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Perforated Vesicles as Intermediate Structures in the Transition from Vesicles to Micelles in Dilute Aqueous Systems Containing Long Chain Alcohols and Ionic Surfactants.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Physical and Analytical Chemistry.
2009 (English)In: Journal of Dispersion Science and Technology, ISSN 0193-2691, E-ISSN 1532-2351, Vol. 30, no 6, 802-808 p.Article in journal (Refereed) Published
Abstract [en]

Morphologies of aggregates in mixtures of long chain alcohols (n-decanol, n-dodecanol, and oleyl alcohol) and cationic surfactants (cetylpyridinium chloride, cetyltrimethylammonium bromide, and chloride) in dilute aqueous salt solutions were investigated by cryogenic transmission electron microscopy. In all cases elongated micellar structures transformed into vesicles with increasing alcohol concentration. Perforated bilayer structures were clearly identified in systems with oleyl alcohol and CTAB, in particular in 0.100 M NaBr. Increasing the salt concentration to 0.200 M other aggregates dominated composed of threadlike, probably branched, and interconnected micelles. A gradual evolution of morphologies was observed with increasing alcohol content at the lower salt concentration: thread-like micelles (developing branching to some extent), perforated vesicles, coexisting perforated and smooth bilayer structures, only smooth bilayers, and finally also inverted strucutures.

Place, publisher, year, edition, pages
2009. Vol. 30, no 6, 802-808 p.
Keyword [en]
Cryogenic transmission electron microscopy, perforated bilayer, perforated vesicle, thread-like micelles, vesicle
National Category
Chemical Sciences
Research subject
Physical Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-105236DOI: 10.1080/01932690802643394ISI: 000266436200009OAI: oai:DiVA.org:uu-105236DiVA: diva2:220795
Available from: 2009-06-02 Created: 2009-06-02 Last updated: 2010-07-27Bibliographically approved

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