NDLI: Highly flexible, erosion resistant and nitrogen doped hollow SiC fibrous mats for high temperature thermal insulators

Content Provider	Royal Society of Chemistry (RSC)
Author	Kim, Hak Yong Park, Mira Liu, Yang Chae, Suhyeong Choi, Woo Cheal Lee, Jinpyo Liu, Yanan Kim, Byoung-Suhk
Copyright Year	2017
Abstract	Thermally stable and chemical resistant silicon carbide (SiC) fibrous mats have drawn much attention as a high-temperature thermal insulator in top end equipment and technology. Herein, novel free-standing, flexible, acid/alkali-resistant and nitrogen doped (N-doped) hollow SiC fibrous mats bearing ultralow thermal conductivity are reported. The materials were fabricated via a three-step process: the preparation of core–shell fibers from polymeric precursors by co-axial electrospinning, the thermal or electron beam irradiation curing process and pyrolysis process. The as-obtained continuous fibers manifested an oval-shape hollow structure and the thickness of the cavity wall was approximately 1.5 μm. The crystal pattern was obtained after pyrolysis over 1300 °C under a nitrogen atmosphere. The morphology, composition, curing and formation mechanisms of N-containing hollow SiC fibers with texture and porous surfaces were elaborately analysed. These facilely fabricated N-doped hollow SiC fibrous mats possess good flexibility, noninflammability, high thermal stability, erosion resistance, light weight (0.218 g cm−3) and low thermal conductivity at high temperature (0.039 W m−1 K−1), suggesting promising application as a high temperature thermal insulator.
Starting Page	2664
Ending Page	2672
Page Count	9
File Format	HTM / HTML PDF
ISSN	20507488
Volume Number	5
Issue Number	6
Journal	Journal of Materials Chemistry A
DOI	10.1039/c6ta09475a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Silicon carbide Thermal insulation Acid Nitrogen Thermal conductivity Electrospinning Pyrolysis Cavity wall Micrometre
Content Type	Text
Resource Type	Article
Subject	Chemistry Renewable Energy, Sustainability and the Environment Materials Science

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