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Foam Film Characterization of Commercial Surfactants and their Mixtures

  • E. Hristova , Khr. Khristov and D. Exerowa
Published/Copyright: May 8, 2013
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Tenside Surfactants Detergents
From the journal Tenside Surfactants Detergents Volume 42 Issue 4

Abstract

The properties of microscopic foam films formed by two commercial surfactants, sodium alkylethoxy sulfate and linear alkylbenzene sulfonic acid as well as by their mixtures are studied. The results obtained refer to the following dependences: surface tension on surfactant concentration at three different electrolyte concentrations; film thickness on electrolyte concentration at constant surfactant concentration; film thickness on surfactant concentration at constant electrolyte concentration; disjoining pressure on film thickness (disjoining pressure isotherms). Calculated are the following physicochemical parameters: the diffuse electric layer potential, surface charge, molecule area for the respective surfactant and close packing surface concentration of the adsorption layer. The data obtained provide an option to link the model foam film experiments with the real processes and systems.

Kurzfassung

Die Eigenschaften von mikroskopischen Schaumfilmen, gebildet von zwei handelsüblichen oberflächenaktiven Stoffen – Natriumalkylethoxysulfat und lineare Alkylbenzensulfonsäure, als auch von ihren Mischungen, wurden untersucht. Es wurden Ergebnisse über die Abhängigkeiten der Oberflächenspannung von der Konzentration des oberflächenaktiven Stoffes bei drei verschiedenen Konzentrationen des Elektrolyten, der Filmdicke von der Konzentration des Elektrolyten bei konstanter Konzentration des oberflächenaktiven Stoffes, der Filmdicke von der Konzentration des oberflächenaktiven Stoffes bei konstanter Elektrolytkonzentration, und des Trenndruckes von der Filmdicke (Trenndruckisotherme) erhalten. Die physikalisch-chemische Parameter: Potential der diffusen elektrischen Doppelschicht, Oberflächenladung, Molekülflächen des betreffenden Tensids und die Oberflächenbedeckungskonzentration der Adsorptionsschicht wurden berechnet. Die erhaltenen Daten ergeben die Möglichkeit zur Verbindung der Experimente mit Modelschaumfilmen mit den Realprozessen in Realsystemen.

Keywords:: foam films; foam; alkylethoxysulfate; alkylbenzene sulfonic acid
Schlüsselwörter: Schaumfilme; Schaum; Alkylethoxysulfat; Alkylbenzensulfonsäure
1Evgeniya Hristova, Institute of Physical Chemistry, Bulgarian Academy of Sciences, Acad.G.Bonchev Str., bl. 11, Sofia 1113, Bulgaria, E-mail:

Acad. Dotchi Exerowa, Ph.D., Dr. Sc., is a Head of Department of Colloid & Interface, Institute of Physical Chemistry, Bulgarian Academy of Sciences. She has two monographs (one of them published by Elsevier, Amsterdam – “Foam and Foam Films”, 1998), over 200 papers in the field of physical chemistry of surfaces, thin liquid films, disperse systems and biomedicine; more than 2000 citations in the specialized international scientific journals.

Assoc. Prof. Kristo Khristov, Ph.D., Head of the Foam Research Group in the Colloid & Interface Department, Institute of Physical Chemistry, Bulgarian Academy of Sciences. Dr Khristov has more then 50 papers in the area of foam and thin liquid films, cited more than 300 times (including in books and monographs).

Evgeniya Hristova was born in 1970. She graduated from the University of Sofia, Faculty of Chemistry in 2001. In 2003 she enrolled as PhD student with the Department of Colloid & Interface Science, Institute of Physical Chemistry, Bulgarian Academy of Sciences.

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Received: 2004-11-24
Published Online: 2013-05-08
Published in Print: 2005-09-01

© 2005, Carl Hanser Publisher, Munich

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
  6. Dynamic Surface Tension: Industrial Applications and Characterisation of Commercial Surfactants*
  7. New Detergency Aspects through Visualisation of Soil Release Polymer Films on Textile Surfaces
  8. Physical Chemistry
  9. Foam Film Characterization of Commercial Surfactants and their Mixtures
  10. Alkali Metal Cationization of Alkyl Glucosides under Electrospray Ionization Conditions
  11. Conductivity of Strontium Soaps in Water
  12. Surface and Foaming Properties of Alkylamine Oxide: Protonation and Counterion Effects
  13. Synthesis
  14. Synthesis and Investigation of Surfactants to the Purpose of Development of Fire Extinguishing Substances and Organisation of their Production in Ukraine*
  15. Preparation and Surface Activities of Novel Sodium Sulfated Aryl Oleic Acid Alkanolamides
  16. Synthesis and Surfactant Properties of New Ester-capped Poly(oxyalkylated) Alcohols
  17. Laudation
  18. Heinz Hoffmann
https://doi.org/10.3139/113.100262
Keywords for this article
foam films; foam; alkylethoxysulfate; alkylbenzene sulfonic acid

Articles in the same Issue

  1. Contents/Inhalt
  2. Contents
  3. Abstracts
  4. Abstracts
  5. Application
  6. Dynamic Surface Tension: Industrial Applications and Characterisation of Commercial Surfactants*
  7. New Detergency Aspects through Visualisation of Soil Release Polymer Films on Textile Surfaces
  8. Physical Chemistry
  9. Foam Film Characterization of Commercial Surfactants and their Mixtures
  10. Alkali Metal Cationization of Alkyl Glucosides under Electrospray Ionization Conditions
  11. Conductivity of Strontium Soaps in Water
  12. Surface and Foaming Properties of Alkylamine Oxide: Protonation and Counterion Effects
  13. Synthesis
  14. Synthesis and Investigation of Surfactants to the Purpose of Development of Fire Extinguishing Substances and Organisation of their Production in Ukraine*
  15. Preparation and Surface Activities of Novel Sodium Sulfated Aryl Oleic Acid Alkanolamides
  16. Synthesis and Surfactant Properties of New Ester-capped Poly(oxyalkylated) Alcohols
  17. Laudation
  18. Heinz Hoffmann
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