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Carbon aerogel prepared from chitin aerogel and preparation method thereof

A technology of carbon airgel and chitin, applied in the field of carbon airgel and its preparation, can solve the problems of low specific surface area and single hole of carbon airgel, achieve high porosity, increase use value, and reduce environmental pollution Effect

Active Publication Date: 2016-04-20
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problems that the carbon airgel obtained in the process of preparing carbon airgel by using petrochemical raw materials has a single hole and a low specific surface, and provides a carbon airgel prepared by using chitin airgel. Glue and its preparation method

Method used

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  • Carbon aerogel prepared from chitin aerogel and preparation method thereof
  • Carbon aerogel prepared from chitin aerogel and preparation method thereof
  • Carbon aerogel prepared from chitin aerogel and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041]1. Rinse the discarded shrimp shells, dry them and crush them through an 80-mesh sieve to obtain biomass powder;

[0042] 2. Take 1g of crushed shrimp skin, first use petroleum ether ethanol to extract at a ratio of 2:1, remove some organic matter, and purify the shrimp skin by KOH treatment to remove impurities such as protein, and then use glacial acetic acid to adjust pH = 4.5 and add 1wt%NaClO 2 Bleaching at 75°C for 2 hours;

[0043] 3. Prepare the bleached shrimp skin as a 1wt% dispersion, and obtain a 1wt% thick chitin dispersion by mechanical disc grinding;

[0044] 4. Add the phosphate buffer solution to the above dispersion liquid, adjust the pH of the dispersion liquid to 7, stir on a magnetic stirrer at 500 rpm, at room temperature and pressure for 10 min, to better disperse chitin;

[0045] 5. Then add TEMPO and NaClO, disperse evenly and then add NaClO 2 , TEMPO:NaClO:NaClO 2 The molar ratio is 1:10:100, and the container is quickly sealed and heated to...

Embodiment 2

[0051] 1. Rinse the industrially discarded crab shells, dry them, and crush them through an 80-mesh sieve to obtain crab shell powder; take 1g of the crushed crab shell powder, and first use benzene:ethanol to extract at a ratio of 2:1 to remove some organic matter. Then use NaOH treatment to remove impurities such as protein to purify the crab shells, and then use glacial acetic acid to adjust pH=4.5 by adding 1wt% NaClO 2 Bleached by heating at 75°C for 2 hours, then washed to neutrality, prepared as a 1wt% solution, and stored at 4°C;

[0052] 2. Take 400mL of the above dispersion, stir evenly, add 300mL of phosphate buffer solution with pH=6.8, adjust the pH of the dispersion to 6.8±0.2.

[0053] 3. Then add TEMPO and NaClO, disperse evenly and then add NaClO 2 , TEMPO:NaClO:NaClO 2 The molar ratio is 1:10:100, and the container is quickly sealed and heated to 80°C for 3 hours. After the reaction is completed, 20 mL of ethanol is added to terminate the reaction;

[0054...

Embodiment 3

[0059] 1. The industrial waste shrimp skin is crushed through an 80-mesh sieve to obtain the shrimp skin powder;

[0060] 2. Take 1g of crushed shrimp skin powder, first use phenylethanol to extract at a ratio of 2:1 to remove some organic matter, then use NaOH treatment to remove impurities such as protein to purify the shrimp skin, and then use glacial acetic acid to adjust the pH=4 condition Add 1.5wt% NaClO under 2 Heated at 80°C for 1.5h to bleach, then washed to neutrality, made into a 1wt% solution, and stored at 4°C;

[0061] 3. Take 400mL of the above dispersion liquid, stir it evenly, add TEMPO and NaBr directly, after the dispersion is even, add NaClO, the molar ratio of TEMPO:NaBr:NaClO is 1:10:30, react under stirring, use 0.1~5mol / L NaOH Control the pH of the dispersion at 10±0.2, react for 3 hours, add 20mL of ethanol to terminate the reaction;

[0062] 4. Repeatedly rinse the obtained dispersion with deionized water until it becomes neutral, and then use an u...

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Abstract

The invention discloses carbon aerogel prepared from chitin aerogel. Chitin nano-fiber aerogel is prepared by means of a mechanical method or a chemical oxidation method, and then the carbon aerogel is obtained through a method for carbonization under the inert gas shielding. The preparation method is simple, the technology is easy to control, the adopted oxidizing agent is the environment-friendly green solvent and is safe and free of toxicity, the green preparation technology is achieved, the cost is lowered, the obtained carbon aerogel is free of toxicity, the 3D network structure is obtained, the surface area is large, the porosity is high, and the certain mechanical strength is achieved.

Description

technical field [0001] The invention relates to carbon airgel, in particular to a carbon airgel prepared by using chitin airgel and a preparation method thereof. Background technique [0002] Airgel is generally made of resorcinol and formaldehyde, hydroquinone and formaldehyde, phloroglucinol and formaldehyde, melamine and formaldehyde, mixed cresol and formaldehyde, phenol and furfural as raw materials, through sol-gel and superhydrolysis Solid materials with skeleton structure and pore structure below 100nm can be prepared by critical drying, etc., but the raw materials used in this method are petrochemical products, which are expensive and cause huge pollution to the environment. Biomass chitin airgel is made of industrial waste shrimp skin and crab shells, which is cheap and easy to get and reduces environmental pollution. Chitin airgel is a new type of nano-porous solid material with a three-dimensional network structure. It has low density, high specific surface area...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCC01P2002/72C01P2002/82C01P2004/03
Inventor 卢芸刘波叶贵超郭娟姜笑梅尹江苹殷亚方
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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