Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 61: Interfaces and Thin Films I (joint session CPP/DY, organized by CPP)
CPP 61.6: Vortrag
Donnerstag, 10. März 2016, 17:45–18:00, H51
Adsorption Behavior of a rigid Polyelectrolyte/Surfactant Mixture at the Air/Liquid Interface and its Influence on Foam Film Stability — •Martin Uhlig1, Andreas Wohlfarth2, Klaus-Dieter Kreuer2, and Regine v. Klitzing1 — 1Technische Universität Berlin — 2Max-Planck-Institut für Festkörperforschung, Stuttgart
The properties of foams are of interest for many industrial applications such as enhanced oil recovery and in personal care products and are therefore the subject of many studies. To control and manipulate the properties of a foam, it is essential to understand the behavior of the single building blocks, the so-called foam films. A way to produce stable foam films is to mix surfactants with oppositely charged polyelectrolytes, as highly surface-active complexes can be formed with the two compounds. Extensive research on such mixtures was already performed with the focus on very flexible Polyelectrolytes, as PSS and PAMPS. However, it is still unclear what the influence of the backbone rigidity of the polyelectrolyte on the resulting foam film properties is. In this work a mixture of a newly synthesized polyelectrolyte (S220) with a stiffer backbone is used and mixed with the catanionic surfactant C14TAB. The system has been investigated by means of surface tension measurements, surface elasticity, foam film stability measurements and neutron reflectometry. Those measurements have shown a much higher surface activity and foam stability for the S220/C14TAB mixture then for mixtures with more flexible polyelectrolytes.