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Thermodynamic Properties of Binary and Ternary Aqueous Surfactant Systems

  • Jarl B. Rosenholm
  • Reid B. Grigg
  • Loren G. Hepler

Abstract

We have made measurements by flow calorimetry and flow densimetry that have led to apparent and partial molar heat capacities and also apparent and partial molar volumes of aqueous solutions of surfactants (cationic, anionic, and non-ionic) at concentrations both smaller and larger than the critical micelle concentrations. Results of these measurements lead to independent determinations of the critical micelle concentrations and also permit evaluations of ΔCp and ΔV values for micelle formation. All such ΔV values are positive, while all ΔCp values are negative. We have also made similar measurements of heat capacities and densities on solutions of p-xylene, octane, and decanol in surfactant solutions in an effort to gather information that will ultimately improve our understanding of solubilization. Some exploratory measurements of enthalpies of solution have also been made on these same three component systems.

Keywords

Heat Capacity Critical Micelle Concentration Colloid Interface Surfactant Solution Partial Molar Volume 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1982

Authors and Affiliations

  • Jarl B. Rosenholm
    • 1
  • Reid B. Grigg
    • 1
  • Loren G. Hepler
    • 1
  1. 1.Department of Chemistry and Oil Sands Research LaboratoryUniversity of LethbridgeLethbridgeCanada

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