Berlin 2015 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 15: P1: Interfaces and Thin Films
CPP 15.15: Poster
Montag, 16. März 2015, 16:00–19:00, Poster A
Alginate - Chitosan Multilayer Films and Their Properties — •Hakan Kaygusuz1,2, F. Bedia Erim2, and Regine von Klitzing1 — 1Stranski-Laboratorium für Physikalische und Theoretische Chemie, Technische Universität Berlin, Strasse des 17. Juni 124, D-10623 Berlin, Germany — 2Department of Chemistry, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
Alginate and chitosan are oppositely charged polysaccharides, being anionic and cationic, respectively. These polysaccharides have many uses, both crosslinked and uncrosslinked. Negatively charged surfactant, sodium dodecyl sulfate (SDS), has effects on viscosity and mechanical properties of linear and crosslinked alginate structures. For example addition of SDS decreases the viscosity of the alginate solutions and increases the Young's modulus of crosslinked alginate gels. Therefore it is aimed to observe the ability of forming multilayer films with these materials and the effect of SDS on the film structure.
Multilayers of these polyelectrolytes were prepared using dip-coating method. The properties such as film thickness and roughness were characterized using ellipsometry, atomic force microscopy and X-ray reflectometry. The effect of sodium chloride and sodium dodecyl sulfate concentration, and the number of double layers on film properties were observed. The crosslinking and swelling ability of these films were discussed.