Method, product and application of cellulose/sodium alginate composite airgel prepared from bamboo shoot leftovers

A technology of composite aerogel and sodium alginate, applied in the field of biomass aerogel materials, can solve the problems of difficult cellulose, limited application value of single cellulose aerogel, etc., achieve mild reaction conditions, easy industrial operation, A wide range of effects

Active Publication Date: 2022-04-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Cellulose is difficult to dissolve in common solvents due to its unique chemical structure, and a single cellulose aerogel has limited application value in various occasions

Method used

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  • Method, product and application of cellulose/sodium alginate composite airgel prepared from bamboo shoot leftovers
  • Method, product and application of cellulose/sodium alginate composite airgel prepared from bamboo shoot leftovers
  • Method, product and application of cellulose/sodium alginate composite airgel prepared from bamboo shoot leftovers

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Experimental program
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Effect test

Embodiment 1

[0047] The leftovers of bamboo shoots were washed with clear water, sliced ​​into slices, dried at 80°C for 24 hours, and then pulverized with a mill to pass through a 60-mesh sieve to obtain bamboo shoot powder. Weigh 60g of bamboo shoot powder, add deionized water according to the mass ratio of solid to liquid 1:30, heat at 80°C for 50min and then filter, repeat the operation 3 times and then dry at 80°C for 18h. Add deionized water to the obtained product according to the mass ratio of solid to liquid 1:20, then add sodium chlorite with the same mass as the product, adjust the pH to 4 with glacial acetic acid, bleach at 75°C for 2 hours, then add deionized water to terminate the reaction , washed with a large amount of deionized water until neutral, and then dried at 70°C for 18h to obtain bamboo shoot cellulose heddle fibers. Bamboo shoot cellulose heald fibers and 10% potassium hydroxide solution are mixed evenly according to the mass volume ratio of 1g:10ml, after alkali...

Embodiment 2

[0050] The leftovers of bamboo shoots were washed with clear water, sliced ​​into slices, dried at 80°C for 24 hours, and then pulverized with a mill to pass through a 60-mesh sieve to obtain bamboo shoot powder. Weigh 60g of bamboo shoot powder, add deionized water according to the mass ratio of solid to liquid 1:30, heat at 80°C for 50min and then filter, repeat the operation 3 times and then dry at 80°C for 18h. Add deionized water to the obtained product according to the mass ratio of solid to liquid 1:20, then add sodium chlorite with the same mass as the product, adjust the pH to 4 with glacial acetic acid, bleach at 75°C for 2 hours, then add deionized water to terminate the reaction , washed with a large amount of deionized water until neutral, and then dried at 70°C for 18h to obtain bamboo shoot cellulose heddle fibers. Bamboo shoot cellulose heald fibers and 10% potassium hydroxide solution are mixed evenly according to the mass volume ratio of 1g:10ml, after alkali...

Embodiment 3

[0053] The leftovers of bamboo shoots were washed with clear water, sliced ​​into slices, dried at 80°C for 24 hours, and then pulverized with a mill to pass through a 60-mesh sieve to obtain bamboo shoot powder. Weigh 60g of bamboo shoot powder, add deionized water according to the mass ratio of solid to liquid 1:30, heat at 80°C for 50min and then filter, repeat the operation 3 times and then dry at 80°C for 18h. Add deionized water to the obtained product according to the mass ratio of solid to liquid 1:20, then add sodium chlorite with the same mass as the product, adjust the pH to 4 with glacial acetic acid, bleach at 75°C for 2 hours, then add deionized water to terminate the reaction , washed with a large amount of deionized water until neutral, and then dried at 70°C for 18h to obtain bamboo shoot cellulose heddle fibers. Bamboo shoot cellulose heald fibers and 10% potassium hydroxide solution are mixed evenly according to the mass volume ratio of 1g:10ml, after alkali...

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Abstract

The invention discloses a method, product and application for preparing cellulose / sodium alginate composite airgel by using leftovers of bamboo shoots. The method includes: (1) processing the leftovers of bamboo shoots to obtain bamboo shoot powder; (2) removing the bamboo shoot powder (3) remove lignin; (4) remove hemicellulose to obtain bamboo shoot cellulose; (5) add bamboo shoot cellulose, sodium alginate and biologically active compounds to deionized water, and mix well , stirring and dispersing evenly; (6) adding calcium carbonate to the mixed solution obtained in step (5) and fully stirring and dispersing evenly, utilizing gluconolactone to adjust the pH of the mixed solution to neutral, and standing at room temperature to obtain a gel; (7) Pre-freeze the gel obtained in step (6), and freeze-dry it in a vacuum freeze dryer to obtain the cellulose / sodium alginate composite airgel. The process route of the method of the invention is simple and feasible, the preparation time is short, the industrial operation is easy, and the application prospect is broad.

Description

technical field [0001] The invention relates to the technical field of biomass airgel materials, in particular to a method, product and application for preparing cellulose / sodium alginate composite airgel by using leftovers of bamboo shoots. Background technique [0002] China is the country with the richest bamboo resources and is known as the "Kingdom of Bamboo". Bamboo shoots are swollen buds and young stems formed by the germination and differentiation of buds on the bamboo whip or stem base. In recent years, with the popularization and application of high-yield cultivation techniques for bamboo shoot forests and dual-purpose bamboo shoot forests, the production of fresh bamboo shoots in my country has developed. Swift. Bamboo shoots are rich in cellulose, and have the nutritional characteristics of high protein, low fat, and low starch. They are not only a food with high nutritional value, but also a rich source of agricultural and forestry cellulose. [0003] The proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/28C08L1/02C08L5/04A61K9/00A61K47/36A61K47/38B82Y5/00
CPCC08J9/28A61K9/0087A61K47/38A61K47/36B82Y5/00C08J2301/02C08J2305/04
Inventor 张辉张爱萍
Owner ZHEJIANG UNIV
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