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A kind of preparation method of two-dimensional temperature-sensitive metal-organic framework nanosheet-based filter membrane

A technology of metal-organic frameworks and nanosheets, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve problems such as lack of intelligent response performance, and achieve excellent separation performance, high throughput, high retention, high The effect of porosity

Active Publication Date: 2021-07-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"American Chemical Society Applied Materials and Interfaces" (ACS Applied Materials & Interfaces, 2017, 9: 28079-28088) used two-dimensional metal-organic framework nanosheets to form a membrane by suction filtration, and obtained a filter membrane with excellent separation performance, but it does not have intelligent response performance

Method used

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  • A kind of preparation method of two-dimensional temperature-sensitive metal-organic framework nanosheet-based filter membrane
  • A kind of preparation method of two-dimensional temperature-sensitive metal-organic framework nanosheet-based filter membrane
  • A kind of preparation method of two-dimensional temperature-sensitive metal-organic framework nanosheet-based filter membrane

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) 20 g of zinc nitrate, 3.6 g of pyrazine, 80 g of polyvinylpyrrolidone / polyvinylhexamide (mass 3 / 1, polyvinylpyrrolidone molecular weight 30000-40000, is purchased from Aladdin Company; polyvinylhexhalanamide molecular weight 4000 -6000, by free radical polymeridinol-acamlamide, raw materials were purchased from Aladdin Company) dissolved in 36L dimethylformamide / ethanol (volume ratio 3 / 1) mixed solvent to obtain solution A.

[0034] (2) 12 g of four (4-carboxyphenyl) porphin is dissolved in 12L dimethylformamide / ethanol (volume ratio 3 / 1) mixed solvent to obtain solution B.

[0035] (3) Mix the solution A with the solution B, soon 30 min, then the heat reaction was 16 h at an 80 ° C solvent. The product was washed 3 times with ethanol to give a surface-modified two-dimensional temperature-sensitive metal organic frame nanofer with a polymer.

[0036] (4) The film was prepared on the cellulose base film (purchased from Millipore, aperture 200 μm) using a two-dimens...

Embodiment 2

[0040] (1) 10 g of zinc chloride, 1.8 g pyrazine, 50 g of polyvinylpyrrolidone / polyvinylhexamide (mass ratio 2 / 1, polyvinylpyrrolidone molecular weight 8000-12000, is purchased from Aladdin Company; polyvinylhexamide molecular weight 2000-3000, by free radical polymerous achexhelated lactam, raw materials were purchased from Aladdin Company) to dissolve in 18 L Dimethylformamide / ethanol (volume ratio 3 / 1) mixed solvent to obtain solution A.

[0041] (2) 6 g of four (4-carboxybar) porphin is dissolved in 6L dimethylformamide / ethanol (volume ratio 3 / 1) mixed solvent to obtain solution B.

[0042] (3) Mix the solution A with the solution B, soon 30 min, then the heat reaction was thermally reacted at 80 ° C. The product was washed 3 times with ethanol to give a surface-modified two-dimensional temperature-sensitive metal organic frame nanofer with a polymer.

[0043] (4) The film was prepared on the nylon base film (purchased from Millipore, aperture 200 μm) using a two-dimensi...

Embodiment 3

[0047] (1) 40 g of zinc acetate, 8 g pyrazine, 200 g of polyisopropyl acrylamide / polyvinylhexamide (mass ratio 1 / 4, polyisopropyl acrylamide molecular weight 8000-12000, by free radical poly] Home purchase from Aladdin; polyvinylhexamide molecular weight 2000-3000, by free radical polymerous achexhelated lactam, raw materials are purchased from Aladdin Company) mixed at 72L dimethylformamide / ethanol (volume ratio 3 / 1) Dissolve in the solvent to obtain a solution A.

[0048] (2) 25 g of tetra (4-carboxybar) porphin is dissolved in 30 l Dimethylformamide / ethanol (volume ratio 3 / 1) mixed solvent to obtain solution B.

[0049] (3) Mix the solution A with solution B, soon 30 min, then the heat reaction was heat 15 h at a solvent at 80 ° C. The product was washed 3 times with ethanol to give a surface-modified two-dimensional temperature-sensitive metal organic frame nanofer with a polymer.

[0050] (4) The film was prepared on a polycarbonate base film (purchased from Millipore, ...

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Abstract

The invention relates to a preparation method of a two-dimensional temperature-sensitive metal-organic framework nano-sheet-based filter membrane. First, the interaction between polymers and metal-organic framework nanoparticles is used to inhibit the growth of the metal-organic framework nanoparticles in the Z-axis direction, and the The surface is modified to obtain two-dimensional temperature-sensitive metal-organic framework nanosheets, which are then fabricated into films and subjected to surface polymerization. The novel filter membrane of the invention has the intelligent property that the flux is variable with temperature and salt concentration. At the same time, the high specific surface area, high porosity of 2D metal-organic framework nanosheets and the modification of the surface polymer layer also make this new type of membrane have excellent separation performance with high flux and high rejection. The method of the invention has the advantages of simple operation, environmental friendliness, easy batch and large-scale production, good industrial production basis and broad application prospect.

Description

Technical field [0001] The present invention belongs to the fabrication of the film, and more particularly to a method of preparing a two-dimensional temperature-sensitive metal organic frame nanofer filter. Background technique [0002] Pressure driven film technology is the most widely used membrane process. It is increasingly widely used in the fields of water treatment, and the separation performance of the filter membrane, the retention rate, and the like is increasingly demanding. However, the flux and interceptability of conventional polymer-based films often exist "exchange" effect, that is, improvement of certain properties to reduce another performance. This "exchange" effect largely limits the development of high performance films. In addition, with social development and the extension of application scenarios, the pressure-driven film has also begun to propose intelligent responsiveness. Thus, there is an urgent need to develop new film materials to meet excellent sep...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D67/00B01D69/12B01D71/02B01D71/06B01D71/10B01D71/48B01D71/68
Inventor 武培怡贾炜
Owner DONGHUA UNIV
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