Understanding the properties of mixtures of rigid polyelectrolytes and surfactants at the air-water interface
The surface properties of polyelectrolyte (PE)/surfactant mixtures play an important role in the performance and stability of lots of colloidal dispersions in common consumer products (e.g. foams and emulsions). The interfacial composition and structure of flexible PE/surfactant mixtures have been investigated extensively over the years using neutron reflectivity (NR) measurements. We have recently completed a study on the relation between the interfacial composition and the foaming properties of a mixture involving a very flexible PE, PAMPS/C14TAB. Insight into the complex correlations was gained, but the influence of the polymer chain conformation on the surface properties and foam stability is not yet clear. Thus, we propose to build on the findings of the former studies by investigating the interfacial composition and structure of a rigid PE/surfactant mixture on FIGARO. The system is question is sulphonated poly(phenylene sulfone) (S220)/C14TAB mixtures: S220 is stiffer than in PAMPS but it has the same headgroup. We have complementary data on the system already, but the correlations with the interfacial composition are missing.
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UHLIG Martin; Richard A. Campbell; KREUER Klaus Dieter; LOEHMANN Oliver; VARGAS RUIZ Salome and VON KLITZING Regine. (2015). Understanding the properties of mixtures of rigid polyelectrolytes and surfactants at the air-water interface. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.9-12-381
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