Regensburg 2013 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 9: Poster: Interfaces and Thin Films (joint session with DECHEMA and VDI)

CPP 9.14: Poster

Monday, March 11, 2013, 17:30–19:30, Poster C

Combination of grafted and adsorbed polymer chains on solid surface for the creation of multicompartmental responsive coatings — •Samantha Micciulla and Regine von Klitzing — Stranski-Lab für Physikalische u. Teoretische Chemie, Technische Universität Berlin, Germany

Responsive coatings are of interest for a large number of researchers due to their applicability as highly tunable release systems. Functionality and structural properties allow for the creation of systems which respond to many different stimuli, like pH, temperature, ionic strength and light. The combination of grafted and physisorbed blocks in an unique matrix has been object of studies in the last few years. The design of such coatings arises fundamental questions, for instance which materials and geometries can be successfully combined, which properties are induced from the complex assembly and how the responsiveness is consequently affected. Task of our study is to clarify the mentioned aspects. The system under investigation is prepared by grafting thermoresponsive polymers on silica surface, which is used as macroinitiator for the growth of a strong polyelectrolyte block, onto which polyelectrolyte multilayers are adsorbed. The "grafting from" performed by Surface Initiated Atom Transfer Radical Polymerization allows for controlled chain growth and low polydispersity. The adsorption is performed by dipping the substrate in oppositely charged polyelectrolyte solutions. Sample characterization is carried out by combining Ellipsometry, Atomic Force Microscopy, Contact angle and X-Rays Reflectometry, while responsive properties are monitored by Ellipsometry.