Interaction of Cetyltrimethylammonium Bromide with Sodium Dodecyl-Sulfate in Electrolyte and Nonelectrolyte Environments

  • A. B. Mandal
  • S. P. Moulik

Abstract

Results of interaction between cetyltrimethylammonium bromide(CTAB) and sodium dodecylsulfate(SDS) at levels below and above their critical micelle concentrations (CMCs) in aqueous medium and in the presence of additives like NaCl, glucose, urea, p-tert-alkyl-phenoxypolyoxyethyleneether(Triton X 100), polyoxyethylenesorbitanmonolaurate(Tween 20), polyoxyethylenesorbitanmonooleate(Tween 80) and polyethyleneglycol (M.W. 600, PEG 600) are presented. Above certain concentrations, the product of formation (the complex, CTA+…DS) became insoluble. The formation of the precipitate could be greatly influenced by the additives. Both NaCl and urea decreased the solubility, whereas glucose increased it. The effects of the nonionic surfactants TX 100, Tween 20 and Tween 80 showed some peculiarities when SDS was taken below and above its CMC in solutions containing both CTAB and nonionics above their CMCs. Below the CMC of SDS, TX 100 decreased the solubility while Tweens and PEG increased it.

Keywords

Entropy Surfactant Urea Enthalpy Bromide 

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • A. B. Mandal
    • 1
  • S. P. Moulik
    • 1
  1. 1.Department of ChemistryJadavpur UniversityCalcuttaIndia

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