Porous polysilazane-derived ceramic structures generated through photopolymerization-assisted solidification templating

Journal article


Publication Details

Author(s): Obmann R, Schoerpf S, Gorsche C, Liska R, Fey T, Konegger T
Journal: Journal of the European Ceramic Society
Publication year: 2019
Volume: 39
Journal issue: 4
Pages range: 838-845
ISSN: 0955-2219


Abstract

A novel approach to the preparation of porous polysilazane-derived ceramics is presented, combining nonaqueous solidification templating (freeze casting) of a liquid preceramic polymer with a photo-induced thiol-ene "click" reaction at temperatures below -10 degrees C. Upon directional solidification of the reaction mixture consisting of the preceramic polymer, a quaternary thiol, a photoinitiator, and camphene as pore-structuring agent, low-temperature photopolymerization of the preceramic polymer was achieved by irradiation with visible light, its feasibility demonstrated by photorheology. Effects of the polymer/structuring agent ratio and the solidification rate on porosity and pore morphology were evaluated using porosimetry and tomography techniques. The structural features were set in relation to mechanical properties, showing compressive strengths up to 74 MPa at porosities between 58% and 76%.


FAU Authors / FAU Editors

Fey, Tobias Dr.
Lehrstuhl für Werkstoffwissenschaften (Glas und Keramik)


External institutions
Technische Universität Wien


How to cite

APA:
Obmann, R., Schoerpf, S., Gorsche, C., Liska, R., Fey, T., & Konegger, T. (2019). Porous polysilazane-derived ceramic structures generated through photopolymerization-assisted solidification templating. Journal of the European Ceramic Society, 39(4), 838-845. https://dx.doi.org/10.1016/j.jeurceramsoc.2018.11.045

MLA:
Obmann, Richard, et al. "Porous polysilazane-derived ceramic structures generated through photopolymerization-assisted solidification templating." Journal of the European Ceramic Society 39.4 (2019): 838-845.

BibTeX: 

Last updated on 2019-22-02 at 15:08