Environmentally-sensitive hydrogel and method and application for preparing hydrogel by using bamboo shoot scraps

An environmentally sensitive, hydrogel technology, applied in the direction of chemical instruments and methods, non-effective components of polymer compounds, and other chemical processes, can solve problems such as environmental pollution and waste of resources, and achieve rich sources, stable adsorption performance, and responsive The effect of mild conditions

Inactive Publication Date: 2015-12-02
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] China is still a large agricultural country in development. With the progress of rural urbanization, the area of ​​arable land has decreased, and the primary agricultural products with very low added value are produced on this limited land, and a large number of Agricultural product processing waste residues are discarded or incinerated, which not only pollutes the environment but also wastes resources, resulting in a large amount of CO 2 with PM2.5 particle emissions

Method used

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  • Environmentally-sensitive hydrogel and method and application for preparing hydrogel by using bamboo shoot scraps
  • Environmentally-sensitive hydrogel and method and application for preparing hydrogel by using bamboo shoot scraps
  • Environmentally-sensitive hydrogel and method and application for preparing hydrogel by using bamboo shoot scraps

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Embodiment 1

[0049] A method for preparing environment-sensitive hydrogel from leftovers of bamboo shoots, specifically comprising the following steps:

[0050] (1) Bamboo shoot leftovers are washed with distilled water, dried at 70°C for 12 hours, cut into small pieces, pulverized by a pulverizer and passed through an 80-mesh sieve to obtain bamboo shoot residue powder, and the powder particle size is 0.1-0.6mm;

[0051] (2) Add distilled water to the bamboo shoot residue powder, the mass ratio of bamboo shoot residue powder and distilled water is 1:20, kill greens under the condition of 70 ℃ for 2h, passivate the active enzymes of bamboo shoots; add 10% glacial acetic acid to adjust the mass fraction pH to 3.8, add sodium chlorite and bleach at 80°C for 2 hours (mass ratio of sodium chlorite to bamboo shoot residue powder is 1:1);

[0052] (3) After bleaching, filter the insoluble flocculent in the solution, and wash it with distilled water until the filtrate is colorless, wash it with 9...

Embodiment 2

[0058] A method for preparing environment-sensitive hydrogel from leftovers of bamboo shoots, specifically comprising the following steps:

[0059] (1) After washing the leftovers of bamboo shoots, dry them at 70° C. for 12 hours, cut them into small pieces, and pulverize them through an 80-mesh sieve to obtain bamboo shoot residue powder with a particle size of 0.1-0.6 mm;

[0060] (2) Add distilled water to the bamboo shoot residue powder, the mass ratio of bamboo shoot residue powder and distilled water is 1:20, and kill green under the condition of 70 ℃ for 2h, passivate active enzymes of bamboo shoot; add mass fraction and be 10% glacial acetic acid adjustment pH to 3.8, add sodium chlorite and bleach at 80°C for 2 hours (mass ratio of sodium chlorite to bamboo shoot residue powder is 1:1);

[0061] (3) After bleaching, filter the insoluble flocculent in the solution, and wash it with distilled water until the filtrate is colorless, wash it with 90% ethanol solution for 4...

Embodiment 3

[0067] A method for preparing environment-sensitive hydrogel from leftovers of bamboo shoots, specifically comprising the following steps:

[0068] (1) Bamboo shoot leftovers are washed, dried at 70° C. for 12 hours, cut into small pieces, pulverized by a pulverizer and passed through an 80-mesh sieve to obtain bamboo shoot residue powder, and the powder particle size is 0.1-0.6 mm;

[0069] (2) Add distilled water to the bamboo shoot residue powder, the mass ratio of bamboo shoot residue powder and distilled water is 1:20, kill greens under the condition of 70 ℃ for 2h, passivate the active enzymes of bamboo shoots; add 10% glacial acetic acid to adjust the mass fraction pH to 3.8, add sodium chlorite and bleach at 80°C for 2 hours (mass ratio of sodium chlorite to bamboo shoot residue powder is 1:1);

[0070] (3) After bleaching, filter the insoluble flocculent in the solution, and wash it with distilled water until the filtrate is colorless, wash it with 90% ethanol solutio...

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Abstract

The invention belongs to the technical field of composite hydrogel and discloses environmentally-sensitive hydrogel and a method and application for preparing the hydrogel by using bamboo shoot scraps. The method for preparing the environmentally-sensitive hydrogel comprises the steps that firstly, cellulose is extracted from bamboo shoot craps, and then sodium chloroacetate is adopted for carboxymethylation modification; secondly, the carboxymethylated bamboo shoot cellulose and beta-cyclodextrin are added into an aqueous solution of 12% Urea/7%NaOH; thirdly, epoxy chloropropane is added for cross-linking reaction; finally, unreacted reagents are washed away through subsequent treatment, and freeze drying is performed, so that the hydrogel is prepared. The prepared hydrogel is sensitive to temperature, pH, saline solutions and organic solvent, and therefore the hydrogel can be applied in the field of cationic dye or the field of drug slow release materials. Besides, according to the method, the reaction conditions are mild, process routes are simple and practicable, and industrialized operation is easy.

Description

technical field [0001] The invention belongs to the technical field of composite hydrogel, and in particular relates to an environment-sensitive hydrogel and a method and application for preparing the environment-sensitive hydrogel by using leftovers of bamboo shoots. Background technique [0002] Qingyuan bamboo shoots (Dendrocalamus latiflorus, DL) is an edible plant with abundant resources and high yield. Bamboo shoots are the unique enlarged bud stems of bamboo in the early growth stage. It is tender and delicious, rich in essential amino acids, mineral elements, vitamins and fiber components that are difficult to be digested by the human body. It is a natural product with nutritional value. Ingredients. Due to the continuous promotion and application of bamboo shoots planted in woodlands in recent years, since 2010, 5-6 million tons of bamboo shoots have been produced every year, except for 40% of which are sold fresh, and the rest are used for the processing of canned...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L1/28C08L5/16C08B11/12A61K47/40B01J20/24B01J20/30
Inventor 黄惠华罗文超周萌刘智钧
Owner SOUTH CHINA UNIV OF TECH
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