Berlin 2005 – scientific programme
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CPP: Chemische Physik und Polymerphysik
CPP 30: POSTER: Chemical physics
CPP 30.49: Poster
Tuesday, March 8, 2005, 16:30–18:30, Poster TU D
Polymer – surfactant interactions: Effect of surfactant concentration on polymer conformation and aggregation size — •J.B. Stanislaus1, H. Zettl1, J. Crassous2, L. Li2, O. Korenberg3, M. Gottlieb3, M. Ballauff2, and G. Krausch1 — 1Physical Chemistry II, Universität Bayreuth, Universitätstraße 30, 95440, Bayreuth. — 2Physical Chemistry I, Universität Bayreuth, Universitätstraße 30, 95440, Bayreuth. — 3Department of Chemical Engineering, Ben–Gurion University of the Negev, Israel.
Association between polymers and surfactants has drawn much attention in the last decades. Mixed aggregates are formed already at low surfactant concentration, and can change the solution properties dramatically. This in turn affords a variety of industrial applications (cosmetics, paints,. etc). In this work we study a system containing an anionic surfactant sodium dodecyl sulphate (SDS) and a non ionic polymer methylcellulose (MC) in water. Fluorescence correlation spectroscopy(FCS) is used to study the dynamics of the aggregates. We are able to follow the change of the solution properties over a wide concentration range of both polymer and surfactant. The maximum aggregation of MC and SDS is linearly dependent on MC concentration. The results are compared to Small Angle X-ray Scattering (SAXS) and rheology measurements.