Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2015年第1期
论文作者：Xiaoqian Wang Kewei Wang Jie Kong Yiguang Wang Linan An
文章页码：120 - 124
摘 要：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 ℃ to form random polysilazane-polystyrene copolymers.The copolymers were then pyrolyzed at 500 ℃ 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 than500 m2/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 multiscaled porous non-oxide materials.
Xiaoqian Wang1,2，Kewei Wang1,2，Jie Kong3，Yiguang Wang1,2，Linan An4
1. State Key Laboratory of Solidification Processing,Northwestern Polytechnical University2. Science and Technology on Thermo structural Composite Materials Laboratory,Northwestern Polytechnical University3. Department of Applied Chemistry,School of Science,Northwestern Polytechnical University4. Department of Materials Science and Engineering,Advanced Materials Processing and Analysis Center,University of Central Florida
摘 要：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 ℃ to form random polysilazane-polystyrene copolymers.The copolymers were then pyrolyzed at 500 ℃ 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 than500 m2/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 multiscaled porous non-oxide materials.
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