Publikationen

Micro-/mesoporous polymer-derived ceramic structures using molecular porogens

Autor(en)
Thomas Konegger, Herwig Peterlik, Rajendra K. Bordia
Abstrakt

Micro- and mesoporous ceramics demonstrate promising properties for applications in energy- and environment-related fields. Due to their high thermal and chemical stability, they are particularly suited for separation in harsh thermal or chemical environments, e.g. as membrane materials for the separation of gas mixtures. In this work, we present the use of a preceramic poly(vinyl)silazane in combination with organic molecular porogens for the generation of micro-/mesoporous non-oxide ceramic structures. Microporosity is generated during the pyrolytic conversion process, while the addition of molecular porogens, to be removed during the heat-treatment, enables further control of the micro-/mesopore structure. A systematic investigation of various porogens showed the suitability of polystyrene for this purpose. Based on these findings, the pore structure and pore connectivity of polysilazane/polystyrene-derived structures were evaluated using gas physisorption and small angle X-ray scattering techniques. This material was further investigated by preparing asymmetric membranes consisting of micro-/mesoporous polysilazane/polystyrene-derived layers on porous ZrO2/TiO2 supports. The potential for gas separation applications was then demonstrated by single-gas permance evaluation of the generated structures at temperatures up to 300°C.

Organisation(en)
Dynamik Kondensierter Systeme, Fakultätszentrum für Nanostrukturforschung
Externe Organisation(en)
Technische Universität Wien, Clemson University
Seiten
310-316
Anzahl der Seiten
7
DOI
https://doi.org/10.4028/www.scientific.net/KEM.742.310
Publikationsdatum
2017
Peer-reviewed
Ja
ÖFOS 2012
Kondensierte Materie
Schlagwörter
ASJC Scopus Sachgebiete
, ,
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/micromesoporous-polymerderived-ceramic-structures-using-molecular-porogens(d5cef173-08f7-44fc-8a4e-7c1386d42c2a).html