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Berlin 2005 – scientific programme

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CPP: Chemische Physik und Polymerphysik

CPP 8: SYMPOSIUM: Polymer networks and beyond: From molecular structure to materials and biological functions III

CPP 8.7: Talk

Saturday, March 5, 2005, 16:15–16:30, TU C243

Application of ”Smart” PNIPAM microgels as sensor or actuator — •Thomas Hellweg1, Frieder Mugele2 und Regine von Klitzing31TU Berlin, Stranski-Laboratorium,Strasse des 17.Juni 112, D-10623 Berlin — 2Universität Ulm, Abteilung Angewandte Physik, D-89069 Ulm — 3MPI-KGF, Potsdam-Golm,14424 Potsdam

The bulk swelling behavior of copolymer microgel particles is compared to the swelling behavior of adsorbed particles. The transition temperature of these microgel particles is found to be ≈ 32 C. Microgel particles adsorbed onto a solid substrate still display a similar reversible volume phase transition as their dissolved counterparts. However, their swelling ratio α is reduced by approximately one order of magnitude compared to the bulk value. Nevertheless, the effect is sufficiently large to make the particles suitable for applications as sensors and actuators.
In addition first results for microgel layers embedded in polyelectrolyte multilayers are presented. These new materials are promising with respect to senosric applications.

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