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Surface interactions in emulsion and liposome solutions
YKI – Ytkemiska institutet.
YKI – Ytkemiska institutet.
1999 (English)In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, ISSN 0927-7757, E-ISSN 1873-4359, Vol. 159, p. 149-157Article in journal (Refereed)
Abstract [en]

We have used two surface force techniques to investigate the interactions between hydrophilic and negatively charged mica and glass surfaces across concentrated and dilute oil-in-water emulsions, as well as across aqueous liposome solutions. It was observed with both the interferometric surface force apparatus, using mica surfaces, and with the non-interferometric MASIF technique, employing glass surfaces, that emulsion droplets adsorbed onto the surfaces. Under a high compressive force the adsorbed emulsion droplets were disintegrated and this resulted in a phase separation in the gap between the surfaces. The forces measured in the presence of the capillary condensate compared favourably with theoretical expectations. In contrast, no adsorption of large aggregates could be detected in the liposome solution. Instead it appears that upon adsorption the liposomes disintegrate and the surfaces become covered by a disordered layer of phospholipids. Measurements with the interferometric surface force apparatus, that allows absolute distances to be determined, allow us to draw the conclusion that some bilayer aggregates are adsorbed and that the inner layer consists of an intercalated monolayer.

Place, publisher, year, edition, pages
1999. Vol. 159, p. 149-157
Keywords [en]
Surface forces, capillary forces, emulsion, liposome, adsorption, mica surfaces, glass surfaces
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-26451OAI: oai:DiVA.org:ri-26451DiVA, id: diva2:1053453
Note
A1249Available from: 2016-12-08 Created: 2016-12-08 Last updated: 2017-11-29Bibliographically approved

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