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 Klitzing3 — 1TU 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.