Effect of ionic strength on the relation between foam film stability and interfacial composition of polyelectrolyte/surfactant mixtures
The stability of foam films in polyelectrolyte/surfactant mixtures determines the efficiency of many of the product formulations we use in our everyday life including cleaning products and foodstuffs. A clear correlation between foam film stability and the surface tension of such mixtures, however, has been badly missing. Our recent work on FIGARO has related the foam film stability to the changing interfacial composition with respect to the bulk composition - one paper was published and another manuscript is in preparation. Indeed on FIGARO the interfacial composition can now be resolved with much higher precision than ever before by exploiting its 'low Q analysis' approach. Therefore now we propose to exploit this capability by extending the project to examine the effects of ionic strength on the two systems studied to date - one involving a rather flexible and the other a rather stiff polyelectrolyte - and a plant protein. These precise and efficient measurements should allow us to extend the parameter space significantly by understanding the relation between foam film stability and the bulk/interfacial compositions with respect to the ionic strength for the first time.
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BRAUN Larissa; Richard A. Campbell; LOEHMANN Oliver; UHLIG Martin and VON KLITZING Regine. (2016). Effect of ionic strength on the relation between foam film stability and interfacial composition of polyelectrolyte/surfactant mixtures. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-453
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