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Conductance and surface tension of ionic surfactants in molten acetamide

Authors
Journal
Colloids and Surfaces A Physicochemical and Engineering Aspects
0927-7757
Publisher
Elsevier
Publication Date
Volume
125
Identifiers
DOI: 10.1016/s0927-7757(96)03897-6
Keywords
  • Acetamide
  • Conductivity
  • Critical Micelle Concentration
  • Micelles
  • Surface Tension

Abstract

Abstract Electrical conductivity and surface tension measurements on various surfactants, such as sodium caprylate, sodium laurate, sodium palmitate, sodium stearate, sodium oleate, sodium dodecyl sulfate and lithium dodecyl sulfate, in molten acetamide were carried out at 90 °C. Both methods show that micelles are formed in acetamide solution. The critical micelle concentration was determined for each of the surfactants. It is suggested that the simplest formula of the ionic micelle is (S −) n (CH 3CONH 2) x , and at higher concentration the micelle may be of the form (NaS) m (S −) n (CH 3CONH 2) x , where NaS = sodium stearate.

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