Preparation method and application of polydopamine modified ZIF-8 functionalized nanofiber membrane

A ZIF-8, nanofiber membrane technology, applied in chemical instruments and methods, fiber types, fiber processing, etc., can solve the problems of poor practical applicability of adsorbents, complicated use of adsorbents, and inability to reuse them. Application prospect, low cost, good film-forming effect

Pending Publication Date: 2019-04-05
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the use of the adsorbent is complicated, and it needs to be stirred during the adsorption process; and the material is powdery, which is difficult to recycle after

Method used

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  • Preparation method and application of polydopamine modified ZIF-8 functionalized nanofiber membrane
  • Preparation method and application of polydopamine modified ZIF-8 functionalized nanofiber membrane
  • Preparation method and application of polydopamine modified ZIF-8 functionalized nanofiber membrane

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Experimental program
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Effect test

Embodiment 1

[0029]Dissolve polyacrylonitrile in the solvent N,N-dimethylformamide, heat and stir at 70°C until completely dissolved, wherein the mass fraction of polyacrylonitrile is 8.5wt%; after the solution is completely dissolved, a spinning solution is obtained, Electrospin the spinning solution; take 80mL of 50mM tris(hydroxymethyl)aminomethane hydrochloride buffer solution, adjust the pH to 8.5 with 0.1M HCl and 0.1M NaOH, then add 180mg of dopamine hydrochloride to obtain a mixed solution . The obtained 120mg electrospun nanofibers were soaked with absolute ethanol and placed in the mixed solution, heated and stirred at 45°C for 24h, then placed in a drying oven at 60°C for 8h; the obtained nanofiber membrane was immersed in Into 20mL of an aqueous solution containing 0.1095g of zinc nitrate hexahydrate, ultrasonically for 10min, and heated and stirred at 45°C for 30min, then add 20mL of an aqueous solution containing 2.2659g of 2-methylimidazole, and stand at 45°C for 30min; cool...

Embodiment 2

[0031] Dissolve polyacrylonitrile in the solvent N,N-dimethylformamide, heat and stir at 65°C until completely dissolved, wherein the mass fraction of polyacrylonitrile is 9wt%; after the solution is completely dissolved, a spinning solution is obtained, and the The spinning solution is electrospun; take 80mL of 45mM tris(hydroxymethyl)aminomethane hydrochloride buffer solution, adjust the pH to 8.0 with 0.1M HCl and 0.1M NaOH, and then add 200mg of dopamine hydrochloride to obtain a mixed solution. The obtained 200mg electrospun nanofibers were soaked with absolute ethanol and placed in the mixed solution, heated and stirred at 45°C for 24h, then placed in a drying oven at 60°C for 8h; the obtained nanofiber membrane was immersed in Into 40mL of an aqueous solution containing 0.2513g of zinc nitrate hexahydrate, ultrasonicated for 10min, heated and stirred at 45°C for 50min, then added 40mL of an aqueous solution containing 5.0132g of 2-methylimidazole, and kept at 45°C for 40...

Embodiment 3

[0033] Dissolve polyacrylonitrile in the solvent N,N-dimethylformamide, heat and stir at 70°C until completely dissolved, wherein the mass fraction of polyacrylonitrile is 8.5wt%; after the solution is completely dissolved, a spinning solution is obtained, Electrospin the spinning solution; take 80mL of 50mM tris(hydroxymethyl)aminomethane hydrochloride buffer solution, adjust the pH to 8.3 with 0.1M HCl and 0.1M NaOH, then add 220mg of dopamine hydrochloride to obtain a mixed solution . The obtained 150 mg electrospun nanofibers were soaked with absolute ethanol and placed in the mixed solution, heated and stirred at 45°C for 24 hours, then placed in a drying oven at 60°C for 8 hours; the obtained nanofiber membrane was immersed in Into 30mL aqueous solution containing 0.2945g zinc nitrate hexahydrate, ultrasonic 10min, and heated and stirred at 45°C for 1h, then add 30mL aqueous solution containing 4.9260g 2-methylimidazole, and stand at 45°C to continue heating for 1h; Aft...

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Abstract

The invention relates to a preparation method of a polydopamine modified ZIF-8 functionalized nanofiber membrane and application of the membrane in antibiotic adsorption. The functionalized nanofibermembrane is prepared through the electrospinning technology and a conventional solution method, polyacrylonitrile serves as a base, the surface of the polyacrylonitrile is wrapped with polydopamine toimprove the polydopamine, so that ZIF-8 crystal particles easily grow on the outermost layer of the polyacrylonitrile. The obtained polydopamine modified ZIF-8 functionalized nanofiber membrane can effectively adsorb tetracycline antibiotics from an aqueous solution, and the obtained polydopamine modified ZIF-8 functionalized nanofiber membrane has excellent recycling ability. The preparation process is simple and feasible, raw materials are easy to obtain and environmentally friendly, the cost is low, and the method has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of environmental nano new functional materials, and in particular relates to a polydopamine-based ZIF-8 functionalized nanofiber membrane, a preparation method thereof, and an application in antibiotic adsorption. Background technique [0002] In recent years, electrospun nanofibers have been widely studied by scholars in the field of sewage treatment. Due to the miniaturization of the size of the electrospun nanofiber material, the nanofiber material maintains the original chemical and physical properties, and the fiber membrane also has a high specific surface area, high porosity and good pore connectivity. In addition, electrospun nanofibers can be easily functionalized or obtain specific favorable structures to further enhance the adsorption capacity, making them excellent candidates as adsorbents. [0003] Metal-organic framework compounds generally refer to metal-organic framework crystalline material...

Claims

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Application Information

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IPC IPC(8): D06M15/37D04H1/728D04H1/548D01D5/00B01J20/22B01J20/28B01J20/30C02F1/28C02F101/30D06M101/28
CPCB01J20/226B01J20/28011B01J20/28033C02F1/288C02F2101/30D01D5/003D04H1/548D04H1/728D06M15/37D06M2101/28
Inventor 李响晁珅
Owner JILIN UNIV
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