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Radiation preparation method and application of polymer hydrogel-based nano iron oxide

A nano-iron oxide and hydrogel-based technology, which is applied in chemical instruments and methods, other chemical processes, water/sewage treatment, etc., can solve the problems of decreased purity and function of polymer materials, and can increase the adsorption effect and facilitate The effect of simple operation and preparation method

Inactive Publication Date: 2012-09-05
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the chemical polymerization methods need to add initiators during the preparation process, which leads to a decrease in the purity and function of the prepared polymer materials.

Method used

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  • Radiation preparation method and application of polymer hydrogel-based nano iron oxide
  • Radiation preparation method and application of polymer hydrogel-based nano iron oxide
  • Radiation preparation method and application of polymer hydrogel-based nano iron oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1. Take a certain volume of hydroxyethyl acrylate monomer (referred to as HEA) as component A, weigh a certain mass of N-vinylimidazole (referred to as NVI) and dissolve it in deionized water, fully dissolve and mix it uniformly as component B, and Component B is added to component A and mixed well; distilled water is used as component C and mixed according to (A+B):C ratio of 3:7 (v / v), where A:B ratio is 5:2 (mol / mol). The mixture was treated with ultrasound to homogenize the mixture.

[0029] 2. After nitrogen filling, at a temperature of -78°C, the radiation dose range is controlled within 1×10 4 ~1×10 8 Gy, using high-energy rays ( 60 Co-γ-ray) irradiation polymerization to form polymer hydrogels.

[0030] 3. Cut the polymer hydrogel formed after irradiation into small pieces of 1cm×1cm×1cm, put them in the Erlenmeyer flask for multiple times of washing, and then dry them at 40°C.

[0031] 4. Weigh an appropriate amount of polymer hydrogel to be modified and ...

Embodiment 2

[0036] 1. Take a certain volume of hydroxyethyl acrylate monomer (referred to as HEA) as component A, weigh a certain mass of N-vinylimidazole (referred to as NVI) and dissolve it in deionized water, fully dissolve and mix it uniformly as component B, and Component B is added to component A and mixed well; distilled water is used as component C and mixed according to (A+B):C ratio of 2:5 (v / v), where A:B ratio is 5:2 (mol / mol). The mixture was treated with ultrasound to homogenize the mixture.

[0037] 2. After nitrogen filling, at a temperature of -78°C, the radiation dose range is controlled within 1×10 4 ~1×10 8 Gy, using high-energy rays ( 137 Cs-γ-ray) irradiation polymerization to form polymer hydrogels.

[0038] 3. Cut the irradiated polymer hydrogel into small pieces of 1cm×1cm×1cm, put them in the Erlenmeyer flask for multiple times of washing, and then dry them at 40°C.

[0039] 4. Weigh 10g of the polymer hydrogel to be modified and put it into a three-necked ...

Embodiment 3

[0044] 1. Take a certain volume of hydroxyethyl acrylate monomer (referred to as HEA) as component A, weigh a certain mass of N-vinylimidazole (referred to as NVI) and dissolve it in deionized water, fully dissolve and mix it uniformly as component B, and Component B is added to component A and mixed well; distilled water is used as component C and mixed according to (A+B):C ratio of 3:7 (v / v), where A:B ratio is 5:2 (mol / mol). The mixture was treated with ultrasound to homogenize the mixture.

[0045] 2. After nitrogen filling, at a temperature of -95°C, the radiation dose range is controlled within 1×10 4 ~1×10 8 Gy, using high-energy rays ( 60 Co-γ-ray) irradiation polymerization to form polymer hydrogels.

[0046] 3. Cut the irradiated polymer hydrogel into small pieces of 1cm×1cm×1cm, put them in the Erlenmeyer flask for multiple times of washing, and then dry them at 40°C.

[0047] 4. Weigh 10g of the polymer hydrogel to be modified and put it into a three-neck bot...

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Abstract

The invention relates to a polymer hydrogel-based nano iron oxide which comprises polymer hydrogel formed by hydroxyethyl acrylate and N-vinyl imidazole in a polymerization form, and nano iron oxide is loaded on the polymer hydrogel, wherein the molar ratio between the hydroxyethyl acrylate and the N-vinyl imidazole is (1-9):1. A preparation method of the polymer hydrogel comprises the following steps of: (1) evenly mixing the hydroxyethyl acrylate, the N-vinyl imidazole and distilled water in a certain proportion, wherein the volume ratio of the mixture of the hydroxyethyl acrylate and the N-vinyl imidazole to the water is (1-2):5, and the molar ratio of the hydroxyethyl acrylate to the N-vinyl imidazole is (1-9):1; (2) after mixing, carrying out ultrasonic treatment for 7-13 minutes; (3) filling inert gas into the mixture obtained in the step (1) for guaranteeing an anaerobic state; and (4) adopting high-energy ray with the radiation dosage of 1*10<4>-1*10<8>Gy to irradiate the polymer hydrogel formed by polymerization within the temperature range of minus 63 DEG C to minus 95 DEG C.

Description

technical field [0001] The invention belongs to the technical field of environmental materials, and relates to the preparation of polymer hydrogel-based nanometer iron oxide and its application to deep purification treatment of heavy metal wastewater. Background technique [0002] In recent years, with the development of industry and the improvement of human living standards, the discharge of sewage has increased year by year, which contains a large number of heavy metal ions that are seriously harmful to the human body. It not only poses a threat to aquatic organisms, but also can accumulate to relatively High toxicity will eventually endanger human health. For example, in Japan in the 1960s and 1970s, Minamata disease caused by mercury pollution and bone pain caused by cadmium pollution occurred. In recent years, blood lead poisoning incidents have also occurred frequently in China, such as Binhai County and Shuyang County , Taizhou, Zhejiang and other places have success...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C08F220/28C08F226/06C08F2/46C02F1/28C02F1/62
Inventor 李正魁华蓉刘丹丹叶忠香
Owner NANJING UNIV
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