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Comparison between interaction forces at air/liquid interfaces in the presence of non-ionic surfactants
KTH, Superseded Departments, Chemistry.
2004 (English)In: Tenside Surfactants Detergents, ISSN 0932-3414, Vol. 41, no 4, 174-179 p.Article in journal (Refereed) Published
Abstract [en]

Interactions in thin liquid foam films and between solid/liquid surfaces coated with the non-ionic surfactant hexaoxyethylene dodecylether (C12E6) were investigated with TFPB (thin film pressure balance) and the MASIF (Measurement and Analysis of Surface Interaction Forces) technique, respectively. For foam films the formation of common black films (CBF) and Newton black films (NBF) was observed depending on the surfactant concentration and the applied pressure. With increasing surfactant concentration and increasing pressure the CBF is destablized, whereas a stabilization of the NBF is observed. In addition, MASIF measurements with two different hydrophobic surfaces were made. In one case silanated glass surfaces and in the other case thiolated gold surfaces were used. Differences and similarities of the interactions between these two surfaces are shown and discussed. Furthermore, the results of the MASIF measurements are compared with the ones of the thin films pressure balance measurements and the influence of the surfactant concentration on the interactions is discussed.

Place, publisher, year, edition, pages
2004. Vol. 41, no 4, 174-179 p.
Keyword [en]
thin liquid films, TFPB, MASIF, stability of colloids, disjoining pressure, surface forces, surface charges, non ionic surfactants, octyl-beta-glucoside, hydrophobic surfaces, air/water interface, disjoining pressure, foam films, layer, water, adsorption, repulsion, distance
National Category
Chemical Sciences
URN: urn:nbn:se:kth:diva-23901ISI: 000225312100004ScopusID: 2-s2.0-5744248342OAI: diva2:342600

QC 20100525 QC 20111101

Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2014-12-15Bibliographically approved

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