Dresden 2017 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 51: Poster: Charged Soft Matter, Polyelectrolytes, Ionic Liquids
CPP 51.3: Poster
Mittwoch, 22. März 2017, 18:30–21:00, P3
Charge transport in monomeric vs. polymerized ionic liquids — •Felix Wieland1, Wolf Hiller2, Alexei Sokolov3, Roland Böhmer1, and Catalin Gainaru1 — 1Fakultät Physik, Technische Universität Dortmund, D-44221 Dortmund, Germany — 2Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, D-44221 Dortmund, Germany — 3Department of Chemistry, University of Tennessee, Knoxville, Tennessee 37996, USA
Polymerized ionic liquids have been recently receiving the attention of scientific community as potential candidates for energy-storage materials in industrial applications [1] but also as testing ground for polymer research in general. In this work we analyze the variation of charge dynamics in monomeric, oligomeric, and long-chain ionic melts by means of dielectric spectroscopy, rheology, and field-gradient nuclear magnetic resonance. In this respect the length of the positively charged backbone is systematically increased while the type of anions and their concentration are kept invariant. Surprisingly, indications of a clear decoupling between the dynamics corresponding to positive and negative charges occur already for oligomeric chains comprising two to three monomeric units only. Our investigation aims at describing the evolution of transport parameters with the degree of polymerization and also at providing a general picture of the conductivity mechanism in ionic and polymerized ionic liquids [2].
[1] Fan, F. et al. Macromolecules 48 (13), 4461-4470 (2015). [2] Gainaru, C. et al. J. Phys. Chem. B 120 (42), 11074-11083 (2016).