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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 51: Charged Soft Matter II

CPP 51.1: Vortrag

Donnerstag, 3. April 2014, 15:00–15:15, ZEU 118

Temperature-driven structural and morphological changes in multicompartment responsive films — •Samantha Micciulla and Regine von Klitzing — Tu Berlin

Responsive coatings are promising candidates to create switchable hydrophilic/hydrophobic surfaces, substrates for cell proliferation/detachment or highly selective uptake/release matrices and still preserve macroscopic properties of the substrate. Polymers are very suitable for this purpose, since many systems can be prepared through simple and well established synthetic routes by varying functionalities and constituent materials. In order to design multifunctional systems, more complex coatings are required. Therefore very recently the combination of grafted and physisorbed polymers has been proposed. Despite structure and properties of each single constituent are known, mutual effects could strongly alter them, hence systematic investigations are required. The mentioned aspects were investigated on a multicompartment matrix made of a thermoresponsive P(NIPAM-b-DMAEMA) block copolymer grafted from silica substrate. After quaternization to convert the methacrylate from weak to strong polyelectrolyte, the film is capped with PSS/PDADMAC polyelectrolyte multilayers by dipping. Ellipsometry measurements in water were carried out to monitor the temperature-induced phase transition of the matrix, while Atomic Force Microscopy was used to detect the morphogical changes. Finally, the coating of such polymer films by aluminium oxide revealed some fundamental rules governing the interaction between organic and inorganic materials.