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Scattering from Dilute and Lamellar Phase Solutions of Aerosol-OT Simultaneous Probe of Surface Structures and Bulk
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Materials Physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy.
2011 (English)In: Trends in colloid andinterface science XXIV / [ed] Viktor Starov, Karel Procházka, 2011, Vol. 138, 139-142 p.Conference paper, Published paper (Refereed)
Abstract [en]

The benefits of simultaneous studies of adsorbed layers and bulk structures are shown for solutions of the surfactant Aerosol-OT. Above the critical micelle concentration, Aerosol-OT forms an aligned lamellar phase at the sapphire/solution interface which is in equilibrium with a bulk phase that consists of coexisting micellar solution and dispersed lamellar phase. Measurements of the aligned surface layers and the bulk scattering from a 2% wt solution by grazing incidence and small-angle neutron scattering show that the bulk consist of lamellar structures with the same d-spacing as seen at the surface but without the surface induced alignment. The surface lamellar structure corresponds to a 10% volume fraction for a 2% wt bulk which implies that there must be coexistence of regions of different concentration. Scattering patterns measured in grazing incidence geometry clearly show the relative contributions from small-angle scattering and specular reflectivity.

Place, publisher, year, edition, pages
2011. Vol. 138, 139-142 p.
Series
Progress in Colloid and Polymer Science, ISSN 0340-255X ; 138
Keyword [en]
sodium bis 2-ethylhexyl sulfosuccinate, lamellar phase, scattering
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-160883DOI: 10.1007/978-3-642-19038-4_24ISI: 000295091800024ISBN: 9783642190377 (print)OAI: oai:DiVA.org:uu-160883DiVA: diva2:453430
Conference
24th Meeting of the European-Colloid-and-Interface-Society (ECIS), September 5-10, 2010, Prague, Czech Republic
Available from: 2011-11-02 Created: 2011-11-02 Last updated: 2011-11-02Bibliographically approved

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Hellsing, Maja S.Rennie, Adrian R.Englund, Carl-Johan

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