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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 21: Poster II
CPP 21.1: Poster
Tuesday, March 19, 2024, 18:00–20:00, Poster E
Tailoring Mesoporous Film Morphologies in Zinc Titanate Oxide via PS-b-PEO Guided Cooperative Self-Assembly — •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 surface-to-volume ratio and pore accessibility of their porous nanostructures. Here, we investigate the morphology evolutions and formation mechanisms of the morphologies of mesoporous zinc titanate oxide films obtained by changing the ratios of two inorganic precursors after calcining hybrid films consisting of organic-inorganic materials. The amphiphilic diblock copolymer self-assembles into micelles in a solvent mixture playing the role of the structure-directing template. The inorganic precursors are loaded in the micellar shell due to hydrogen bonds between poly(ethylene oxide) 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.
Keywords: amphiphilic diblock copolymers; zinc titanate oxide; mesoporous Film; sol-gel