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
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[0040] Example 1:
[0041]1. Rinse the discarded shrimp shells, dry them and pulverize them through an 80-mesh sieve to obtain biomass powder;
[0042] 2. Take 1g of crushed small shrimp, first use petroleum ether ethanol to extract at a ratio of 2:1, remove some organic matter, and purify the small shrimp by KOH treatment to remove impurities such as protein, and then use glacial acetic acid to adjust pH=4.5. 1 wt% NaClO 2 Bleaching by heating at 75°C for 2h;
[0043] 3. The bleached shrimp peel is prepared into a 1wt% dispersion, and a 1wt% coarse chitin dispersion is obtained by mechanical disc grinding;
[0044] 4. Add the phosphate buffer solution to the above dispersion, adjust the pH of the dispersion to 7, and stir on a magnetic stirrer at 500 rpm for 10 min at normal temperature and pressure 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 was 1:10:100, and the container wa...
Example Embodiment
[0050] Example 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 1 g of the crushed crab shell powder, first extract it with benzene:ethanol 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 shell, and then use glacial acetic acid to adjust pH=4.5 and add 1wt% NaClO 2 Bleaching by heating at 75°C for 2h, then washing to neutrality, configuring into a 1wt% solution, and storing at 4°C;
[0052] 2. Take 400 mL of the above dispersion liquid, stir evenly, add 300 mL of phosphate buffer solution with pH=6.8, and adjust the pH of the dispersion liquid 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 a...
Example Embodiment
[0058] Example 3:
[0059] 1. Pulverize the industrially discarded shrimp skins through an 80-mesh sieve to obtain shrimp skin powder;
[0060] 2. Take 1g of crushed shrimp skin powder, first use phenylethanol to extract at 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 pH=4 conditions Add 1.5wt% NaClO 2 Heated at 80°C for 1.5h to bleach, then washed to neutrality, configured into a 1wt% solution, and stored at 4°C;
[0061] 3. Take 400 mL of the above dispersion liquid, add TEMPO and NaBr directly after stirring evenly, add NaClO after uniform dispersion, the molar ratio of TEMPO:NaBr:NaClO is 1:10:30, and react under stirring, using 0.1~5mol / L NaOH Control the pH of the dispersion at 10 ± 0.2, react for 3 hours, and add 20 mL of ethanol to terminate the reaction;
[0062] 4. The obtained dispersion was repeatedly washed with deionized water until neutral,...
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