Dresden 2014 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 54: Poster Session 3

CPP 54.59: Poster

Donnerstag, 3. April 2014, 15:00–19:00, P2

Smart surfaces from stimuli-responsive microgels via spin coating — •Johannes Bookhold, Bastian Wedel, and Thomas Hellweg — Universität Bielefeld, Universitätsstraße 25, Bielefeld, Germany

Stimuli-responsive nano- and microgels are in the focus of interest for a number of applications, such as sensors, drug-delivery and surface coatings. Among these colloidal particles temperature responsive microgels based on poly(n-isopropylacrylamide) (pNIPAm) are the most intensive studied systems. These microgels exhibit a reversible volume phase transition (VPT) at a temperature near the lower critical solution temperature (LCST) at about 305 K. For most applications a huge advantage of pNIPAm based microgels is that their properties and the external stimuli they respond to can be modified via copolymerization. The resulting properties of the particles can be predicted depending on the used comonomer. The production of coatings and thin films with tailor-made properties from microgels is especially interesting for applications in medical and biological research.

A general, reliable, fast and easy production process for thin films and surface coatings consisting of such microgels is a desirable goal. One already well established method in the field of surface coatings that can offer these features is spin coating. Therefore the access to a variety of microgel coatings and films showing different properties via spin coating is within the focus of this work. Manufactured coatings were characterized using ellipsometry, atomic force microscopy (AFM) and scanning electron microscopy (SEM).