Berlin 2018 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 51: Hydrogels and Microgels
CPP 51.7: Vortrag
Mittwoch, 14. März 2018, 16:45–17:00, C 264
Alternative acrylamides for microgel synthesis — •Yvonne Hertle1, Jörn Lessmeier1, Johanna Grote2, Lars Wiehemeier1, Tilman Kottke1, Sergej Kakorin1, and Thomas Hellweg1 — 1Physical and Biophysical Chemistry, Bielefeld University, Bielefeld, Germany — 2Inorganic and Structural Chemistry, University Bielefeld, Bielefeld, Germany
Microgels made of poly(N-isoproplyacrylamide) (pNiPAM) are one of the most frequently used and studied polymer based systems in the field of soft matter. Due the LCST (lower critical solution temperature) of pNiPAM in water at about 32°C, microgels made of this polymer are suitable candidates for a wide variety of applications like nanoparticle and drug carriers, sensors, nanoactuators, chemical separation media or biochemical applications as cell culture media.
Since the monomer NiPAM and its relative N-isoproplymethacrylamide (NiPMAM) are commercially available, other homologous acrylamides need to be synthesized. Therefore, the Schotten-Baumann reaction published by Hirano et al. for the synthesis of N-n-propylacylamide (NnPAM) is well suited [1]. Based on this we established a synthesis route to obtain a wide variety of acrylamide monomers. From these homopolymer microgels and different copolymer particles have then been prepared via a conventional precipitation polymerization with surfactant and characterized with respect to their phase transition behaviour, particle size and composition.
[1] B. Wedel, Y. Hertle, O. Wrede, J. Bookhold and T. Hellweg, Polymers, 8, 2016, 162.