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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 50: Poster Session III
CPP 50.16: Poster
Dienstag, 17. März 2020, 14:00–16:00, P1C
Adsorption of Magnetic Nanoparticles onto PNIPAM Brushes and Structure of Composite Materials — •Philipp Ritzert1, Dikran Boyaciyan1, Luca Silvi2, Olaf Solfwedel1, Larissa Braun1, and Regine v. Klitzing1 — 1TU Darmstadt, Department of Physics, Hochschulstrasse 8, D-64289 Darmstadt — 2Helmholtz-Zentrum Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, D-14109, Berlin
End-grafted polymer chains, covalently bound to a substrate are commonly referred to as polymer brushes. In recent decades, great attention was paid to their investigation as thin surface coating, due to their versatile applicability, as well as, high mechanical and chemical stability. The usage of various monomer units enables sensitivity to external stimuli (e.g. temperature, pH value) [1]. Furthermore, polymer brushes can bind different kinds of material with a high selectivity, depending on the available functional groups. Recent studies demonstrate in-situ synthesis of magnetic nanoparticles in polymer brushes resulting in sensitivity to external magnetic fields [2].
In this work, the adsorption behaviour of citric acid-capped, magnetic nanoparticles (MNPs) onto Poly(N-isopropylacrylamide) brushes is investigated. Thereby, pH value and MNP concentration during the attachment are varied. Moreover, the structure of the resulting composite materials is investigated by neutron reflectometry.
[1] S. Christau et al. Macromolecules, 2017, 50, pp. 7333-7343
[2] W. Choi et al. Advanced Materials, 2008, 20, pp. 4504-4508