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A preparation method of magnetic hydrogel with high adsorption capacity for 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: 2018-11-06
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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] The preparation method of the high-absorption 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 carboxymethyl cellulose, sodium hydroxide, and deionized water until dissolved; 2. Add α-cyclodextrin and sodium carboxymethyl cellulose to the product of step one in sequence 1.5%-8.5% of the total mass of magnetic ferroferric oxide particles, 3-7 times the volume of the deionized water in step 1, liquid paraffin, and 1.2-2.8 of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose The emulsifier is transferred to the reactor after stirring evenly, and the reaction temperature is 30-65℃; 3. Add sodium hydroxide solution 0.5-1 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose In the reactor, while stirring, 6-10 times of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose ...

Embodiment 2

[0013] Mix α-cyclodextrin, sodium carboxymethyl cellulose, sodium hydroxide, and deionized water and place them in a beaker to dissolve, the mass ratio of the α-cyclodextrin and sodium carboxymethyl cellulose is 1.5:1, The mass ratio of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose to sodium hydroxide is 2:1, and the emulsifier and 4 are added to account for 1.6 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose. Liquid paraffin with twice the volume of deionized water is emulsified in a closed homogenizer for 30 minutes. During the emulsification process, 1.5% of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose is added to the ferroferric oxide particles. The emulsion was transferred to a three-necked bottle and mechanically stirred in a water bath at 40°C. Sodium hydroxide solution which accounted for 0.9 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose was added; the α-cyclodextrin and ca...

Embodiment 3

[0015] Mix α-cyclodextrin, sodium carboxymethyl cellulose, sodium hydroxide, and deionized water and place them in a beaker until dissolved, and the mass ratio of α-cyclodextrin and sodium carboxymethyl cellulose is 1.8:1, The ratio of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose to the mass of sodium hydroxide is 2:1, and an emulsifier and 5.5 that account for 2.4 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose are added. Liquid paraffin with twice the volume of deionized water is emulsified in a closed homogenizer for 40 minutes. During the emulsification process, 2.5% of the total mass of α-cyclodextrin and sodium carboxymethyl cellulose is added to the ferroferric oxide particles. The emulsion was transferred to a three-necked bottle and mechanically stirred in a water bath at 50°C. Sodium hydroxide solution which accounted for 0.8 times the total mass of α-cyclodextrin and sodium carboxymethyl cellulose was added; it would ac...

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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 method for preparing a magnetic hydrogel with high adsorption to copper ions. Background technique [0002] Magnetic hydrogel is a type of polymer material that can expand or contract in volume under the action of an external magnetic field. Because magnetic hydrogels are hydrophilic and water-insoluble polymer materials with a three-dimensional network structure, their unique water absorption and good biocompatibility have attracted the attention of materials science and biomedical workers. It is widely used in tissue engineering scaffolds, bioengineering cell separation, environmental engineering sewage treatment and drug carriers, and has good application prospects. 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. Magnetic hydrogel is a new type of adsorption materi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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