| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
Controlled Synthesis, Processing, and Applications of Structural and Functional Nanomaterials
|
| Presentation Title |
Polymer Derived Hierarchically Porous Silicon Oxycarbide Ceramics through Bio-templating |
| Author(s) |
Ummen Sabu, Rajendra K Bordia |
| On-Site Speaker (Planned) |
Ummen Sabu |
| Abstract Scope |
Hierarchically porous SiOC ceramics were developed combining the polymer derived ceramic (PDC) synthesis route with the biotemplating strategy. The protein-based membranes extracted from eggshells were impregnated with preceramic polymer and pyrolyzed in an inert atmosphere. The pyrolyzed products retained the macroporous fibrous network of the biotemplate as observed in the SEM and TEM microstructural investigations. The influence of pyrolysis temperature on phase evolution and porosity was investigated through XRD and N2 adsorption-desorption studies. The formation of crystalline silicon carbide nanowires containing stacking faults was observed at temperatures greater than 1300 oC. The pyrolyzed products were also characterized through Raman and FTIR spectroscopy. The carbon-rich nature of the developed SiOC ceramics and the presence of SiC nanowires can overcome the inherent inferior conductivity of SiOC for electrochemical applications. This contribution presents an approach to combine PDC route and bio-templating to make porous nanostructured ceramics. |