Abstract
On the basis of measurements of conductivity and surface activity, adsorption and micellization parameters such as critical micellization concentration (CMC), adsorption efficiency, effectiveness of surface tension reduction, and a degree of counterion dissociation (α) for four new ammonium surfactants, octyl-N-(2-hydroxyethyl)-N-(2-hydroxypropyl) ammonium chloride, nonyl-N-(2-hydroxyethyl)-N-(2-hydroxypropyl) ammonium chloride, dodecyl-N-(2-hydroxyethyl)-N-(2-hydroxypropyl) ammonium chloride, and hexadecyl-N-(2-hydroxyethyl)-N-(2-hydroxypropyl) ammonium chloride in aqueous solutions have been determined. The values of CMC determined by two different methods are compared, and they show reasonable agreement. Using the results of electroconductometric and tensiometric measurements, enthalpy (ΔH), the Gibbs free energy (ΔG), and entropy (ΔS) for processes of adsorption and micellization have been computed. The influence of the length of the alkyl chain in the synthesized salts on surface activity and thermod...
Published Version
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