Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors
Abbreviated Journal Title
J. Mater. Sci. Technol.
Non-oxide porous ceramics; Polymer-derived ceramics; Random copolymer; SIALCN CERAMICS; WATER-VAPOR; POLYMER; OXIDATION/CORROSION; ROUTES; PORES; Materials Science, Multidisciplinary; Metallurgy & Metallurgical; Engineering
In this paper, we reported a novel method for synthesis of non-oxide porous ceramics by using random copolymers as precursors. A silazane oligomer and styrene monomer were used as starting materials, which were copolymerized at 120 degrees C to form random polysilazane-polystyrene copolymers. The copolymers were then pyrolyzed at 500 degrees C to obtain porous ceramics by completely decomposing polystyrene (PS) and converting polysilazane (PSZ) into non-oxide Si-C-N ceramics. The obtained material contained a bi-model pore-structure consisting of both micro-sized and nano-sized pores with very high surface area of more than 500 m(2)/g. We also demonstrated that the pore structure and surface area of the materials can be tailored by changing the ratio of the two blocks. Current results suggest a promising simple method for making multi-scaled porous non-oxide materials.
Journal of Materials Science & Technology
"Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors" (2015). Faculty Bibliography 2010s. 6859.