Photo-catalytic composite hydrogel based on cyclodextrin and preparation method thereof

A composite hydrogel and cyclodextrin technology, which is applied in chemical instruments and methods, water pollutants, alkali metal compounds, etc., can solve problems such as structural damage, poor comprehensive performance of hydrogel water treatment, and decreased adsorption capacity. To achieve the effect of capturing sensitive

Inactive Publication Date: 2018-04-13
HUNAN CHENLI NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the hydrogel produced by this method has poor comprehensive performance in water treatment, and is easily polluted by microorganisms, etc., resulting in structural damage and decreased adsorption capacity.

Method used

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  • Photo-catalytic composite hydrogel based on cyclodextrin and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 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 groups, carboxylate groups and nano-titanium dioxide with photocatalyst action, and its preparation method is as follows:

[0023] 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 are added to the reactor, and solution I is added dropwise therein, after 0.5h dropwise addition, the reaction is continued for 4h 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 separated out, and the white solid...

Embodiment 2

[0026] 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 groups, carboxylate groups and nano-titanium dioxide with photocatalyst action, and its preparation method is as follows:

[0027] 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 whi...

Embodiment 3

[0030] 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 groups, carboxylate groups and nano-titanium dioxide with photocatalyst action, and its preparation method is as follows:

[0031]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 whit...

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Abstract

The invention relates to photo-catalytic composite hydrogel based on cyclodextrin and a preparation method thereof. The cyclodextrin, nanometer titanium dioxide and acrylamide copolymer composite hydrogel synthesized by adopting an instant gel method has a three-dimensional net structure containing an amino group with a large number of chelate heavy metal ions, a carboxylate radical and nanometertitanium dioxide with photocatalysis. The photo-catalytic composite hydrogel based on the cyclodextrin, provided by the invention, can adsorb metal ions in water, is high in adsorption efficiency andhas wide application prospect in the fields of ion adsorption and industrial wastewater treatment.

Description

technical field [0001] The invention relates to a hydrogel film, in particular to a cyclodextrin-based photocatalyst composite hydrogel and a preparation method thereof, belonging to the technical field of water treatment. technical background [0002] 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, etc., and can endanger human health through direct contact or through the food chain. How to quickly and efficiently remove heavy metal ions in water has become a major topic in the field of water pollution control research. [0003] Chinese patent CN201410123913.2 relates to a hydrogel for sewage treatment and its preparation method, the h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/075C08J3/24C08L51/02C08K3/36C08K3/16C08K3/38C08F251/00C08F220/06C08F222/02C08B37/16B01J20/24B01J20/30B01J20/28C02F1/28C02F101/20C02F101/22
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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