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Preparation and application of an inverse emulsion heavy metal ion imprinting material

A technology of heavy metal ions and imprinted materials, applied in other chemical processes, water/sludge/sewage treatment, water pollutants, etc., can solve the problems of less ion imprinted materials, easy layering, and difficult stability of inverse emulsions, etc., to achieve Strong specific adsorption capacity, small particle size, and large specific surface area

Active Publication Date: 2017-11-07
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inverse emulsion is not easy to be stable and easy to separate during the formation process. At present, there are few research reports on the preparation of ion imprinted materials by using the inverse emulsion method.
However, the method for preparing ion-imprinted materials by inverse emulsion method and bifunctional monomer has not been reported yet.

Method used

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  • Preparation and application of an inverse emulsion heavy metal ion imprinting material
  • Preparation and application of an inverse emulsion heavy metal ion imprinting material
  • Preparation and application of an inverse emulsion heavy metal ion imprinting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Dissolve 2mmol hydroxypropyl-β-cyclodextrin in double distilled water, add 20mmol N,N-dimethylacrylamide and 2mmol cadmium chloride aqueous solution, stir in water bath at 10°C for 60min;

[0028] Add 8g of Span20 and 1g of Tween20, then add 39g of gasoline, stir rapidly for 50min to form a water-in-oil inverse pre-emulsion;

[0029] Add 9 wt% of divinylbenzene in the total mass of the oil phase and the water phase and 0.5 wt% of ammonium persulfate in the total mass of the oil phase and the water phase, and react for 3 hours.

[0030] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0031] Add a mixed solution of methanol: acetic acid (9:1), shake at 40°C for 6 hours, and vacuum filter to obtain the precipitate;

[0032] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 6;

[0033] The washed polymer was placed in a vacuum drying oven, and dried at 70° C. for 8 hours to ob...

Embodiment 2

[0035] 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;

[0036] Add 4.8g of Span60 and 1.2g of Tween20, then add 33.5g of kerosene, stir rapidly for 30min to form a water-in-oil inverse pre-emulsion;

[0037] 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, and react for 4 hours;

[0038] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0039] Add a mixed solution of methanol: acetic acid (9:1), shake at 30°C for 7 hours, and vacuum filter to obtain the precipitate;

[0040] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 7;

[0041] The washed polymer was placed in a vacuum drying oven, and dried at ...

Embodiment 3

[0043] 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;

[0044]Add 5g of Span40 and 1g of Tween40, then add 36.4g of white oil, stir rapidly for 40min to form a water-in-oil inverse pre-emulsion;

[0045] 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, and react for 5 hours;

[0046] The obtained emulsion is demulsified with ethanol and acetone to obtain polymer microspheres;

[0047] Add a mixed solution of methanol: acetic acid (9:1), shake at 50°C for 5 hours, and vacuum filter to obtain the precipitate;

[0048] The precipitate was repeatedly washed with double distilled water until the pH of the filtrate was 6;

[0049] The washed polymer was placed in a vacuum drying oven, and dried at 50° C. for 24 hours to ...

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Abstract

The invention relates to the field of environmental functional adsorbents, in particular to preparation of a heavy metal ion imprinted material adopting an inverse emulsion and an inverse emulsion polymerization method and an application of the heavy metal ion imprinted material. According to the preparation, heavy metal ions are taken as imprinting ions, a cyclodextrin substance and an acrylamide substance are taken as functional monomers, and the imprinted material with small and uniform particle size is prepared with an inverse emulsion method. A method for preparation of the heavy metal ion imprinted material adopting the inverse emulsion is simple to operate, and the imprinted material has the advantages of smaller particle size, large specific surface area, higher 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 an inverse emulsion heavy metal ion imprinting material using an inverse emulsion polymerization method. Background technique [0002] Heavy metal environmental pollution is becoming more and more serious, which has serious harm to human health and ecological environment. Heavy metals are easy to accumulate in the environment, difficult to degrade, and enter water, air, and soil to cause serious environmental pollution problems. Therefore, it is of great significance to find a method with good selectivity, low detection limit and reusable detection and treatment of heavy metal ions in wastewater. [0003] Ion imprinted materials are developed on the basis of molecular imprinted materials. Molecular imprinting technology is to form a monomer-template complex through the interaction between template molecules and appropriate fu...

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 祝方李璐玮路晏红
Owner TAIYUAN UNIV OF TECH
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