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Preparation method and application of PVDF/UiO-66-NH2 imprinted composite membrane

A uio-66-nh2, composite membrane technology, applied in chemical instruments and methods, membrane, membrane technology and other directions, can solve the problems of limited use range, inability to achieve selective separation, low specificity, etc., and achieve low prices. , excellent anti-fouling performance, the effect of improving roughness

Active Publication Date: 2020-01-21
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Membrane separation technology separates the mixture through the principle of sieving, but cannot achieve selective separation, and the specificity is not strong, which seriously limits its scope of application

Method used

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  • Preparation method and application of PVDF/UiO-66-NH2 imprinted composite membrane
  • Preparation method and application of PVDF/UiO-66-NH2 imprinted composite membrane
  • Preparation method and application of PVDF/UiO-66-NH2 imprinted composite membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) UiO-66-NH 2 Preparation of nanoparticles: 141 mg 2-aminoterephthalic acid, 181 mg ZrCl 4 and 3 mL of formic acid were dissolved in 30 mL of dimethylformamide (DMF) solution, poured into a hydrothermal kettle, and subjected to constant temperature hydrothermal reaction at 120°C for 24 hours; after natural cooling, DMF and ethanol solution were centrifugally washed and dried to obtain UiO-66-NH 2 Nanoparticles;

[0030] (2) PVDF / UiO-66-NH 2 Preparation of hybrid film (PU hybrid film): 0.2 g of UiO-66-NH prepared in step (1) 2 Nanoparticles were dispersed into an ethanol / water mixed solution with a volume ratio of 1:4 as a coagulation bath; 3 g of PVDF was dissolved in 30 mL of N-methylpyrrolidone (NMP) solution, and mechanically stirred at 50 °C for 12 h to obtain PVDF Casting solution; put PVDF in a coagulation bath at 25°C for 6 h to delay phase inversion to obtain a PU hybrid film;

[0031] (3) Dopamine-modified PU membrane (pDA@PU): immerse the PU hybrid memb...

Embodiment 2

[0039] (1) UiO-66-NH 2 Preparation of nanoparticles: 281mg 2-aminoterephthalic acid, 362mg ZrCl 4 and 4 mL of formic acid were dissolved in 40 mL of dimethylformamide (DMF) solution, poured into a hydrothermal kettle, and subjected to constant temperature hydrothermal reaction at 110 °C for 30 h; after natural cooling, DMF and ethanol solution were centrifugally washed and dried. Get UiO-66-NH 2 Nanoparticles;

[0040] (2) PVDF / UiO-66-NH 2 Preparation of hybrid film (PU hybrid film): 0.3 g of UiO-66-NH prepared in step (1) 2 Nanoparticles were dispersed into an ethanol / water mixed solution with a volume ratio of 1:4 as a coagulation bath, 4 g of PVDF was dissolved in 40 mL of N-methylpyrrolidone (NMP) solution, and mechanically stirred at 50 °C for 12 h to obtain PVDF Casting solution; put PVDF in a coagulation bath at 25°C for 6 h to delay phase inversion to obtain a PU hybrid film;

[0041] (3) Dopamine-modified PU membrane (pDA@PU): immerse the PU hybrid membrane prepa...

Embodiment 3

[0044] (1) UiO-66-NH 2 Preparation of nanoparticles: 422mg 2-aminoterephthalic acid, 543mg ZrCl 4 and 5 mL of formic acid were dissolved in 50 mL of dimethylformamide (DMF) solution, poured into a hydrothermal kettle, and subjected to a constant temperature hydrothermal reaction at 130°C for 20 h; after natural cooling, centrifugal washing with DMF and ethanol solution, and drying , to get UiO-66-NH 2 Nanoparticles;

[0045] (2) PVDF / UiO-66-NH 2 Preparation of hybrid film (PU hybrid film): 0.4 g of UiO-66-NH prepared in step (1) 2 Nanoparticles were dispersed into an ethanol / water mixed solution with a volume ratio of 1:4 as a coagulation bath, 5 g of PVDF was dissolved in 50 mL of N-methylpyrrolidone (NMP) solution, and mechanically stirred at 50 °C for 12 h to obtain PVDF Casting solution; put PVDF in a coagulation bath at 30°C for 5 hours to delay phase inversion to obtain a PU hybrid film;

[0046] (3) Dopamine-modified PU membrane (pDA@PU): immerse the PU hybrid memb...

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Abstract

The invention belongs to the field of environmental functional materials, and particularly relates to a preparation method and an application of a PVDF / UiO-66-NH2 imprinted composite membrane. According to the preparation method, UiO-66-NH2 nanoparticles are modified to the surface of the PVDF membrane through a delayed phase inversion one-step method by utilizing the viscosity of PVDF, so that the roughness of the surface of the PVDF membrane is improved, and the problems that blending is easy to embed, the surface modification process is complex and the like are solved. The wettability and the molecular imprinting membrane technology are combined for the first time, so that the prepared PVDF / UiO-66-NH2 imprinting composite membrane has super-hydrophilicity / underwater super-oleophobicity,can effectively separate / adsorb antibiotics in emulsion, synergistically and selectively adsorb / separate antibiotics and separate oil-water emulsion, and has excellent anti-pollution performance. ThePVDF material used in the preparation method is low in price, the preparation method is simple, easy to control, low in energy consumption and free of secondary pollution, accords with the concept ofgreen chemistry, can be produced on a large scale and can be applied to the field of separation of antibiotics in emulsion.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, in particular to a PVDF / UiO-66-NH 2 Preparation method and application of imprinted composite membrane. Background technique [0002] Antibiotics are a class of biologically active substances produced by microorganisms or higher animals and plants in their metabolic activities. [0003] In 1929, British bacteriologist Fleming extracted and discovered penicillin from Penicillium, and used it to treat diseases, creating a precedent for humans to use antibiotics to treat diseases. With the wide application of antibiotics, many methods including extraction, adsorption, and membrane separation are commonly used for the separation or purification of antibiotics. Among them, membrane separation shows great advantages due to its advantages of low energy consumption, high separation efficiency, simple operation, and no secondary pollution. Membrane separation technology separates mixtu...

Claims

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Application Information

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IPC IPC(8): B01D69/12B01D71/34B01D67/00
CPCB01D67/0079B01D69/12B01D71/34B01D2325/36
Inventor 崔久云王倩倩周志平谢阿田闫永胜
Owner JIANGSU UNIV
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