Conductometric and spectroscopic studies of sodium dodecyl sulfate in aqueous media in the presence of organic chalcogen

S. K. Mehta, Savita Chaudhary, K. K. Bhasin, Rajeev Kumar, Makoto Aratono

Research output: Contribution to journalArticle

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Abstract

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.

Original languageEnglish
Pages (from-to)88-95
Number of pages8
JournalColloids and Surfaces A: Physicochemical and Engineering Aspects
Volume304
Issue number1-3
DOIs
Publication statusPublished - Sep 1 2007

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Chalcogens
Micellization
Sodium dodecyl sulfate
sodium sulfates
Sodium Dodecyl Sulfate
Critical micelle concentration
Surface-Active Agents
micelles
Surface active agents
Entropy
surfactants
entropy
conductivity
Radiation counters
Ultraviolet spectroscopy
Temperature
Free energy
Fourier transform infrared spectroscopy
Enthalpy
counters

All Science Journal Classification (ASJC) codes

  • Surfaces and Interfaces
  • Physical and Theoretical Chemistry
  • Colloid and Surface Chemistry

Cite this

Conductometric and spectroscopic studies of sodium dodecyl sulfate in aqueous media in the presence of organic chalcogen. / Mehta, S. K.; Chaudhary, Savita; Bhasin, K. K.; Kumar, Rajeev; Aratono, Makoto.

In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, Vol. 304, No. 1-3, 01.09.2007, p. 88-95.

Research output: Contribution to journalArticle

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