Dynamics of Formation of Vesicles Studied by Highly Time-resolved Stopped-flow Experiments
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A. Barth
, I. Grillo und M. Gradzielski
Abstract
Phase behaviour and static structure of surfactant systems have been studied in much detail, but this applies much less so to their dynamic properties. Structural transitions in amphiphilic systems can be triggered by mixing different amphiphiles. Employing the stopped-flow technique we have studied the kinetics of formation of multilamellar vesicles starting from a micellar solution and a microemulsion containing a semipolar oil. This process has been investigated for various starting conditions and as a function of the charging of the amphiphilic system. The formation process is the faster the closer the starting solution is in composition to the final state and can be slowed down by the presence of ionic surfactant.
Kurzfassung
Phasenverhalten und statische Struktur von Tensidsystemen sind umfassend untersucht worden, aber das gilt sehr viel weniger für ihre dynamischen Eigenschaften. Strukturelle Änderungen amphiphiler Systeme können durch Mischen unterschiedlicher Amphiphile herbeigeführt werden. Mit Hilfe der Stopped-Flow-Methode untersuchten wir die Bildung multilamellarer Vesikel aus mizellarer Lösung und Mikroemulsion mit solubilisiertem Additiv. Dieser Prozess wurde für unterschiedliche Ausgangsbedingungen und als Funktion der Aufladung des Systems untersucht. Dabei zeigte sich, dass der Bildungsprozess umso schneller ist je geringer die Änderung der Zusammensetzung ist und dass er durch Zusatz eines ionischen Tensids verlangsamt werden kann.
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© 2010, Carl Hanser Publisher, Munich
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Environmental/Technical Chemistry
- Alkyl Polyglycoside-Sorbitan Ester Formulations for Improved Oil Recovery
- Novel Surfactants
- Photosynthesis-inhibiting Effects of Cationic Biodegradable Gemini Surfactants
- Synthesis and Characterization of a New Cationic Galactolipid with Carbamate for Gene Delivery
- Physical Chemistry
- Dynamics of Formation of Vesicles Studied by Highly Time-resolved Stopped-flow Experiments
- Ion Extractant as Cosurfactant at the Water-Oil Interface in Microemulsions
- Microemulsions with Mixed Nonionic Surfactants and Isopropylmyristate
- Micellization and Interfacial Behaviour of Amitriptyline-Nonionic Surfactant Systems in Aqueous Medium
- Synthesis
- Ordered Ferrocene-containing Mesoporous Materials with Tailor-made Pore Size
- Cleaning Technology
- Comparison of Standards for Testing Electrical Dishwashers or Dishwashing Detergents
- Manual Dishwashing – How can it be Optimized?
Artikel in diesem Heft
- Contents/Inhalt
- Contents
- Abstracts
- Abstracts
- Environmental/Technical Chemistry
- Alkyl Polyglycoside-Sorbitan Ester Formulations for Improved Oil Recovery
- Novel Surfactants
- Photosynthesis-inhibiting Effects of Cationic Biodegradable Gemini Surfactants
- Synthesis and Characterization of a New Cationic Galactolipid with Carbamate for Gene Delivery
- Physical Chemistry
- Dynamics of Formation of Vesicles Studied by Highly Time-resolved Stopped-flow Experiments
- Ion Extractant as Cosurfactant at the Water-Oil Interface in Microemulsions
- Microemulsions with Mixed Nonionic Surfactants and Isopropylmyristate
- Micellization and Interfacial Behaviour of Amitriptyline-Nonionic Surfactant Systems in Aqueous Medium
- Synthesis
- Ordered Ferrocene-containing Mesoporous Materials with Tailor-made Pore Size
- Cleaning Technology
- Comparison of Standards for Testing Electrical Dishwashers or Dishwashing Detergents
- Manual Dishwashing – How can it be Optimized?