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A kind of preparation method of high-strength carbon airgel

A carbon airgel, high-strength technology, applied in the direction of nano-carbon, can solve the problems of carbon airgel composite material cracks, affecting material strength and performance, low mechanical strength, etc., to achieve improved cohesion, excellent toughness, and mechanical strength. The effect of performance improvement

Active Publication Date: 2020-06-23
山东新朗华科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is aimed at the low mechanical strength and high brittleness of the traditional carbon aerogel, while the common oxide fiber or foam carbon reinforcement system and the precursor of the carbon aerogel shrink inconsistently during the carbonization process, resulting in Cracks occur inside the carbon airgel composite material, which affects the strength and performance of the material, and provides a preparation method for high-strength carbon airgel

Method used

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  • A kind of preparation method of high-strength carbon airgel

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example 1

[0025] Weighing fresh lotus root, removing the joints, putting it into a tissue grinder and pulverizing for 30 minutes to obtain ground lotus root, then mixing the ground lotus root with water at a mass ratio of 1:3, grinding and pulverizing with a stone mill, and obtaining lotus root pulp; Rinse the above-mentioned lotus root slurry with water for 2 days, stir once a day, remove the upper layer of lotus root residue and the lower layer of sediment after the lotus root slurry is clarified, and obtain the middle layer of lotus root starch slurry, then put the lotus root slurry into a gauze bag, hang it and drain it naturally, Take out the drained lotus root powder, spread it flat on a stainless steel tray, and dry it in the sun until the moisture content of the lotus root powder is 3%, that is, the self-made lotus root powder; weigh the loofah and put it in a jet mill for 20 minutes to obtain loofah fragments. Mix the above-mentioned self-made lotus root powder and warm water at...

example 2

[0027]Weighing fresh lotus root, removing the joints, putting it into a tissue grinder and pulverizing for 35 minutes to obtain ground lotus root, then mixing the ground lotus root with water at a mass ratio of 1:3, grinding and pulverizing with a stone mill, and obtaining lotus root pulp; Rinse the above-mentioned lotus root slurry with water for 2 days, stir once a day, remove the upper layer of lotus root residue and the lower layer of sediment after the lotus root slurry is clarified, and obtain the middle layer of lotus root starch slurry, then put the lotus root slurry into a gauze bag, hang it and drain it naturally, Take out the drained lotus root powder, spread it flat on a stainless steel tray, and dry it in the sun until the moisture content of the lotus root powder is 4%, that is, the homemade lotus root powder; weigh the loofah and put it in a jet mill for 25 minutes to obtain loofah fragments. Mix the above-mentioned self-made lotus root powder and warm water at 2...

example 3

[0029] Weighing fresh lotus root, removing the joints, putting it into a tissue grinder and pulverizing for 40 minutes to obtain ground lotus root, then mixing the ground lotus root with water at a mass ratio of 1:3, grinding and pulverizing with a stone mill, and obtaining lotus root pulp; Rinse the above-mentioned lotus root slurry with water for 3 days, stir once a day, remove the upper layer of lotus root residue and the lower layer of sediment after the lotus root slurry is clarified, and obtain the middle layer of lotus root starch slurry, then put the lotus root slurry into a gauze bag, hang it and drain it naturally, Take out the drained lotus root powder, spread it flat on a stainless steel tray, and dry it in the sun until the moisture content of the lotus root powder is 5%, that is, the self-made lotus root powder; weigh the loofah and put it in a jet mill for 30 minutes to obtain loofah fragments. Mix the above-mentioned self-made lotus root powder and warm water at...

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Abstract

The invention discloses a method for preparing high-strength carbon aerogel, and belongs to the field of technologies for preparing aerogel. The method has the advantages that retinervus luffae fructus which is used as a precursor for carbon fibers is added into aerogel, the retinervus luffae fructus and the aerogel are simultaneously carbonized in carbonization procedures and are consistent in contraction, physical anchoring force can be generated between carbonized retinervus luffae fructus carbon fibers and the aerogel and is combined with physical network structures of the retinervus luffae fructus carbon fibers, accordingly, the high-strength carbon aerogel is excellent in toughness, the coherence of the high-strength carbon aerogel can be ultimately effectively improved, and the mechanical performance of the high-strength carbon aerogel can be improved; amorphous starch gel which covers the surface of retinervus luffae fructus fibers can be used as a cushion layer and is good incompatibility with the aerogel, tiny pores between the retinervus luffae fructus fibers and the high-strength carbon aerogel can be filled with carbonized particles of the amorphous starch gel, accordingly, the compactness between the high-strength carbon aerogel and retinervus luffae fructus carbon fiber reinforcers can be improved, the toughness and the mechanical strength of the high-strength carbon aerogel further can be improved, and the method has a broad application prospect.

Description

technical field [0001] The invention discloses a preparation method of high-strength carbon airgel, which belongs to the technical field of airgel preparation. Background technique [0002] Carbon airgel is a lightweight, porous, amorphous, bulk nanocarbon material whose continuous three-dimensional network structure can be controlled and tailored at the nanoscale. It is a new type of aerogel with a porosity as high as 80-98%, a typical pore size of less than 50nm, and a network colloid particle diameter of 3-20nm. [0003] Compared with traditional inorganic aerogels, carbon aerogels have many excellent properties and broader application prospects. Carbon airgel has the characteristics of good electrical conductivity, large specific surface area, and wide range of density variation, and is an ideal electrode material for the preparation of electric double layer capacitors. Carbon aerogels are the only aerogels that are electrically conductive and can be used as electric p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/15
CPCC01P2004/64C01P2006/90
Inventor 李巧珍张晶陈可
Owner 山东新朗华科技有限公司
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