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Preparation method of magnetic hydrogel with high adsorbability on copper ions

A high adsorption and magnetic water technology, applied in the direction of adsorption water/sewage treatment, chemical instruments and methods, water pollutants, etc., can solve the problems of narrow environmental application range, low saturated adsorption capacity, poor selectivity, etc., and achieve good selection Excellent adsorption effect, large specific surface area, and easy operation

Active Publication Date: 2016-12-14
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a method for preparing a magnetic hydrogel with high adsorption to metal copper to solve the problems of narrow environmental application range, poor selectivity, low saturated adsorption capacity, high cost and problems existing in current heavy metal pollution treatment methods. Problems such as difficulty in degradation

Method used

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Experimental program
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Effect test

Embodiment 1

[0009] The preparation method of the high-adsorption magnetic hydrogel in this embodiment adopts the inverse suspension emulsion polymerization method, which is specifically carried out according to the following steps:

[0010] 1. Mix α-cyclodextrin, sodium carboxymethylcellulose, sodium hydroxide, and deionized water until dissolved; 2. Add α-cyclodextrin and sodium carboxymethylcellulose to the product of step 1 in sequence 1.5%-8.5% of the total mass of magnetic ferric oxide particles, liquid paraffin accounting for 3-7 times the volume of deionized water in step 1, and 1.2-2.8% of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose times the emulsifier, stirred evenly and then transferred to the reactor, the reaction temperature is 30-65°C; 3. Add sodium hydroxide solution 0.5-1 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose In the reactor, while stirring, add epichlorohydrin accounting for 6-10 times the total mass of α-cyclodex...

Embodiment 2

[0013] Mix α-cyclodextrin, sodium carboxymethylcellulose, sodium hydroxide, and deionized water in a beaker until dissolved, and the mass ratio of the α-cyclodextrin and sodium carboxymethylcellulose is 1.5:1, The mass ratio of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose to sodium hydroxide is 2:1, adding an emulsifier and 4 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose Liquid paraffin twice the volume of deionized water was emulsified for 30 minutes under a closed homogenizer, and iron ferric oxide particles accounting for 1.5% of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose were added during the emulsification process. The emulsion was transferred to a three-necked bottle and mechanically stirred in a 40°C water bath, and a sodium hydroxide solution accounting for 0.9 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose was added; the α-cyclodextrin and carboxymethyl cellulose Add...

Embodiment 3

[0015] Mix α-cyclodextrin, sodium carboxymethylcellulose, sodium hydroxide, and deionized water in a beaker until dissolved. The mass ratio of α-cyclodextrin and sodium carboxymethylcellulose is 1.8:1, The mass ratio of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose to sodium hydroxide is 2:1, adding an emulsifier accounting for 2.4 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose and 5.5 Liquid paraffin twice the volume of deionized water was emulsified for 40 minutes under a closed homogenizer, and ferric oxide microparticles accounting for 2.5% of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose were added during the emulsification process. The emulsion was transferred to a three-necked bottle and mechanically stirred in a water bath at 50°C, and a sodium hydroxide solution accounting for 0.8 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose was added; Epichlorohydrin 8 times the total ...

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Abstract

The invention relates to a preparation method of magnetic hydrogel with high adsorbability on copper ions. The preparation method comprises the following steps of: performing emulsification by taking a certain amount of emulsifiers, dispersing agents and raw materials as a system and adopting a reverse phase suspension emulsion polymerization method, wherein the raw materials comprise alpha-cyclodextrin, sodium carboxymethylcellulose and magnetic ferroferric oxide particles; transferring the system to a reactor after uniform emulsification, adding a certain amount of initiators and cross-linking agents and performing a polymerization reaction at a certain temperature; and then sequentially performing the steps of performing thermostatic reaction, removing the solvents, washing, dialyzing (7-10d) and the like to obtain the high-adsorbability magnetic hydrogel. According to the high-adsorbability magnetic hydrogel prepared by the method, the highest water-absorbing rate on distilled water can reach 8058 g / g and the highest saturated adsorbing capacity on the metal copper ions is 992 mg / g. The hydrogel has high selective adsorbability on metal ions and is suitable for removing and recycling the metal ions in the aspects of industrial waste water, agricultural chemistry and the like.

Description

technical field [0001] The invention relates to a preparation method of magnetic hydrogel with high adsorption capacity for copper ions. Background technique [0002] Magnetic hydrogels are a class of polymer materials that can expand or contract in volume under the action of an external magnetic field. Since magnetic hydrogel is a polymer material that is hydrophilic but insoluble in water and has a three-dimensional network structure, it has attracted the attention of material science and biomedical workers for its unique advantages such as water absorption and good biocompatibility. It is widely used in tissue engineering scaffolds, bioengineering cell separation, environmental engineering sewage treatment and drug carriers, and has a good application prospect. In recent years, due to the rapid development of industry, the use of heavy metals has increased exponentially, and the resulting heavy metal pollution has brought severe challenges to human survival and health. ...

Claims

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Application Information

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IPC IPC(8): C08J3/075C08J3/24C08L5/16C08L1/28C02F1/28B01J20/30
CPCB01J20/28009B01J20/28047C02F1/285C02F2101/20C08J3/075C08J3/246C08J2301/28C08J2305/16
Inventor 黄占华张璐刘学高鸣霞孔德功
Owner NORTHEAST FORESTRY UNIVERSITY
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