Preparation method for micro hydrogel capable of detecting various heavy metal ions in water

A heavy metal ion, micro water technology, applied in the measurement of color/spectral characteristics, material analysis by observing the effect on chemical indicators, and analysis by chemical reaction of materials, etc., can solve the problem of raw material streptavidin, Biotin and deoxynucleotides are expensive, temperature-sensitive microhydrogels have no reports of heavy metal ions, and they are not suitable for large-scale industrial production, so as to expand the application field and improve solubility and stability.

Active Publication Date: 2015-07-22
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the raw materials streptavidin, biotin and deoxynucleotide etc. required by this invention are relatively expensive and are not suitable for large-scale industrial production.
[0007] So far, there are many reports on the detection of heavy metal ions in water at home and abroad, but there are basically no reports on the detection and enrichment of heavy metal ions using temperature-sensitive micro-hydrogels as carriers.

Method used

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  • Preparation method for micro hydrogel capable of detecting various heavy metal ions in water
  • Preparation method for micro hydrogel capable of detecting various heavy metal ions in water
  • Preparation method for micro hydrogel capable of detecting various heavy metal ions in water

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 0.23g temperature-sensitive monomer N-isopropylacrylamide (NIPAm), 0.028g tertiary ammonium group-containing monomer N-vinylimidazole (VIM) and 0.049g dihaloalkane 1,2-dibromoethane dissolved In deionized water, stir under nitrogen atmosphere to fully dissolve, then add 0.025g initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, under nitrogen atmosphere, at 60 After 20 minutes of constant temperature reaction in an oil bath at ℃, N,N-dimethylformamide solution containing 0.043g 4-(2-pyridylazo)resorcinol was added, and the reaction was continued for 6 hours. After dialysis and purification for one week, the A microhydrogel capable of detecting various heavy metal ions was obtained.

[0046] In this embodiment, the quality of the initiator is 7.14% of the total weight of the four reactants M1, M2, M3, and M4; : M1 is 65.71%, M2 is 8%, M3 is 14%, M4 is 12.29%.

Embodiment 2

[0048] 0.23g temperature-sensitive monomer N-isopropylacrylamide (NIPAm), 0.028g tertiary ammonium group-containing monomer N-vinylimidazole (VIM) and 0.049g dihaloalkane 1,6-dibromohexane dissolved In deionized water, stir under nitrogen atmosphere to fully dissolve, then add 0.025g initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, under nitrogen atmosphere, at 70 After 20 minutes of constant temperature reaction in an oil bath at ℃, N,N-dimethylformamide solution containing 0.043g 4-(2-pyridylazo)resorcinol was added, and the reaction was continued for 6 hours. After dialysis and purification for one week, the A microhydrogel that can detect various heavy metal ions is obtained; the transmission electron micrograph and temperature sensitivity of the microhydrogel obtained by the copolymerization reaction are as follows: figure 1 , 2 shown.

[0049] In this embodiment, the quality of the initiator is 7.14% of the total weight of the four reactants M1, M2, M3,...

Embodiment 3

[0051] 0.23g temperature-sensitive monomer N-isopropylacrylamide (NIPAm), 0.028g tertiary ammonium group-containing monomer N-vinylimidazole (VIM) and 0.049g dihaloalkane 1,6-dibromohexane dissolved In deionized water, stir under nitrogen atmosphere to fully dissolve, then add 0.025g initiator 2,2'-azobisisobutylamidine dihydrochloride, stir well, under nitrogen atmosphere, at 80 After 20 minutes of constant temperature reaction in an oil bath at ℃, N,N-dimethylformamide solution containing 0.043g 4-(2-pyridylazo)resorcinol was added, and the reaction was continued for 24 hours. After one week of dialysis and purification, the A microhydrogel capable of detecting various heavy metal ions was obtained.

[0052] In this embodiment, the quality of the initiator is 7.14% of the total weight of the four reactants M1, M2, M3, and M4; : M1 is 65.71%, M2 is 8%, M3 is 14%, M4 is 12.29%.

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Abstract

The invention relates to the field of environmentally sensitive high polymer materials, in particular to a preparation method for a micro hydrogel capable of detecting various heavy metal ions in water. The preparation method for the micro hydrogel comprises the following steps: dissolving M1, M2, M3 and an initiator in water, performing the free radical copolymerization reaction under an oxygen free condition at 60-90 DEG C, adding an N,N-dimethyl formamide solution of M4 after 20 minutes of the copolymerization reaction, and continuously reacting for 6-24 hours; after the completion of the copolymerization reaction, dialyzing the obtained finished product for a week to obtain the purified ion micro hydrogel. Through the adoption of the micro hydrogel provided by the invention, various metal ions such as copper, nickel, zinc, cobalt, iron, lead, manganese, aluminum, chromium and barium of which the concentrations are at the grade of micron can be effectively identified visually; the preparation method and the reaction operation are simple, an emulsifier is not needed, the purification process is convenient, the process is simple and controllable, and the preparation method is suitable for industrialized 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 capable of detecting various heavy metal ions. Background technique [0002] In recent years, sewage treatment has gradually become an important public health issue and has received extensive attention. Heavy metals are the most important pollutants in the water treatment process and usually exist in industrial and urban wastewater, among which industrial wastes become the main source of heavy metal pollution in natural waters. Heavy metal ions have been reported as key pollutants for their mobility and toxicity. When levels of copper, zinc, cadmium, lead, mercury, iron, nickel and other metals in the body exceed tolerated levels, they can have potentially damaging effects on the human body and other organisms. [0003] At present, there are many patents on the preparation methods of heavy metal ion detection material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/54C08F226/06C08F8/44G01N21/78G01N21/31G01N21/33
Inventor 杜滨阳周娴婧聂晶晶
Owner ZHEJIANG UNIV
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