静电纺聚碳硅烷制备SiOC超细纤维

doi:10.15541/jim20170153

无机材料学报 ›› 2018, Vol. 33 ›› Issue (3): 357-362.DOI: 10.15541/jim20170153 CSTR: 32189.14.10.15541/jim20170153

所属专题：药物载体与防护材料

• • 上一篇

静电纺聚碳硅烷制备SiOC超细纤维

吴楠^{1, 2}, WAN Lynn Yuqin², 王应德¹, FRANK KO²

1. 国防科技大学, 长沙 410073;
2. 不列颠哥伦比亚大学, 温哥华 V6T 1Z4

收稿日期:2017-04-05 出版日期:2018-03-20 网络出版日期:2018-03-12
作者简介:吴楠. E-mail: lierenwn@163.com

Electrospun Silicon Oxycarbide Ultrafine Fibers Derived from Polycarbosilane

WU Nan^{1, 2}, WAN Lynn Yuqin², WANG Ying-De¹, FRANK KO²

1. Science and Technology on Advanced Ceramic Fibers and Composites Laboratory, National University of Defense Technology, Changsha 410073, China;
2. Department of Materials Engineering, the University of British Columbia, Vancouver, Canada, V6T 1Z4

Received:2017-04-05 Published:2018-03-20 Online:2018-03-12
About author:WU Nan (1989-), male, candidate of PhD. E-mail: lierenwn@163.com
Supported by:
National Natural Science Foundation of China (51173202)

摘要/Abstract

摘要：

以聚碳硅烷(PCS)为先驱体, 采用静电纺丝法和先驱体转化法制备SiOC超细纤维, 研究PCS溶液浓度和表面活性剂对纤维形貌和直径的影响。实验结果表明: 添加表面活性剂后, 纤维分布均匀, 串珠现象消失; 通过调节溶液中PCS比例, 纤维直径分布范围为500~900 nm。力学性能测试表明SiOC纤维毡的抗拉强度可达8.88 MPa。SiOC超细纤维毡也展现出优异的热稳定性和抗化学腐蚀性能, 在苛刻环境中可以作为催化剂载体和过滤材料使用。

关键词: 静电纺丝, 聚碳硅烷, 硅氧碳, 陶瓷纤维

Abstract:

Silicon oxycarbide (SiOC) ultrafine fibers with uniform distribution were prepared via electrospinning of polycarbosilane (PCS)/polystyrene followed by oxidation and pyrolysis at 1100℃. The diameter of SiOC fibers ranged from 500 to 900 nm through adjusting PCS concentration. The average tensile strength of SiOC fiber mat was 8.88 MPa. The obtained SiOC fibers also displayed outstanding thermal stability and chemical resistance, making them promising materials as smart filters and catalyst supports in harsh environment.

Key words: electrospinning, polycarbosilane, silicon oxycarbide, ceramic fibers

中图分类号:

TQ174

吴楠, WANLynnYuqin, 王应德, FRANKKO. 静电纺聚碳硅烷制备SiOC超细纤维[J]. 无机材料学报, 2018, 33(3): 357-362.

WU Nan, WAN Lynn Yuqin, WANG Ying-De, FRANK KO. Electrospun Silicon Oxycarbide Ultrafine Fibers Derived from Polycarbosilane[J]. Journal of Inorganic Materials, 2018, 33(3): 357-362.

图/表 5

Fig. 1 SEM images of (a) as-spun PS/PCS fibers without SDS, (b) as-spun PS/PCS fibers with SDS, (c) pre-oxidized PS/PCS fibers, and (d) SiOC-15 fibers after pyrolysisInsets are the corresponding digital pictures

Fig. 2 SEM images, diameter distribution and corresponding EDS spectra of (a, b) SiOC-9, (c, d) SiOC-15 and (e, f) SiOC-21

Fig. 3 (a) XPS survey, (b) C1s, (c) Si2p and (d) O1s spectra of SiOC-15

Fig. 4 Tensile strength of SiOC-9, SiOC-15 and SiOC-21. The right of pictures are the corresponding SEM images of breaking section

Fig. 5 Stability test results(a) TGA curve of SiOC-15 in air, with inset showing SEM image after heating at 500℃ in air for 1 h; (b) SEM image of SiOC-15 after immersing in 1 mol/L H2SO4 solution at 90℃ for 36 h; (c) SEM image of SiOC-15 after immersing in 6 mol/L KOH at 90℃ for 36 h; (d) XRD patterns of SiOC-15 after different treatments

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静电纺聚碳硅烷制备SiOC超细纤维

Electrospun Silicon Oxycarbide Ultrafine Fibers Derived from Polycarbosilane

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