Multi-amino modified cyclodextrin and application thereof

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 ...

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