Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 8: Hydrogels and Microgels

CPP 8.5: Vortrag

Montag, 7. März 2016, 16:30–16:45, H40

Linear thermoresponsive surface coatings based on acrylamide microgels — Oliver Wrede, Johannes Bookhold, Marian Cors, and •Thomas Hellweg — Bielefeld University, Germany

Polymer coatings are used in a wide range of applications, such as anti fouling, enhancement of wetting abilities or corrosion protection. Combined with stimuli-responsive materials like acrylamide based microgels even more implemantations are possible. In these microgels, an external stimulus like temperature, pH or ionic strength leads to a response in the particle size. To implement the particles into systems like sensors or nanoactuators, a well known and precise control of the stimuli response must be obtained. Therefore, we investigated complex microgel architectures obtained by a two-step synthesis protocol. These exhibit a reversible linear size response upon a temperature stimulus. Even if the particles are deposited onto surfaces, this linear dependency of the size on the temperature is still preserved. The properties of the particles and therefore those of the resulting surfaces can be modified by selecting specific conditions during the synthesis (surfactant concentration, cross linker content, etc.). Creating tailor-made surfaces that fullfill the demands of future applications is therefore possible.