| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Engineering Ceramics: Microstructure-Property-Performance Relations and Applications
|
| Presentation Title |
Polymer-Derived Silicon Oxycarbide – Exfoliated Montmorillonite Ceramic Nanocomposites for Porous Ceramics |
| Author(s) |
Advaith V. Rau, Kathy Lu |
| On-Site Speaker (Planned) |
Advaith V. Rau |
| Abstract Scope |
The amorphous/nanostructured nature of polymer-derived ceramics (PDCs) allows for synthesis of novel ceramic nanocomposites with 0D/1D nanomaterial reinforcements – however, PDCs reinforced with 2D nanomaterials have not been appreciably studied. Montmorillonite (MMT) is a naturally-occurring 2:1 layered clay comprised of stacked two-dimensional aluminosilicate sheets that are few nanometers in thickness. Clay-based reinforcements offer an inexpensive yet thermally-compatible material for high temperature ceramic systems, such as those in the silicon oxycarbide (SiOC) class of PDCs. MMT nanosheets were exfoliated from a crude clay source and twice-functionalized with cetritrimethylammonium bromide and [3-(2-aminoethylamino)propyl]trimethoxysliane to promote dispersion in the preceramic polymer. MMT-SiOC nanocomposites with 1/2/5 wt% MMT content were investigated as a function of pyrolytic temperature (900/1200/1400°C) to investigate phase evolution, porosity, and high temperature behavior of MMT nanosheets. |