Berlin 2018 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

CPP: Fachverband Chemische Physik und Polymerphysik

CPP 37: Focus: Smart Hydrogels and Hydrogel Based Devices II - organized by Gerald Gerlach, Walter Richtering and Thomas Hellweg

CPP 37.7: Vortrag

Mittwoch, 14. März 2018, 11:45–12:00, C 130

Influence of the surface confinement on the structural properties of adsorbed microgel particles — •Tetyana Kyrey^1,2, Judith Witte¹, Regine von Klitzing³, Stefan Wellert¹, and Olaf Holderer² — ¹Technische Universität Berlin, Berlin, Germany — ²JCNS at MLZ, Garching, Germany — ³Technische Universität Darmstadt, Darmstadt, Germany

In the last few decades a lot of work was devoted to investigate stimuli-responsive *smart* polymer systems. The main feature of such systems is their ability to rapidly react to an external stimulus such as temperature, light or solvent quality. Of special interest are stimuli responsive polymer systems at interfaces. Due to surface confinement their ability to dramatically change the characteristic sizes is limited. In the current work, the structural properties of adsorbed individual poly(N-isopropylacrylamide)(PNIPAM) microgel particles on Si-blocks by means of AFM, neutron reflectometry and grazing incidence small-angle neutron scattering (GISANS) are investigated. We discuss PNIPAM microgel particles in dependence on the crosslinker content (N,N-methylenebisacrylamide, 0.5 and 5%) at temperatures below and above the volume phase transition temperature (VPTT). The influence of the surface confinement on the swelling process and possibility to form individual particles on the surface at the different crosslinker content are presented.