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Preparation and application of a microwave-assisted inverse emulsion heavy metal ion imprinting material

A technology of heavy metal ions and imprinted materials, applied in water/sludge/sewage treatment, water pollutants, adsorption of water/sewage treatment, etc., to achieve strong specific adsorption capacity, shorten polymerization time, and large specific surface area

Active Publication Date: 2017-12-19
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of ion-imprinted materials by the microwave-assisted method has not been reported yet.

Method used

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  • Preparation and application of a microwave-assisted inverse emulsion heavy metal ion imprinting material
  • Preparation and application of a microwave-assisted inverse emulsion heavy metal ion imprinting material
  • Preparation and application of a microwave-assisted inverse emulsion heavy metal ion imprinting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Dissolve 5mmol α-cyclodextrin and 50mmol acrylamide in double distilled water, add 12mmol cadmium chloride aqueous solution, stir in water bath at 80°C for 10min;

[0027] Add 1g of Span80 and 1g of Tween80, then add 30g of liquid paraffin, and stir at high speed for 60min to form an inverse pre-emulsion;

[0028] Add 3wt% epichlorohydrin in the total mass of the oil phase and the water phase and 0.02wt% potassium persulfate in the total mass of the oil phase and the water phase, and put them in a microwave reactor at 240W for 20 minutes;

[0029] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0030] Add a mixed solution of methanol: acetic acid (1:1), shake at 20°C for 8 hours, and vacuum filter to obtain the precipitate;

[0031] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 7;

[0032] The washed polymer was placed in a vacuum drying oven, and dried at 30° C. for 4...

Embodiment 2

[0034] Dissolve 3mmol β-cyclodextrin in double distilled water, add 6mmol cadmium nitrate aqueous solution, add 40mmol methacrylamide aqueous solution, stir in water bath at 30°C for 40min;

[0035] Add 4.8g of Span60 and 1.2g of Tween20, then add 33.5g of kerosene, and stir at high speed for 30min to form an inverse pre-emulsion;

[0036] Add ethylene glycol dimethacrylic acid of 5 wt% of the total mass of the oil phase and the water phase and azobisisobutyronitrile of 0.1 wt% of the total mass of the oil phase and the water phase, put it into a microwave reactor and react at 400W for 1 min;

[0037] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0038] Add a mixed solution of methanol: acetic acid (3:1), shake at 30°C for 7 hours, and vacuum filter to obtain the precipitate;

[0039] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 6;

[0040] The washed polymer was placed in...

Embodiment 3

[0042] Dissolve 4mmol γ-cyclodextrin in double distilled water, then add 30mmol N,N-dipropyl-2-methacrylamide and 10mmol cadmium sulfate aqueous solution, and stir at 60°C for 20min;

[0043] Add 5g of Span40 and 1g of Tween40, then add 36.4g of white oil, and stir at high speed for 40min to form an inverse pre-emulsion;

[0044]Add 7wt% N,N-methylenebisacrylamide of the total mass of the oil phase and the water phase and 0.3wt% dimethyl azobisisobutyrate of the total mass of the oil phase and the water phase, put them in a microwave reactor Reaction under 20W for 80min;

[0045] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0046] Add a mixed solution of methanol: acetic acid (5:1), shake at 50°C for 5 hours, and vacuum filter to obtain the precipitate;

[0047] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 7;

[0048] The washed polymer was placed in a vacuum drying oven...

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Abstract

The invention relates to the field of environmental function adsorbents, in particular to a method for preparing a heavy metal ion imprinting material with a microwave-assisted inverse emulsion polymerization method and an application of the heavy metal ion imprinting material. The method includes the steps that heavy metal ions serve as imprinting ions, cyclodextrin matter and acrylamide matter are used as functional monometers, the functional monometers are polymerized in a microwave-assisted mode with the inverse emulsion method, and the imprinting material with the small and even particle size is prepared. The method for preparing the heavy metal ion imprinting material is easy to operate, and the imprinting material has the advantages of being small in particle size, large in specific surface area, high in specific adsorption capacity and the like.

Description

technical field [0001] The invention relates to the field of environmental functional adsorbents, in particular to the preparation and application of a microwave-assisted inverse emulsion heavy metal ion imprinting material. Background technique [0002] As we all know, excessive heavy metal cadmium in the environment will cause serious harm to animals, plants and human body. Ion imprinted material is a new type of adsorbent with specific adsorption capacity for target heavy metals. It has the advantages of molecularly imprinted materials and has a wide range of applications in the separation and recovery of heavy metals. The particle size of the polymer prepared by the traditional method is relatively large, but the emulsion polymerization method can control the size of the prepared microspheres, and the particle size of the obtained polymer is relatively uniform. In the process of synthesizing polymers, the traditional water bath heating method is generally used, and the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/20
CPCB01J20/268C02F1/285C02F2101/20
Inventor 祝方李璐玮邢俊德
Owner TAIYUAN UNIV OF TECH
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