Regensburg 2022 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 27: Composites and Functional Polymer Hybrids
CPP 27.4: Vortrag
Mittwoch, 7. September 2022, 12:15–12:30, H39
Morphology transformation pathway of block copolymer- directed cooperative self-assembly of ZnO hybrid films monitored in situ during slot-die coating — •Ting Tian1, Shanshan Yin1, Suo Tu1, Christian L. Weindl1, Kerstin S. Wienhold1, Suzhe Liang1, Matthias Schwartzkopf2, Stephan V. Roth2,3, and Peter Müller-Buschbaum1,4 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching — 2DESY, 22607 Hamburg — 3KTH, Department of Fibre and Polymer Technology, 10044 Stockholm, Sweden — 4MLZ, TU München, 85748 Garching
Co-assembly of diblock copolymers (DBCs) and inorganic precursors that takes inspiration from the rich phase separation behavior of DBCs can enable the realization of a broad spectrum of functional nanostructures with the desired sizes. In a DBC assisted sol*gel chemistry approach with polystyrene-block-poly(ethylene oxide) and ZnO, hybrid films are formed with slot-die coating. In situ GISAXS measurements are performed to investigate the self-assembly and co-assembly process during the film formation. Combining complementary ex situ characterizations, several distinct regimes are differentiated to describe the morphological transformations from the solvent-dispersed to solidified films. The comparison of the assembly pathway evidences that the key step in the establishment of the pure DBC film is the coalescence of spherical micelles toward cylindrical domains. Due to the presence of the precursor, the formation of cylindrical aggregates in the solution is crucial for the structural development of the hybrid film.