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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 13: Composites and Functional Polymer Hybrids
CPP 13.9: Vortrag
Montag, 27. März 2023, 17:30–17:45, ZEU 255
Tunable mesoporous zinc titanate films via diblock copolymer-directed cooperative self-assembly and a sol-gel technique — •Yanan Li1, Nian Li1, Shanshan Yin1, Constantin Harder2, Yusuf Bulut2, Apostolos Vagias3, Stephan V. Roth2,4, and Peter Müller-Buschbaum1,3 — 1TUM School of Natural Sciences, Chair for Functional Materials, 85748 Garching, Germany — 2DESY, 22607 Hamburg, Germany — 3MLZ, TUM, 85748 Garching, Germany — 4Department of Fiber and Polymer Technology, KTH, SE-100 44 Stockholm, Sweden
Mesoporous ordered films have broad applications ranging from sensors to supercapacitors and biodevices due to their large specific surface area and pore accessibility of their porous nanostructures. Here, we investigate the evolution and formation mechanisms of morphologies of mesoporous zinc titanate films obtained by changing the ratio of two inorganic precursors after calcining hybrid films consisting of organic-inorganic materials. The amphiphilic diblock copolymer self-assembles into micelles in a mixture of N,N-dimethylformamid/hydrogen chloride playing the role as structure directing template. The inorganic precursors are loaded in the micellar shell due to hydrogen bonds between PEO and precursors. We combine a sol-gel route with a spin coating to prepare hybrid films, and investigate the influence of the different weight fractions of precursors and polymer concentration on the film morphologies. The inner and surface morphologies of the hybrid films are characterized using grazing incidence small-angle X-ray scattering and scanning electronic microscopy, respectively.