropy compensation was observed for all the system with a constant compensation temperature values around 302 K and negative intrinsic enthalpy of compensation.
Keywords
Micellization , Aromatic ammonium salts , thermodynamic parameters , Enthalpy-entropy compensation
Journal title
Physical Chemistry Research
Serial Year
2017
Record number
2511679
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