Foam Film Characterization of Commercial Surfactants and their Mixtures
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E. Hristova
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.
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© 2005, Carl Hanser Publisher, Munich
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Application
- Dynamic Surface Tension: Industrial Applications and Characterisation of Commercial Surfactants*
- New Detergency Aspects through Visualisation of Soil Release Polymer Films on Textile Surfaces
- Physical Chemistry
- Foam Film Characterization of Commercial Surfactants and their Mixtures
- Alkali Metal Cationization of Alkyl Glucosides under Electrospray Ionization Conditions
- Conductivity of Strontium Soaps in Water
- Surface and Foaming Properties of Alkylamine Oxide: Protonation and Counterion Effects
- Synthesis
- Synthesis and Investigation of Surfactants to the Purpose of Development of Fire Extinguishing Substances and Organisation of their Production in Ukraine*
- Preparation and Surface Activities of Novel Sodium Sulfated Aryl Oleic Acid Alkanolamides
- Synthesis and Surfactant Properties of New Ester-capped Poly(oxyalkylated) Alcohols
- Laudation
- Heinz Hoffmann
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Application
- Dynamic Surface Tension: Industrial Applications and Characterisation of Commercial Surfactants*
- New Detergency Aspects through Visualisation of Soil Release Polymer Films on Textile Surfaces
- Physical Chemistry
- Foam Film Characterization of Commercial Surfactants and their Mixtures
- Alkali Metal Cationization of Alkyl Glucosides under Electrospray Ionization Conditions
- Conductivity of Strontium Soaps in Water
- Surface and Foaming Properties of Alkylamine Oxide: Protonation and Counterion Effects
- Synthesis
- Synthesis and Investigation of Surfactants to the Purpose of Development of Fire Extinguishing Substances and Organisation of their Production in Ukraine*
- Preparation and Surface Activities of Novel Sodium Sulfated Aryl Oleic Acid Alkanolamides
- Synthesis and Surfactant Properties of New Ester-capped Poly(oxyalkylated) Alcohols
- Laudation
- Heinz Hoffmann
