Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 17: Poster Session I
CPP 17.38: Poster
Montag, 1. April 2019, 17:30–19:30, Poster B1
Self-assembly of large nanoparticles in ultrahigh molecular weight linear diblock copolymer films — •Wei Cao1, Senlin Xia1, Xinyu Jiang1, Michael Appold2, Matthias Opel3, Markus Gallei2, Matthias Schwartzkopf4, Stephan V. Roth4,5, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2TU Darmstadt, Ernst-Berl-Institute for Technical and Macromolecular Chemistry, 64287 Darmstadt — 3Walther-Meissner-Institut, Bayerische Akademie der Wissenschaften, 85748 Garching — 4DESY, Notkestrasse 85, 22603 Hamburg — 5KTH Royal Institute of Technology, SE-100 44 Stockholm, Sweden
The preparation of block copolymer nanocomposite films that consist of nanoparticles (NPs) with diameters (D) of more than 10 nm is a challenging task. Herein, ultrahigh molecular weight (UHMW) linear polystyrene-block-poly(methyl methacrylate) (PS-b-PMMA) diblock copolymer was spin-coated as a template for the self-assembly of large iron oxide NPs (D = 28.5 nm), and the morphology of hybrid nanocomposites was governed by the concentration (C) of the iron oxide NPs. Via hydrogen bonding between the carboxylic acid groups on iron oxide and the PMMA side chains of the diblock copolymers, the NPs were selectively incorporated inside the PMMA cylinders. Due to the rearrangement of the PMMA chains for accommodating the NPs, well-ordered cylindrical nanostructure were readily generated at low NP concentrations (C = 0.5 wt%). Most interestingly, a chain-like network appears inside the hybrid films at a high NP loading.