Dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane and preparation and application thereof

A polyether copolyamide and organic compound technology, which is applied in the field of gas membrane separation membrane preparation, can solve the problems that have not been reported in the research, and achieve the effect of excellent separation performance, long-lasting physical structure and performance, and good compatibility

Inactive Publication Date: 2017-01-11
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are many reports on the use of DA to modify inorganic partic

Method used

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  • Dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane and preparation and application thereof
  • Dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane and preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The preparation of dopamine-modified metal-organic compound / polyether copolyamide mixed matrix film comprises the following steps, and the formula ratio is by mass percentage:

[0021] (1) Preparation of dopamine-modified metal-organic compounds: Add dopamine to tris buffer at pH 8.0 to configure a dopamine solution with a concentration of 1 mg / ml, according to the mass of metal-organic compounds (ZIF-8) and dopamine The ratio is 1:2, ZIF-8 is added to the above solution, stirred and reacted at room temperature for 3 hours, centrifuged, washed with water, and dried to obtain a black dopamine-modified metal organic compound (PDA@ZIF-8);

[0022] (2) Preparation of mixed matrix membrane: dissolve polyether block copolyamide (PEBA4033) in n-butanol, and configure a polyether block copolyamide solution with a concentration of 3%; according to PEBA4033 and PDA in step (1) The mass ratio of @ZIF-8 is 0.85:0.15. Add PDA@ZIF-8 to the above PEBA4033 solution, stir at room temper...

Embodiment 2

[0025] The preparation of dopamine-modified metal-organic compound / polyether copolyamide mixed matrix film comprises the following steps, and the formula ratio is by mass percentage:

[0026] (1) Preparation of dopamine-modified metal-organic compounds: Add dopamine to tris buffer at pH 8.0 to configure a dopamine solution with a concentration of 1 mg / ml, according to the mass of metal-organic compounds (ZIF-8) and dopamine The ratio is 1:5, ZIF-8 is added to the above solution, stirred and reacted at room temperature for 12 hours, centrifuged, washed with water, and dried to obtain a black dopamine-modified metal organic compound (PDA@ZIF-8);

[0027] (2) Preparation of mixed matrix membrane: dissolve polyether block copolyamide (PEBA2533) in n-butanol, and configure a polyether block copolyamide solution with a concentration of 10%; according to PEBA2533 and PDA in step (1) The mass ratio of @ZIF-8 is 0.95:0.05. Add PDA@ZIF-8 to the above PEBA2533 solution, stir at room temp...

Embodiment 3

[0030] The preparation of dopamine-modified metal-organic compound / polyether copolyamide mixed matrix film comprises the following steps, and the formula ratio is by mass percentage:

[0031] (1) Preparation of dopamine-modified metal-organic compounds: Add dopamine to tris buffer at pH 8.0 to form a dopamine solution with a concentration of 1 mg / ml. The ratio is 1:5, ZIF-7 is added to the above solution, stirred and reacted at room temperature for 10 h, centrifuged, washed with water, and dried to obtain a black dopamine-modified metal organic compound (PDA@ZIF-7);

[0032] (2) Preparation of mixed matrix membrane: dissolve polyether block copolyamide (PEBA3533) in n-butanol, and configure a polyether block copolyamide solution with a concentration of 8%; according to PEBA3533 and PDA in step (1) The mass ratio of @ZIF-7 is 0.90:0.10. Add PDA@ZIF-7 to the above PEBA3533 solution, stir at room temperature for 20 hours, let it stand for 1 hour to defoam, and then apply it on a ...

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Abstract

The invention relates to a dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane for gas separation, and belongs to the technical field of membrane separation. The dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is characterized in that the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is mainly made of dopamine, metal organic compounds and polyether co-polyamide; the surfaces of the metal organic compounds are modified by the dopamine at first, then the modified metal organic compounds and the polyether co-polyamide are mixed and stirred with one another at certain temperatures, and the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane with a controllable thickness can be obtained by the aid of scrape coating technologies. Compared with the traditional metal organic compound mixed substrate membranes, the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane has the advantages that defects of interfaces between the metal organic compounds and polymer substrates can be obviously improved, and the affinity of the metal organic compounds and the polymer substrates can be improved; the dopamine-modified metal organic compound/polyether co-polyamide mixed substrate membrane is high in gas permeation flux, has a high separation factor and is particularly applicable to separating carbon dioxide in the air.

Description

technical field [0001] The invention relates to a dopamine-modified metal organic compound / polyether copolyamide mixed matrix membrane for gas separation, belonging to the field of gas membrane separation membrane preparation. Background technique [0002] carbon dioxide (CO 2 ) from other gases (such as N 2 、CH 4 、H 2 ) is separated from the mixed gas, which is an important separation process in the fields of environment, energy, chemical industry and so on. Compared with traditional separation technology, membrane separation technology has the advantages of less investment, simple equipment, low energy consumption, easy operation, safety and no pollution. Mixed matrix membranes are one of the research hotspots in the field of gas separation due to the combination of the characteristics of easy processing of organic polymer membranes and high selectivity of inorganic membranes. At present, there have been many reports on the preparation of organic-inorganic blend membr...

Claims

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Application Information

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IPC IPC(8): B01D71/80B01D67/00B01D53/22C01B32/50
CPCB01D53/228B01D67/0002B01D71/80Y02C20/40Y02P20/151
Inventor 陈明清董亮亮施冬健
Owner JIANGNAN UNIV
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