Multi-amino modified cyclodextrin and application thereof

A cyclodextrin and polyamino technology, which is applied to polyamino modified cyclodextrin and its application fields, can solve the problems of structural damage, poor comprehensive performance of hydrogel water treatment, decreased adsorption capacity, etc., and achieves the effect of sensitive capture

Inactive Publication Date: 2020-08-07
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive performance of the hydrogel prepared by this method is poor, and it is easy to be polluted by microorganisms, resulting in structural damage and a decrease in adsorption capacity.

Method used

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  • Multi-amino modified cyclodextrin and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of chelated heavy metal ion amino, carboxylate and nano-titanium dioxide with photocatalyst effect, and its preparation method is as follows:

[0025] a. Preparation of polyamino-modified cyclodextrin containing double bonds: disperse 6 parts of α-cyclodextrin into 12 parts of water, then slowly add 8 parts of 13% potassium hydroxide aqueous solution to the system until the system is transparent to obtain solution I ; 10 parts of p-toluenesulfonyl chloride and 15 parts of acetonitrile were added to the reactor, and solution I was added dropwise therein, and the addition was completed in 0.5 h, and the reaction was continued for 4 h at room temperature, and the reaction was terminated and suction filtered, and the filtrate was placed in the refrigerator overnight, a large amount of white precipitate was separated out, and the ...

Embodiment 2

[0028] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of chelated heavy metal ion amino, carboxylate and nano-titanium dioxide with photocatalyst effect, and its preparation method is as follows:

[0029] a. Preparation of polyamino-modified cyclodextrin containing double bonds: disperse 5 parts of γ-cyclodextrin into 12 parts of water, then slowly add 8 parts of 10% sodium hydroxide aqueous solution to it until the system is transparent to obtain solution I ; 15 parts of p-toluenesulfonyl chloride and 18 parts of acetonitrile are added to the reactor, and solution I is added dropwise therein, and the addition is completed in 1 hour, and the reaction is continued for 5 hours at room temperature, the reaction is terminated and suction filtered, and the filtrate is placed in the refrigerator Overnight, a large amount of white precipitate was precipitated, and the white solid was o...

Embodiment 3

[0032] A cyclodextrin-based photocatalyst composite hydrogel is a composite hydrogel with a three-dimensional network structure, containing a large amount of chelated heavy metal ion amino, carboxylate and nano-titanium dioxide with photocatalyst effect, and its preparation method is as follows:

[0033]a. Preparation of polyamino-modified cyclodextrin containing double bonds: disperse 7 parts of β-cyclodextrin into 13 parts of water, then slowly add 7 parts of 14% sodium hydroxide aqueous solution to it until the system is transparent to obtain solution I 9 parts of p-toluenesulfonyl chloride and 20 parts of acetonitrile are added to the reactor, and solution I is added dropwise therein, and the 0.6h dropwise addition is completed, and the reaction is continued for 4.5h at room temperature, and the reaction is completed and suction filtered, and the filtrate is placed in Overnight in the refrigerator, a large amount of white precipitate precipitated, and the white solid was ob...

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Abstract

The invention relates to a method for preparing multi-amino modified cyclodextrin, wherein the method comprises the steps for preparing multi-amino modified cyclodextrin in parts by mass: (1) dispersing cyclodextrin into water, and slowly adding 10%-15% strong alkali aqueous solution into the water until the system is transparent to obtain a solution I; (2) adding p-toluenesulfonyl chloride and acetonitrile into a reactor; dropwise adding the solution I; continuously carrying out a reaction for 3-5 h at room temperature after finishing dropwise adding for 0.5-1 h, ending the reaction, carryingout suction filtration, putting the filtrate into a refrigerator overnight, separating out a large number of white precipitates, carrying out suction filtration to obtain a white solid, dissolving the white solid with water, carrying out suction filtration, refrigerating the filtrate to separate out a large number of white precipitates, filtering, and carrying out vacuum drying to obtain poly-6-p-toluenesulfonyl cyclodextrin; and (3) dissolving the poly-6-p-toluenesulfonyl cyclodextrin and polyamine into a dipole solvent, carrying out a reaction at the temperature of 50-80 DEG C for 4-6 h, adding glycidyl methacrylate, continuing to carry out a reaction for 2-4 h, cooling to room temperature, adding methanol, adding acetone, precipitating, carrying out suction filtration to obtain a whitesolid, and repeating methanol dissolution and acetone precipitation to obtain the double-bond-containing multi-amino modified cyclodextrin.

Description

[0001] This invention is a divisional application of the Chinese patent "a cyclodextrin-based photocatalyst composite hydrogel and its preparation method". The application date is November 27, 2017, and the application number is 201711208765.4. technical field [0002] The invention relates to a cyclodextrin, in particular to a polyamino modified cyclodextrin and its application, and belongs to the technical field of chemical industry. [0003] technical background [0004] my country is a country with a shortage of water resources. The per capita water resources are only 1 / 4 of the world's, and the distribution of water resources is seriously uneven. How to alleviate the shortage of water resources and pollution has become an urgent problem. Heavy metal ion pollution can cause harm to the water environment and the entire ecosystem through water accumulation, and can endanger human health through direct contact or through the food chain. How to quickly and efficiently remove ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08B37/16C08J3/075C08J3/24C08L51/02C08K3/36C08K3/16C08K3/38C08F251/00C08F220/06C08F222/02B01J20/24B01J20/30B01J20/28C02F1/28C02F101/20C02F101/22
CPCB01J20/06B01J20/24B01J20/28047C02F1/286C02F2101/20C02F2101/22C08B37/0012C08F251/00C08J3/075C08J3/24C08J2351/02C08K3/36C08K3/38C08K2003/162C08F220/06C08F222/02
Inventor 万章文
Owner HUNAN CHENLI NEW MATERIAL CO LTD
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