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A method for preparing cobalt (ii) ion-imprinted composite membranes with n-methylpyrrolidinyl acrylamide

A technology of methylpyrrolidinyl acrylamide and ion imprinting, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of template ion embedding too deep, uneven polymer grinding, large particles, etc., to achieve Solve the problems of complicated post-processing, good imprinting effect and large adsorption capacity

Active Publication Date: 2021-12-31
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, 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-methylpyrrolidinyl acrylamide, specifically comprising the following steps:

[0021] Step (1): Dissolve 0.1 mmol of cobalt(II) ions completely in 10 mL of porogenic solvent (methanol / water, v / v=1:2), and add 0.4 mmol of functional monomer N-methylpyrrolidinyl acrylamide Shake for 2 hours, add 1 mmol of crosslinking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shake well, and ultrasonicate for 5 minutes to form a pre-polymerization solution; in which cobalt (II) ions, functional monomer N-formaldehyde The molar ratio of pyrrolidinyl acrylamide to crosslinking agent ethylene glycol dimethacrylate is 1:4:10, and the molar ratio of cobalt (II) ion to initiator azobisisobutyronitrile is 1:0.06.

[0022] Step (2): Put the polytetrafluoroethylene microporous filter membrane in the pre-polymerization solution obtained in step (1), soak at room temperature for 3 minutes, an...

Embodiment 2

[0026] A method for preparing a cobalt (II) ion imprinted composite membrane with N-methylpyrrolidinyl acrylamide, specifically comprising the following steps:

[0027] Step (1): Dissolve 0.1mmol cobalt(II) ions completely in 10mL porogenic solvent (ethanol / water, v / v=1:1), add 0.4mmol functional monomer N-methylpyrrolidinyl acrylamide Shake for 3 hours, add 3mmol cross-linking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shake well, and ultrasonicate for 10 minutes to form a pre-polymerization solution; in which cobalt (II) ions, functional mono-N-methyl The molar ratio of pyrrolidinyl acrylamide to crosslinker ethylene glycol dimethacrylate is 1:4:30, and the molar ratio of cobalt (II) ions to initiator azobisisobutyronitrile is 1:0.12.

[0028] Step (2): Put the polyvinylidene fluoride microporous filter membrane in the pre-polymerization solution obtained in step (1), soak at room temperature for 15 minutes, and finally react at 60°C for 12 ho...

Embodiment 3

[0032] A method for preparing a cobalt (II) ion imprinted composite membrane with N-methylpyrrolidinyl acrylamide, specifically comprising the following steps:

[0033] Step (1): Dissolve 0.1 mmol of cobalt(II) ions completely in 10 mL of porogenic solvent (N,N-dimethylformamide / water, v / v=1:1), add 0.4 mmol of functional monomer N - Methylpyrrolidinyl acrylamide was shaken for 2.5 hours, adding 5 mmol of cross-linking agent ethylene glycol dimethacrylate and initiator azobisisobutyronitrile, shaking well, and ultrasonicating for 7 minutes to form a pre-polymerization solution; wherein cobalt (II ) ion, functional monomer N-methylpyrrolidinyl acrylamide and cross-linking agent ethylene glycol dimethacrylate in a molar ratio of 1:4:50, cobalt (II) ion and initiator azobisisobutyronitrile The molar ratio is 1:0.09.

[0034] Step (2): Place the Nylon-6 microporous membrane in the pre-polymerization solution obtained in step (1), soak at room temperature for 30 minutes, and final...

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Abstract

The invention relates to a method for preparing a cobalt (II) ion imprinted composite membrane by using N-methylpyrrolidinyl acrylamide, which belongs to the technical field of membrane material preparation. The method of the present invention uses Co(II) as a template ion, N-methylpyrrolidinyl acrylamide as a functional monomer, ethylene glycol dimethacrylate as a crosslinking agent, and azobisisobutyronitrile as an initiator , through the combination of metal ion imprinting technology and membrane technology, cobalt(II) ion imprinting composite membrane Co(II)‑MICM was prepared. The cobalt (II) ion imprinted composite membrane prepared by the invention has high stability, and has better specific adsorption capacity and imprinting effect on the cobalt (II) ion.

Description

technical field [0001] The invention relates to a method for preparing a cobalt (II) ion imprinted composite membrane by using N-methylpyrrolidinyl acrylamide, which belongs to the technical field of membrane material preparation. Background technique [0002] With the development of industrial production technology, the problem of water pollution is becoming more and more serious. The discharge of wastewater containing cobalt ions is one of the important sources of water pollution. Commonly used methods for removing cobalt ions include electrochemical methods, chemical precipitation methods, adsorption methods, and membrane separation methods. These methods have been widely used in the research on the treatment of cobalt ion-containing wastewater, but these treatment methods have some shortcomings, such as complex process, high cost, poor selectivity or easy to cause secondary pollution. Therefore, it is necessary to find a separation and enrichment method with high selec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/40B01D69/02B01D69/12B01J20/26B01J20/28B01J20/30
CPCB01D69/02B01D69/125B01D71/40B01J20/268B01J20/28033B01D2323/24B01D2325/12
Inventor 成会玲胡德琼刘迎梅赵莉陈树梁谢嘉轩字富庭胡显智
Owner KUNMING UNIV OF SCI & TECH
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