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Preparation method of chitosan-beta-cyclodextrin adsorbent

A technology of beta cyclodextrin and chitosan, which is applied in the field of preparation of chitosan-beta cyclodextrin adsorbent, can solve the problems of organic dye wastewater discharge and the like, and achieve the effect of good adsorption capacity

Inactive Publication Date: 2021-03-16
TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The existence of dyes makes our world colorful but also brings a lot of discharge of organic dye wastewater

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] Weigh a certain amount of chitosan and a certain amount of β-cyclodextrin in a proportion of β-cyclodextrin: chitosan = 2:1 and dissolve it in 1% acetic acid solution, and use mechanical stirring until the chitosan and β-cyclodextrin are mixed. The dextrin is completely dissolved and mixed well. The cross-linking agent glutaraldehyde was added under stirring conditions, and the reaction was carried out at 60 °C for 2 h. After the reaction, the obtained product was pre-frozen in a refrigerator for 12 hours, and finally dried in a vacuum freeze dryer. The dried product was repeatedly washed with sodium hydroxide and deionized water to remove acetic acid, and then dried to obtain the final product.

example 2

[0020] Weigh a certain amount of chitosan and a certain amount of β-cyclodextrin in proportion to β-cyclodextrin: chitosan = 1:1 and dissolve it in 1% acetic acid solution, and use mechanical stirring until the chitosan and β-cyclodextrin are mixed. The dextrin is completely dissolved and mixed well. The cross-linking agent glutaraldehyde was added under stirring conditions, and the reaction was carried out at 60 °C for 2 h. After the reaction, the obtained product was pre-frozen in a refrigerator for 12 hours, and finally dried in a vacuum freeze dryer. The dried product was repeatedly washed with sodium hydroxide and deionized water to remove acetic acid, and then dried to obtain the final product.

example 3

[0022] Weigh a certain amount of chitosan and a certain amount of β-cyclodextrin in a proportion of β-cyclodextrin: chitosan = 1:2 and dissolve it in 1% acetic acid solution, and use mechanical stirring until the chitosan and β-cyclodextrin are mixed. The dextrin is completely dissolved and mixed well. The cross-linking agent glutaraldehyde was added under stirring conditions, and the reaction was carried out at 60 °C for 2 h. After the reaction, the obtained product was pre-frozen in a refrigerator for 12 hours, and finally dried in a vacuum freeze dryer. The dried product was repeatedly washed with sodium hydroxide and deionized water to remove acetic acid, and then dried to obtain the final product.

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PUM

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Abstract

The invention relates to a preparation method of a chitosan -beta-cyclodextrin adsorbent. The chitosan-beta-cyclodextrin adsorbent comprises the following raw materials: acetic acid, chitosan, beta-cyclodextrin, glutaraldehyde, and deionized water. The preparation method comprises the following steps: firstly, uniformly mixing chitosan and beta-cyclodextrin in an acetic acid solution with a certain concentration, then adding a cross-linking agent to prepare a chitosan-beta-cyclodextrin composite material, and then forming pores in the composite material through a freeze-induced drying method.The three chitosan-beta-cyclodextrin adsorbents with different addition ratios are prepared.

Description

technical field [0001] The invention relates to a preparation method of a chitosan-beta cyclodextrin adsorbent. [0002] technical background [0003] Chitosan is a kind of homopolymer composed of 2-amino-2-deoxy-D-glucose monomers linked by β(1→4) glycosidic bonds. Due to its excellent biocompatibility, biodegradability, antibacterial and immunogenicity, and good adsorption, film-forming, biocompatibility and degradability of chitosan, it is widely used in medicine, wastewater treatment, fresh-keeping It has good application value in other fields. [0004] β-Cyclodextrin (β-CD) is composed of cyclic oligosaccharides (7 glucopyranose units) linked by α-1,4-type glycosidic bonds. The special molecular structure of "hydrophobicity and external hydrophilicity" makes it a host model that can interact with a series of guest molecules from inorganic, organic compounds, neutral and ionic compounds, and noble gases, etc., through host-guest recognition (hydrophobic , hydrogen bond...

Claims

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Application Information

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IPC IPC(8): B01J20/26C02F1/28B01J20/30C02F101/20C02F101/30
CPCB01J20/267C02F1/285C02F2101/20C02F2101/308
Inventor 赵梓年王永朕
Owner TIANJIN UNIVERSITY OF SCIENCE AND TECHNOLOGY
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