Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors

doi:10.1016/j.jmst.2014.04.008

J. Mater. Sci. Technol. ›› 2015, Vol. 31 ›› Issue (1): 120-124.DOI: 10.1016/j.jmst.2014.04.008

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Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors

Xiaoqian Wang^{1, 2}, Kewei Wang^{1, 2}, Jie Kong³, Yiguang Wang^{1, 2, *}, Linan An⁴

1 State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an 710072, China; 2 Science and Technology on Thermostructural Composite Materials Laboratory, Northwestern Polytechnical University, Xi'an 710072, China; 3 Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi'an 710072, China; 4 Department of Materials Science and Engineering, Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, FL 32816, USA

Received:2013-11-09 Online:2015-01-20 Published:2015-07-23
Contact: * Corresponding author. Prof., Ph.D.; Tel.: +86 29 88494914; Fax: +8629 88494620; E-mail address: wangyiguang@nwpu.edu.cn (Y. Wang).
Supported by:
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 21174112 and 51242009), the Research Fund of State Key Laboratory of Solidification Processing (Grant No. 82-TZ-2013), and the project “111” (B08040). J. Kong thanks the grant of the New Century Excellent Talents of Education Ministry of China (NCET-11-0817).

Abstract

Abstract: 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 °C to form random polysilazane-polystyrene copolymers. The copolymers were then pyrolyzed at 500 °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 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 multi-scaled porous non-oxide materials.

Key words: Non-oxide porous ceramics, Polymer-derived ceramics, Random copolymer

Xiaoqian Wang, Kewei Wang, Jie Kong, Yiguang Wang, Linan An. Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors[J]. J. Mater. Sci. Technol., 2015, 31(1): 120-124.

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Synthesis of Non-oxide Porous Ceramics Using Random Copolymers as Precursors

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