Direct Preparation of High Surface Area Mesoporous SiC-Based Ceramic by Pyrolysis of a Self-Assembled Polycarbosilane-block-Polystyrene Diblock Copolymer
SCIE
SCOPUS
- Title
- Direct Preparation of High Surface Area Mesoporous SiC-Based Ceramic by Pyrolysis of a Self-Assembled Polycarbosilane-block-Polystyrene Diblock Copolymer
- Authors
- Nghiem, QD; Kim, DP
- Date Issued
- 2008-06-10
- Publisher
- AMER CHEMICAL SOC
- Abstract
- Direct pyrolysis of a self-assembled inorganic-organic block copolymer can be a promising route for fabricating the ordered ceramic nanostructures based on the achievements of organic-organic block copolymers. Here we report the synthesis of a novel polycarbosilane-block-polystyrene diblock copolymer by ring-opening living anionic polymerization in a THF and n-hexane solvent system at similar to 48 degrees C. The resulting block copolymer revealed phase-separation behavior in the nanoscale to form a self-assembled nanostructure that was converted to a mesoporous ceramic phase after heating at 800 degrees C. The pyrolyzed ceramic product exhibited well-ordered mesoporous SiC-based ceramic structures with a high BET surface area of 1325 m(2) g(-1) and an average mesopore size of 7.8 nm containing a large amount of micropores.
- Keywords
- CARBON; PRECURSOR; TRANSFORMATION; NANOTUBES; SILICA; ROUTE; FILMS; SIOC
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/16076
- DOI
- 10.1021/CM702688J
- ISSN
- 0897-4756
- Article Type
- Article
- Citation
- CHEMISTRY OF MATERIALS, vol. 20, no. 11, page. 3735 - 3739, 2008-06-10
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.