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Preparation method and application of metal organic framework thin film on surface of macroporous high polymer hollow fiber pipe

A high-molecular polymer and metal-organic framework technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as high cost, low stability, and restrictions on industrialized large-scale production, so as to expand the scope of application, The effect of low cost and easy large-scale promotion

Inactive Publication Date: 2014-02-12
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, many metal-organic framework thin films are prepared on the surface of hollow fiber membranes of ceramic materials, but ceramic materials limit their industrial scale production due to their relatively high cost and low stability in hydrothermal growth.

Method used

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  • Preparation method and application of metal organic framework thin film on surface of macroporous high polymer hollow fiber pipe
  • Preparation method and application of metal organic framework thin film on surface of macroporous high polymer hollow fiber pipe
  • Preparation method and application of metal organic framework thin film on surface of macroporous high polymer hollow fiber pipe

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Experimental program
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Effect test

Embodiment 1

[0036] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate, zinc nitrate or cadmium nitrate aqueous solution, after 1 minute, slow down the stirring speed, and seal the reaction vessel, 24 hours, 1 hour, 1 After one hour, obtain copper hydroxide, zinc hydroxide or cadmium hydroxide nanowire solutions respectively, and soak the porous polymer hollow fiber membrane with one end closed and the other end connected to the suction filter pump into the solution containing nanowires for 30 minutes Finally, a nanowire layer with a thickness of 5 μm is obtained on its surface;

[0037] 2) Add the nanowire layer to a mixed solution containing 10 ml of trimesic acid at a concentration of 20 mM and ethanol water (volume ratio 1:1), and react at room temperature for 60 minutes to obtain a metal-organic framework with a thickness of 5 μm object film.

Embodiment 2

[0039] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate, zinc nitrate or cadmium nitrate aqueous solution. After 1 minute, slow down the stirring speed and seal the reaction vessel. After 24 hours, the Copper, zinc hydroxide or cadmium hydroxide nanowire solution, the porous polymer hollow fiber membrane with one end closed and the other end connected to the suction filter pump is immersed in the solution containing nanowires, and a thickness of 10 μm is obtained on the surface after 60 minutes nanowire layer;

[0040]2) Add the nanowire layer to a mixed solution containing 15 ml of 10 mM trimesic acid solvent and ethanol water (volume ratio 1:1), react at room temperature for 60 minutes, and obtain a 10 μm thick metal organic layer Frame film, see figure 2 , image 3 .

Embodiment 3

[0042] 1) Under magnetic stirring, add 1.4 mM ethanolamine aqueous solution to the same volume of 4 mM copper nitrate, zinc nitrate or cadmium nitrate aqueous solution, after 1 minute, slow down the stirring speed, and seal the reaction vessel, 24 hours, 1 hour, 1 After one hour, obtain copper hydroxide, zinc hydroxide or cadmium hydroxide nanowire solutions respectively, and soak the porous polymer hollow fiber membrane with one end closed and the other end connected to the suction filter pump into the solution containing nanowires for 60 minutes Finally, a nanowire layer with a thickness of 10 μm is obtained on its surface;

[0043] 2) Add the nanowire layer to a mixed solution containing 18ml of 20mM trimesic acid solvent and ethanol water (1:1 volume ratio), react at room temperature for 60 minutes, and obtain a 10μm thick metal organic framework film, see Figure 4 , Figure 5 .

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Abstract

The invention discloses a preparation method and application of a metal organic framework thin film on the surface of a macroporous high polymer hollow fiber pipe. The method comprises the following steps of (1) adding an aqueous solution of ethanolamine into an aqueous solution of copper nitrate, zinc nitrate or cadmium nitrate with the same volume while magnetic stirring, reducing stirring speed, obtaining a corresponding solution of copper hydroxide, zinc hydroxide or cadmium hydroxide nanowires, impregnating a macroporous high polymer hollow fiber film of which one end is sealed and the other end is connected with a suction filtration pump into the solution containing the nanowires, and performing suction filtration for 30 minutes to form a nanowire layer on the surface of the macroporous high polymer hollow fiber film; (2) impregnating the macroporous high polymer hollow fiber film with the nanowire layer on the surface into an organic ligand solution, and performing reaction for 30 minutes at normal temperature. According to the method and the application, a dense organic framework thin film can be directly prepared on the surface of the macroporous high polymer hollow fiber pipe, and can be used for gas separation, the method comprises simple operating steps, and is environment-friendly, and reaction residuals can be easily recovered.

Description

technical field [0001] The invention relates to a preparation method of a microporous gas separation membrane, in particular to a method for rapidly preparing a metal-organic framework gas separation membrane on the surface of a porous polymer hollow fiber tube and its application. technical background [0002] Due to their high porosity and good chemical stability, metal-organic framework films have good application prospects in many fields such as adsorption and separation, catalytic reactions, drug carriers and optical materials. At present, most metal-organic framework thin films are mainly based on planar substrates, and the preparation steps are relatively cumbersome, and most of them need to be synthesized at a relatively high temperature. Hollow fiber membranes are widely used in industry because they can improve the effective utilization of space. Therefore, metal-organic framework films need to be prepared on the surface of hollow fiber membranes for their industri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/04B01D67/00B01D53/22
Inventor 彭新生毛祎胤
Owner ZHEJIANG UNIV
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