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Method for preparing cobalt (II) ion imprinting composite membrane with N-pyrrolidinyl acrylamide

A pyrrolidinyl acrylamide, ion imprinting technology, applied in chemical instruments and methods, alkali metal compounds, alkali metal oxides/hydroxides, etc., can solve the problem of uneven grinding of polymers, too deep embedding of template ions, Difficult to elute and other problems, to achieve the effect of good imprinting effect, excellent adsorption performance and large adsorption capacity

Active Publication Date: 2019-04-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, all polymers have problems such as uneven grinding, large particles, deep embedding of template ions, difficulty in elution, and even leakage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a cobalt (II) ion imprinted composite membrane with N-pyrrolidinyl acrylamide, the specific steps are as follows:

[0021] (1) Completely dissolve 0.1mmol cobalt(II) ions in 10mL porogen (methanol / water, v / v=1:1), add 0.4mmol functional monomer N-pyrrolidinyl acrylamide and shake for 2h, add 1mmol crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shake well, ultrasonic 5min, form pre-polymerization solution; wherein cobalt (II) ion, functional monomer N-pyrrolidinyl acrylamide The molar ratio of the crosslinking agent ethylene glycol dimethacrylate is 1:4:10, and the molar ratio of cobalt (II) ions and the initiator azobisisobutyronitrile is 1:0.06.

[0022] (2) Put the polytetrafluoroethylene microporous filter membrane in the pre-polymerization solution obtained in step (1), soak at room temperature for 3 minutes, and finally react at 50°C for 12 hours to form a cobalt ion-imprinted composite membrane, that ...

Embodiment 2

[0026] A method for preparing a cobalt (II) ion imprinted composite membrane with N-pyrrolidinyl acrylamide, the specific steps are as follows:

[0027] (1) Completely dissolve 0.1mmol cobalt(II) ions in 10mL porogen (ethanol / water, v / v=1:1), add 0.4mmol functional monomer N-pyrrolidinyl acrylamide and shake for 3h, add 3mmol crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shake well, ultrasonic 10min, form pre-polymerization solution; wherein cobalt (II) ion, functional monomer N-pyrrolidinyl acrylamide The molar ratio of the crosslinking agent ethylene glycol dimethacrylate is 1:4:30, and the molar ratio of the cobalt (II) ion and the initiator azobisisobutyronitrile is 1:0.12.

[0028] (2) Put the polyvinylidene fluoride microporous filter membrane in the prepolymerization solution obtained in step (1), soak at room temperature for 30 minutes, and finally react at 70°C for 24 hours to form a cobalt ion imprinted composite membrane, na...

Embodiment 3

[0032] A method for preparing a cobalt (II) ion imprinted composite membrane with N-pyrrolidinyl acrylamide, the specific steps are as follows:

[0033] (1) Dissolve 0.1mmol cobalt(II) ion completely in 10mL porogen (N,N-dimethylformamide / water, v / v=1:1), add 0.4mmol functional monomer N-pyrrole Shake the alkylacrylamide for 2.5 hours, add 5mmol crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shake well, and ultrasonicate for 7 minutes to form a pre-polymerization solution; wherein cobalt (II) ions, functional The molar ratio of monomer N-pyrrolidinyl acrylamide and crosslinker ethylene glycol dimethacrylate is 1:4:50, and the molar ratio of cobalt (II) ion and initiator azobisisobutyronitrile is 1:0.09 .

[0034] (2) Put the Nylon-6 microporous membrane in the pre-polymerization solution obtained in step (1), soak at room temperature for 15 minutes, and finally react at 60°C for 18 hours to form a cobalt ion imprinted composite membran...

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Abstract

The invention discloses a method for preparing a cobalt (II) ion imprinting composite membrane with N-pyrrolidinyl acrylamide and belongs to the scientific and technical field of membrane materials. The method combines metal ion imprinting technology and membrane separating technology, saves complicated operations such as grinding and screening and achieves protection over specific recognition sites, thereby overcoming the shortcomings of complex processes and long elution time in existing cobalt ion imprinting polymer preparation. The method for preparing the cobalt (II) ion imprinting composite membrane with the N-pyrrolidinyl acrylamide is based on the principle that metal ions and compounds of heteroatoms such as N and O can produce relatively good chelation, takes the N-pyrrolidinyl acrylamide as the functional monomer, cobalt (II) as the template ion and a commercial membrane as the carrier to prepare the cobalt (II) ion imprinting composite membrane (Co (II)-MICM). The preparedcobalt (II) ion imprinting composite membrane has the advantages of being stable in performance, high in adsorbing capacity and the like.

Description

technical field [0001] The invention relates to a method for preparing a cobalt (II) ion imprinted composite membrane by using N-pyrrolidinyl acrylamide, which belongs to the technical field of membrane material science. Background technique [0002] Cobalt (Co) element is located in the fourth period and the main group VIII of the periodic table of chemical elements. Because of its unique physical and chemical properties, it is widely used in metal material smelting and processing, mining, military weapon manufacturing, electroplating and other industries. With the frequent production activities of human beings, a large amount of cobalt is discharged into water bodies and soils, resulting in extremely serious water pollution problems in rivers and lakes. The large amount of cobalt discharged has exceeded the self-purification ability of the natural environment. [0003] At present, the commonly used methods for treating cobalt ions in sewage include coagulation, adsorption,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C08F222/14C08F220/60C08J9/26C02F101/20
CPCC02F1/288C08F222/1006C08J9/26B01J20/261B01J20/28033C02F2101/20C08F222/102C08F220/60
Inventor 成会玲胡德琼刘迎梅字富庭陈树梁陈云龙胡显智
Owner KUNMING UNIV OF SCI & TECH
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