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Preparation method of micro-hydrogel having high selective detection activity to heavy metal lead

A high-selectivity, heavy metal technology, applied in the direction of measuring devices, instruments, analytical materials, etc., can solve the problems of unfavorable industrial production scientific research, complicated preparation and detection methods, and unobvious detection selectivity, so as to increase the characteristics of polyionic liquids , high selective detection performance, simple and controllable process effect

Active Publication Date: 2018-12-07
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in these systems, there are generally problems such as relatively expensive raw materials, relatively complicated preparation and detection methods, or unobvious detection selectivity, which is not conducive to industrial production and further scientific research.

Method used

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  • Preparation method of micro-hydrogel having high selective detection activity to heavy metal lead
  • Preparation method of micro-hydrogel having high selective detection activity to heavy metal lead
  • Preparation method of micro-hydrogel having high selective detection activity to heavy metal lead

Examples

Experimental program
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Effect test

Embodiment 1

[0042] 0.021g functional monomer 5,10,15,20-(4-pyridyl)porphyrin (TPyP) and 0.086g dihaloalkane 1,5-dibromopentane dissolved in organic solvent N,N-dimethylformamide (DMF) solution, stirred to fully dissolve, reacted at 70° C. for 12 hours, and cooled to room temperature after the reaction.

[0043]0.23g temperature-sensitive monomer N-isopropylacrylamide (NIPAm) and 0.047g tertiary ammonium group-containing monomer N-vinylimidazole (VIM) were dissolved in deionized water, stirred under nitrogen atmosphere to make it fully Dissolve, then add 0.034g of initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, under nitrogen atmosphere, react at constant temperature in 70°C oil bath for 20 minutes, then add the previously prepared N, N-dimethylformamide solution (reaction product containing 5,10,15,20-(4 pyridyl) porphyrin and dihaloalkane), continued to react for 6 hours, followed by N, N-dimethyl After formamide and deionized water dialysis and purification for one wee...

Embodiment 2

[0047] 0.021g functional monomer 5,10,15,20-(4-pyridyl)porphyrin (TPyP) and 0.086g dihaloalkane 1,4-dibromobutane dissolved in organic solvent N,N-dimethylformamide (DMF) solution, stirred to fully dissolve, reacted at 130° C. for 72 hours, and cooled to room temperature after the reaction.

[0048] 0.34g temperature-sensitive monomer N-isopropylacrylamide (NIPAm) and 0.0021g tertiary ammonium group-containing monomer 4-vinylpyridine (4-VP) were dissolved in deionized water and stirred under nitrogen atmosphere It is fully dissolved, and then add 0.034g initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, and react at a constant temperature of 60°C in an oil bath for 20 minutes under nitrogen atmosphere, before adding Prepared N,N-dimethylformamide solution (reaction product containing 5,10,15,20-(4 pyridyl)porphyrin and dihaloalkane), continued to react for 6 hours, followed by N,N-di After methylformamide and deionized water dialysis and purification for one wee...

Embodiment 3

[0051] 0.005g functional monomer 5,10,15,20-(4-pyridyl)porphyrin (TPyP) and 0.012g dihaloalkane 1,3-dibromopropane were dissolved in organic solvent N,N-dimethylformamide ( DMF) solution, stirred to fully dissolve, reacted at 100°C for 24 hours, and cooled to room temperature after the reaction.

[0052] 0.23g temperature-sensitive monomer N-isopropylacrylamide (NIPAm) and 0.05g tertiary ammonium group-containing monomer N-vinylimidazole (VIM) were dissolved in deionized water, stirred under nitrogen atmosphere to make it fully Dissolve, then add 0.012g of initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, under nitrogen atmosphere, react at constant temperature in an oil bath at 80°C for 20 minutes, then add the previously prepared N, N-dimethylformamide solution (reaction product containing 5,10,15,20-(4 pyridyl) porphyrin and dihaloalkane), continued to react for 6 hours, followed by N, N-dimethyl After formamide and deionized water dialysis and purification ...

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Abstract

The invention relates to the field of an environmentally sensitive polymer material and provides a preparation method of micro-hydrogel having high selective detection activity to heavy metal lead. The preparation method comprises: dissolving M1 and M2 in N, N-dimethylformamide, performing a quaternization reaction process at 70 to 130 DEG C, adding the reaction product into an aqueous solution containing M3 and M4, carrying out a reaction process in a nitrogen atmosphere, adding an initiator into the reaction system, carrying out a radical copolymerization reaction process, and then dialyzingthe product for one week to obtain purified ion micro-hydrogel. M1 represents 5, 10, 15, 20-4 pyridylporphyrin, M2 represents a polyhalogenated alkane compound, M3 represents an N-alkylacrylamide monomer and M4 represents a double bond compound containing a tertiary amine group. The micro-hydrogel can be stably stored at the room temperature for half a year or more and has high selective detection activity. The preparation method utilizes easily available raw materials, is easy to operate, is free of an emulsifier, has a convenient purification process, has simple and controllable processes and is suitable for industrial production.

Description

technical field [0001] The invention relates to the field of environment-sensitive polymer materials, in particular to a method for preparing a microhydrogel with high selective detection activity for heavy metal ion lead. Background technique [0002] In recent years, the industry has developed rapidly, followed by more and more serious environmental pollution problems, including air pollution, light pollution, water pollution and so on. Among them, water pollution caused by improper use and discharge of heavy metal ions seriously threatens human health and the ecological environment. This pollution mainly comes from batteries, agricultural wastewater, non-ferrous metal smelting industry, and motor vehicle emissions. Studies have found that when the content of metal ions in the human body exceeds or accumulates to a certain value, it will have adverse effects on metabolism, intellectual development, and other biological functions. [0003] In the fields of detection and re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F226/06C08F8/30G01N33/00
CPCC08F8/30C08F220/54C08F2800/20C08F2810/50G01N33/00C08F226/06
Inventor 杜滨阳文斌聂晶晶徐君庭
Owner ZHEJIANG UNIV
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