A kind of preparation method of copper ion imprinted nanofiber membrane

A technology of nanofiber membranes and copper ions, applied in fiber treatment, fiber types, chemical instruments and methods, etc., can solve the problems of poor stability of loaded liquid membranes, limited applications, and unsatisfactory link energy selectivity, etc., to achieve increased Effects of specific surface area and porosity, volume reduction, and ease of handling

Active Publication Date: 2021-08-31
武夷学院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the stability of the loaded liquid film is poor, and the link energy selectivity is not very ideal, which limits its application.

Method used

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  • A kind of preparation method of copper ion imprinted nanofiber membrane
  • A kind of preparation method of copper ion imprinted nanofiber membrane
  • A kind of preparation method of copper ion imprinted nanofiber membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] 1) Add 1.0 g of polystyrene into a mixed solvent of 20 g of N,N-dimethylformamide and 10 g of N-methylpyrrolidone, and magnetically stir for 6 hours at room temperature to fully dissolve it to obtain a solution. Pour the solution into a petri dish, put it into a low-temperature refrigerator at -30°C for 60 minutes (thermally induced phase separation), quickly take out the petri dish after freezing, put it into 500 mL of methanol (non-solvent induced phase separation), and remove N , N-dimethylformamide and N-methylpyrrolidone solvent, change methanol once every 6h, change 4 times, and finally freeze-dry the sample to obtain polystyrene nanofiber membrane.

[0038] 2) Soak the polystyrene nanofiber membrane in a solution of 4 g of benzophenone and 96 g of ethanol, take it out after 10 min, and dry it in vacuum to obtain an activated polystyrene nanofiber membrane for future use.

[0039] 3) Dissolve 1.88g of copper nitrate in a mixed solution of 0.72g of acrylic acid and...

Embodiment 2

[0044] 1) Add 1.0 g of polystyrene into a mixed solvent of 12.5 g of N,N-dimethylformamide and 7 g of N-methylpyrrolidone, and stir magnetically at room temperature for 6 hours to fully dissolve it to obtain a solution. Pour the solution into a petri dish, put it into a low-temperature refrigerator at -20°C for 80 minutes (thermally induced phase separation), quickly take out the petri dish after freezing, put it into 500 mL of methanol (non-solvent phase separation), remove N, The N-dimethylformamide and N-methylpyrrolidone solvents were changed to methanol once every 6 hours, and changed 4 times, and finally the samples were freeze-dried to obtain polystyrene nanofiber membranes.

[0045] 2) Soak the polystyrene nanofiber membrane in a solution of 5 g of benzophenone and 95 g of ethanol, take it out after 10 minutes, and dry it in vacuum to obtain an activated polystyrene nanofiber membrane for future use.

[0046] 3) Dissolve 1.88g of copper nitrate in a mixed solution of 1...

Embodiment 3

[0049] 1) Add 1.0 g of polystyrene into a mixed solvent of 11 g of N,N-dimethylformamide and 8 g of N-methylpyrrolidone, and magnetically stir for 6 hours at room temperature to fully dissolve it to obtain a solution. Pour the solution into a petri dish, put it in a low-temperature refrigerator at -20°C for 60 minutes (thermally induced phase separation), quickly take out the petri dish after freezing, put it in 500 mL of methanol (non-solvent phase separation), remove N, The N-dimethylformamide and N-methylpyrrolidone solvents were changed to methanol once every 6 hours, and changed 4 times, and finally the samples were freeze-dried to obtain polystyrene nanofiber membranes.

[0050] 2) Soak the polystyrene nanofiber membrane in a solution of 6 g of benzophenone and 96 g of ethanol, take it out after 10 minutes, and dry it in vacuum to obtain an activated polystyrene nanofiber membrane for future use.

[0051] 3) Dissolve 1.88g of copper nitrate in a mixed solution of 0.94g o...

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Abstract

The invention discloses a preparation method for preparing temperature-sensitive copper ion imprinted nanofiber membrane. Using cheap polystyrene as a polymer and N,N-dimethylformamide and N-methylpyrrolidone as a mixed solvent, a polystyrene nanofiber membrane is obtained by combining thermally induced phase separation and non-solvent phase separation. With fiber membrane as support, benzophenone as activator, acrylic acid and N-isopropylacrylamide were grafted onto fiber membrane by ultraviolet light-induced graft copolymerization, and Cu(Ⅱ) was used as template ion, dimethyl Ethylene glycol acrylate was used as a cross-linking agent to form ion imprinting sites through coordination bonds. Finally, the template ions were removed by washing with hydrochloric acid to obtain a temperature-sensitive copper ion imprinted fiber membrane. The invention uses molecular imprinting technology to modify the fiber membrane, introduces copper ion recognition sites on the fiber membrane, and endows it with the ability of highly selective separation of copper ions on the basis of retaining the advantages of the fiber membrane.

Description

technical field [0001] The invention relates to a method for preparing a copper ion imprinted nanofiber membrane, which belongs to the technical field of functional polymer porous materials. Background technique [0002] The pollution of heavy metal ions in water mainly comes from electroplating, metallurgy and mineral processing. Heavy metal ions are extremely toxic and non-biodegradable, and accumulate in the human body through the biological chain, causing irreversible health hazards to the human body. Therefore, how to control the concentration of heavy metal ions in drinking water has become the focus of scientists' research. At present, the pollution of heavy metals is mainly through physical methods such as separation, ion exchange and adsorption; chemical methods such as chemical precipitation and redox; biological methods such as phytoremediation, biosorption and bioflocculation. Adsorption method is widely used in the treatment of heavy metal ion wastewater due t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06M14/28D06M13/127D04H1/4291B01J20/26B01J20/28B01J20/30D06M101/20
CPCB01J20/268B01J20/28038B01J20/28054D04H1/4291D06M13/127D06M14/28D06M2101/20
Inventor 刘瑞来赵瑨云苏丽鳗徐婕刘俊劭
Owner 武夷学院
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