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Preparation method and application of mixed matrix membrane containing zeolite imidazolate framework material

A technology of mixed matrix membrane and zeolite imidazole, which is applied in the field of membrane separation, can solve the problems of short life, weak gas permeability, and difficult film formation brittleness, and achieve the effect of compact structure, high separation and permeability, and no introduction of impurities

Inactive Publication Date: 2016-08-24
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The inorganic membrane is a rigid membrane with strong molecular sieving ability, but it is not easy to form a membrane and is brittle and has a short life; the organic membrane is just the opposite, the gas permeability is weak, and the selectivity and permeability are contradictory. The Robeson upper limit is the characterization The mutual restriction characteristics of selectivity and permeability

Method used

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  • Preparation method and application of mixed matrix membrane containing zeolite imidazolate framework material
  • Preparation method and application of mixed matrix membrane containing zeolite imidazolate framework material
  • Preparation method and application of mixed matrix membrane containing zeolite imidazolate framework material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation of ZIF-7 / Matrimid mixed matrix film comprises the following steps:

[0023] 1. Preparation of ZIF-7 nanoparticles: 0.265 g zinc chloride (ZnCl 2 ) and 0.310 g of benzimidazole were dissolved in 30 ml of N-N dimethylformamide (DMF), added with 0.465 g of diethylamine, stirred for about 30 minutes, poured into the reactor, and reacted at 130 °C for 24 hours. After the reaction, the product was collected by centrifugation, washed three times with methanol and centrifuged, and then dried overnight in an oven at 60 °C.

[0024] 2. Preparation of film-making solution: the film-making solution required to prepare a mixed matrix film with a mass percentage of 5 wt%. Disperse 0.02 g ZIF-7 nanoparticles in chloroform, and ultrasonically disperse the ZIF-7 particles for 30 minutes. 0.38 g of Matrimid was added in batches and stirred for 48 hours to obtain a uniform film-forming solution. Sonicate and stir before scraping the film, and let stand to prepare the s...

Embodiment 2

[0027] The preparation of ZIF-7 / Matrimid mixed matrix film comprises the following steps:

[0028] 1. Preparation of ZIF-7 nanoparticles

[0029] With above-mentioned embodiment 1.

[0030] 2. Preparation of film-making solution: the film-making solution required to prepare a mixed matrix film with a mass percentage of 10 wt%. Disperse 0.04 g of ZIF-7 nanoparticles in chloroform, and ultrasonically disperse the ZIF-7 particles for 30 minutes. 0.36 g of Matrimid was added in batches and stirred for 48 hours to obtain a uniform film-forming solution. Sonicate and stir before scraping the film, and let stand to prepare the scraping film.

[0031] 3. Film making

[0032] With above-mentioned embodiment 1.

Embodiment 3

[0034] The preparation of ZIF-7 / Matrimid mixed matrix film comprises the following steps:

[0035] 1. Preparation of ZIF-7 nanoparticles

[0036] Same as previous embodiment 1.

[0037] 2. Preparation of membrane-forming solution: the membrane-forming solution required to prepare a mixed matrix membrane with a mass percentage of 20 wt%. Disperse 0.08 g of ZIF-7 nanoparticles in chloroform, and ultrasonically disperse the ZIF-7 particles for 30 minutes. 0.32 g of Matrimid was added in batches and stirred for 48 hours to obtain a uniform film-forming solution. Sonicate and stir before scraping the film, and let stand to prepare the scraping film.

[0038] 3. Film making

[0039] Same as previous embodiment 1.

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Abstract

The invention discloses a preparation method and application of a mixed matrix membrane prepared by compositing a zeolite imidazolate framework material (ZIF hereafter represents the zeolite imidazolate framework material for the sake of narration) ZIF-7 with Matrimid polymide, and belongs to the technical field of membrane separation. The membrane is the mixed matrix membrane of ZIF-7 and Matrimid polymide (the chemical name is 5(6)-amino-1-(4'-aminophenyl)-1,3-trimethyl indene alkane, the trade name is Matrimid-5218, and Matrimid hereafter represents Matrimid polymide for the sake of narration), that is, the ZIF-7-Matrimide membrane and is used for separation of H2-CO2 mixed gas. The preparation method has the advantages that the preparation cost of ZIF-7 is lower than that of many MOF materials; the ZIF-7-Matrimid membrane combines the advantages of the zeolite imidazolate framework material ZIF-7 with the advantages of the polymer material Matrimid, and compared with a pure Matrimid membrane, the ZIF-7-Matrimid membrane has the advantages that the permeability is greatly improved, and the high selectivity is kept; the membrane shows the very good separation effect on the H2-CO2 mixed gas and has the huge application value in the fields of water gas hydrogen production.

Description

technical field [0001] The invention relates to the field of membrane separation, in particular to a preparation method and application of a ZIF-7 / Matrimid mixed matrix membrane used for gas separation and purification in the chemical industry. Background technique [0002] As a new type of clean energy, hydrogen provides new solutions to environmental and energy issues. One of the main ways of large-scale production of hydrogen at present is hydrogen production by water gas method, and the main products of this method are hydrogen and carbon dioxide. The traditional hydrogen purification method is the solution absorption method. This method has complex equipment, and the solution treatment will have certain environmental impacts. The method of membrane separation is adopted, the equipment is simple, energy-saving and environment-friendly, and the cost is low at the same time. [0003] Gas membrane separation is a green and sustainable separation technology. Compared with...

Claims

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Application Information

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IPC IPC(8): B01D69/14B01D71/64B01D67/00B01D53/22C01B3/50
CPCB01D53/228B01D67/0079B01D69/148B01D71/028B01D71/64C01B3/503C01B2203/0475Y02P20/151
Inventor 董新宇刘文庆沈琴方旭磊
Owner SHANGHAI UNIV
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