Micro-pore silicon carbide fiber and preparing method thereof

A microporous silicon carbide and fiber technology, applied in spinning solution preparation, fiber chemical characteristics, melt spinning, etc., can solve the problems of low specific surface area, difficult to obtain practical application value, low fiber specific surface area, etc. The effect of high and wide practical application value
CN100572622CInactive Publication Date: 2009-12-23NAT UNIV OF DEFENSE TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAT UNIV OF DEFENSE TECH
Publication Date
2009-12-23
Estimated Expiration
Not applicable · inactive patent

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Abstract

Microporous silicon carbide fiber and method for preparing same. The microporous silicon carbide fiber is characterized in that the Si content is 40-65wt%, the C content is 25-45wt%, and the balance is O, in the form of continuous fibers, and the volume of micropores (pore diameter≤2nm) accounts for 85vol% of the total pore volume Above, the average pore diameter is 1.30-2.00nm, and the specific surface area is 1100-2100m2 / g. The preparation method is characterized in that the C-rich silicon carbide fiber is firstly prepared by polycarbosilane and carbonaceous polymer blend spinning, non-melting, and cracking, and then the microporous silicon carbide fiber is obtained by activating the C removal process. The microporous silicon carbide fiber of the present invention has high micropore volume content, stable pore size, is not easy to collapse, high specific surface area, high temperature resistance, good oxidation resistance, and has good applications in the fields of environmental management, energy storage, medicine and health, etc. prospect.
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Description

technical field

[0001] The invention relates to a microporous material and a preparation method thereof, in particular to a microporous silicon carbide fiber and a preparation method thereof. Background technique

[0002] Macroporous and mesoporous materials are mainly used as catalyst carriers, filtering macromolecular substances, heat insulation, heat preservation, and sound insulation materials, etc., while microporous materials are mostly used in the fields of adsorption, separation of small molecular substances, and energy storage. Microporous materials are It has been a research hotspot in recent years and has high hopes in the fields of environmental governance, medicine and health, and energy storage.

[0003] Inorganic non-metallic microporous materials have become the focus of research due to their good stability, temperature resistance and corrosion resistance. Among them, the most researched microporous materials are mainly carbon materials, such as super activat...

Claims

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