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Microemulsions Formed by a Catanionic Surfactant or by an Ionic Surfactant with an Organic Counterion

  • R. Friman , S. Backlund , E. Høgnesen and T. Austad
Published/Copyright: May 5, 2013
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Tenside Surfactants Detergents
From the journal Tenside Surfactants Detergents Volume 41 Issue 4

Abstract

The phase diagrams at 298.2 K for the systems heptylammonium heptanoate-heptane-water, butylammonium decanoate-butanol-decane-water and butylammonium decanoate-butanol-decane-sodium chloride (aq) have been determined. A large three-phase region and an extensive microemulsion phase were obtained for the heptylammonium heptanoate system. Addition of both cosurfactant and electrolyte brings about a separation into three phases in the butylammonium decanoate-water system. All three-phase systems were characterized by low inter-facial tensions. Sound velocity, conductivity, and viscosity measurements were used successfully for qualitative studies of microstructural transitions in the isotropic microemulsion phase.

Kurzfassung

Die Phasendiagramme für die Systeme Heptylammoniumheptanoat in einem Heptan-Wassergemisch, Butylammoniumdekanoat in einem Butanol-Dekan-Wasergemisch und Butylammoniumdekanoat in einem Gemisch aus Butanol, Dekan und Natriumchlorid (aq) wurden bei 298.2 Kbestimmt. Eine großes Dreiphasengebiet und eine ausgedehnte Mikroemulsionsphase wurde für das Heptylammoniumheptanoat-System erhalten. Der Zusatz von Co-Tensid und Elektrolyt im Butylammoniumdekanoat-Wasser-System führt zu einer Trennung in drei Phasen. Alle Dreiphasen-Systeme sind mit niedriger Grenzflächenspannung gekennzeichnet. Für qualitative Studien der mikrostrukturierten Übergänge in der isotropen Mikroemulsionsphase wurden Messungen der Schallgeschwindigkeit, Leitfähigkeit und Viskosität erfolgreich durchgeführt.

∗ Correspondence to Dr. Rauno Friman, ÅboAkademi University Department of Physical Chemistry Porthaninkatu 3–5 FI-20500 Turku Finnland E-mail:

Rauno Friman studied chemistry at ÅboAkademi University and obtained his PhD in 1983. He presently works as a lecturer at Åbo Akademi University, Finland. His research interests include aggregation and phase structures in surfactant systems.

Sune Backlund studied chemistry at ÅboAkademi University and obtained his PhD in 1979. 2003 he has retired from the lectureship at Åbo Akademi University. His research interests include phase studies, microemulsions and stereoselective enzymatic synthesis.

Eli Høgnesen studied at Stavanger University College and obtained his master degree in petroleum technology in 2001. He presently works as a PhD student at Stavanger University College, Norway. His present research interest is improved oil recovery from oil wetted carbonates.

Tor Austad studied chemistry at the University of Bergen and obtained his dr. philos. degree in 1975. He presently works as professor in reservoir chemistry at Stavanger University College, Norway. His present research interests are petroleum related research concerning chemical and physical fluid properties, chemical flooding, wettability studies of carbonates, improved oil recovery from fractured carbonates by water flooding.

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Received: 2004-6-30
Published Online: 2013-05-05
Published in Print: 2004-09-01

© 2004, Carl Hanser Publisher, Munich

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https://doi.org/10.3139/113.100224

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
  6. A Protocol to Examine the Colour Damage Profile of Bleach Containing Detergents
  7. Testing of the Fabric Damage Properties of Bleach Containing Detergents
  8. Process Management Based on Analysis of Surfactant Properties
  9. GDCH Special Group Meeting
  10. Comparison between Interaction Forces at Air/Liquid and Solid/Liquid Interfaces in the Presence of Non-Ionic Surfactants
  11. Self-Organized Nano-Particles for Enhanced Wetting of Hard Surfaces∗∗
  12. Environmental Care and Consumer Protection – Example for the Official Survey of Laundry Detergents and Cleansing Agents
  13. Physical Chemistry
  14. Microemulsions Formed by a Catanionic Surfactant or by an Ionic Surfactant with an Organic Counterion
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