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A preparation method of aromatic heterocyclic fiber-based nano-carbon fiber airgel material

A nano carbon fiber, aromatic heterocycle technology, applied in nano carbon, nano technology, nano technology and other directions, can solve the problems of low nitrogen content and poor toughness of carbon aerogel, achieve high porosity, low oxygen content, improve the use of range effect

Active Publication Date: 2020-02-11
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the technical problems of low nitrogen content and poor toughness of the carbon airgel prepared by the existing method, and provides a method for preparing an aromatic heterocyclic fiber-based nano-carbon fiber airgel material

Method used

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  • A preparation method of aromatic heterocyclic fiber-based nano-carbon fiber airgel material

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specific Embodiment approach 1

[0022] Embodiment 1: In this embodiment, a method for preparing an aromatic heterocyclic fiber-based nano-carbon fiber airgel material is specifically carried out in the following steps:

[0023] 1. Put aromatic heterocyclic fibers into N,N-dimethylformamide / absolute ethanol mixture, add KOH solid powder, and mechanically stir at room temperature to obtain aromatic heterocyclic nanofiber dispersion;

[0024] 2. Stir the aromatic heterocyclic nanofiber dispersion obtained in step 1, and add a gelling agent, continue to stir, and complete the gel; then, centrifuge the obtained gel, then age to obtain a wet gel; The glue is replaced in a replacement solvent to obtain an aromatic heterocyclic fiber-based nanofiber wet gel;

[0025] 3. The surface of the aromatic heterocyclic fiber-based nanofiber wet gel obtained in step 2 is covered with an organic solvent, and then put into a supercritical reactor for supercritical drying to obtain light yellow aromatic heterocyclic fiber-based ...

specific Embodiment approach 2

[0027] Specific embodiment two: the difference between this embodiment and specific embodiment one is: the aromatic heterocyclic fiber described in step one is polyphenylene terephthalate fiber, polyparaphenylene benzobisoxazole fiber, polyparaphenylene One of phenylene pyridine imidazole fibers and polyimide fibers or a mixture of several of them. Others are the same as the specific embodiment one.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: N,N-dimethylformamide and anhydrous The volume ratio of ethanol is (90~999):(10~1). Others are the same as the specific embodiment one or two

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Abstract

The invention relates to the field of preparation of carbon fiber aerogel materials, and particularly provides a preparing method of an aromatic heterocycle fiber-based nanometer carbon fiber aerogelmaterial. A technical problem to be solved is that carbon aerogel prepared by present methods is low in nitrogen content and poor in toughness. Aromatic heterocycle fiber dispersion is prepared from aromatic heterocycle fibers through a solution process, and is gelated through a method of promoting gelation with a reaction; then aromatic heterocycle fiber aerogel is prepared through a supercritical carbon dioxide drying process; and finally aromatic polyamide fiber-based nanometer carbon fiber aerogel is prepared through a carbonization process. Nanometer aromatic polyamide fibers contain thenitrogen element, and a certain amount of the nitrogen element can still be preserved in the carbon aerogel after carbonization, and therefore, in-situ doped nanometer carbon fiber aerogel can be directly produced by the method, thus laying a good foundation for preparation of an electrode material of a supercapacitor. The method is used for preparing the aromatic heterocycle fiber-based nanometercarbon fiber aerogel.

Description

technical field [0001] The invention relates to the field of preparation of carbon fiber airgel materials. Background technique [0002] With the development of social economy, traditional materials can no longer meet people's needs in industry and life, and people urgently need to develop new multifunctional materials. Airgel is such a material with many excellent properties, which has a very broad prospect. Airgel is a solid nanoporous material with extremely low density, even close to air. It is known as the lightest solid material in the world, and it is also called "frozen smoke". Due to its three-dimensional porous network structure and fine skeleton, aerogel has a high specific surface area and high porosity, making it an outstanding contribution in the fields of heat insulation, dielectric, wave transmission, adsorption and catalyst carrier. [0003] At present, there are three main drying methods for airgel: atmospheric drying, freeze drying and supercritical dryi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15C04B38/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01B32/15C04B38/0045
Inventor 黎俊李怀宇王立军胡桢刘丽黄玉东
Owner HARBIN INST OF TECH