TY - JOUR
T1 - Conductometric and spectroscopic studies of sodium dodecyl sulfate in aqueous media in the presence of organic chalcogen
AU - Mehta, S. K.
AU - Chaudhary, Savita
AU - Bhasin, K. K.
AU - Kumar, Rajeev
AU - Aratono, Makoto
N1 - Funding Information:
This work was supported by the financial assistance from Council of Scientific and Industrial Research (CSIR) New Delhi.
PY - 2007/9/1
Y1 - 2007/9/1
N2 - The effect of the addition of the organic chalcogen (Py2Se2) on the micellization of Sodium dodecyl sulfate (SDS) in aqueous solution was studied using spectroscopic and electrical conductivity techniques. UV-vis spectroscopy, nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR) were employed to get information regarding the interaction between the surfactant and additive aggregates and the mechanism of docking of the surfactant and the additive molecules in the system. The system has been investigated in terms of concentration and temperature variation for conductometric studies. The conductivity data were used to determine the critical micelle concentration (cmc) and degree of counter ion binding (β) in the temperature range 288.15-323.15 K. The free energy (ΔGm°), enthalpy (ΔHm°) and entropy (ΔSm°) of micellization were determined using the temperature dependence of cmc. The calculated thermodynamic parameter |TΔSm| is larger than |ΔHm|, which indicates that the micellization is entropy driven.
AB - The effect of the addition of the organic chalcogen (Py2Se2) on the micellization of Sodium dodecyl sulfate (SDS) in aqueous solution was studied using spectroscopic and electrical conductivity techniques. UV-vis spectroscopy, nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FTIR) were employed to get information regarding the interaction between the surfactant and additive aggregates and the mechanism of docking of the surfactant and the additive molecules in the system. The system has been investigated in terms of concentration and temperature variation for conductometric studies. The conductivity data were used to determine the critical micelle concentration (cmc) and degree of counter ion binding (β) in the temperature range 288.15-323.15 K. The free energy (ΔGm°), enthalpy (ΔHm°) and entropy (ΔSm°) of micellization were determined using the temperature dependence of cmc. The calculated thermodynamic parameter |TΔSm| is larger than |ΔHm|, which indicates that the micellization is entropy driven.
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U2 - 10.1016/j.colsurfa.2007.04.031
DO - 10.1016/j.colsurfa.2007.04.031
M3 - Article
AN - SCOPUS:34347335467
SN - 0927-7757
VL - 304
SP - 88
EP - 95
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -