Zeolite imidazate-doped polyether block amide gas separation membrane, and preparation method and application thereof

A polyether block amide and zeolite imidazolate technology, which is applied in separation methods, specific gas purification/separation, semi-permeable membrane separation, etc., can solve the problems of separation performance limitation, poor membrane plasticity, and high price, and achieve membrane production The effect of simple process, easy operation and mild conditions

Active Publication Date: 2018-06-01
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In gas separation membranes, inorganic membranes have the advantages of stable chemical properties, easy regeneration, and corrosion resistance to various acid and alkali media, but their development is limited due to poor plasticity, easy damage, and high price; Membranes are widely used to separate CO due to their high mechanical properties and strong reproducibility. 2 , but its separation performance is limited by the trade-off

Method used

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  • Zeolite imidazate-doped polyether block amide gas separation membrane, and preparation method and application thereof
  • Zeolite imidazate-doped polyether block amide gas separation membrane, and preparation method and application thereof
  • Zeolite imidazate-doped polyether block amide gas separation membrane, and preparation method and application thereof

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Experimental program
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Embodiment 1

[0045] Embodiment 1: the Zn / Ni-ZIF-8-PEBA mixed matrix membrane that the mass percentage that the additive Zn / Ni-ZIF-8 accounts for matrix is ​​10wt% is prepared, the steps are as follows:

[0046] Step 1. Preparation of Zn / Ni-ZIF-8: Dissolve 4mmol of zinc nitrate hexahydrate, 4mmol of nickel nitrate hexahydrate, and 60mmol of 2-methylimidazole in 100mL of methanol solution, and then put them into 10g of 4A molecular sieve Let it stand for 10 hours to remove excess water to obtain a methanol solution of zinc nitrate hexahydrate (named product E), a methanol solution of nickel nitrate hexahydrate (named product F) and a methanol solution of 2-methylimidazole (named product G ); then, pour product E, product F and product G into a three-necked flask, stir at 25°C for 24 hours to undergo a chemical reaction, centrifuge the resulting solution at a speed of 10,000 rpm for 50 minutes, and wash the lower precipitate in the centrifuge tube with methanol three times, Dry in a vacuum ov...

Embodiment 2

[0052] Embodiment 2: the Zn / Ni-ZIF-8-PEBA mixed matrix film that Zn / Ni-ZIF-8 accounts for the mass percentage of matrix is ​​5wt% is prepared, and the steps are as follows:

[0053] Step 1. Preparation of Zn / Ni-ZIF-8: Dissolve 6mmol of zinc nitrate hexahydrate, 6mmol of nickel nitrate hexahydrate, and 60mmol of 2-methylimidazole in 100mL of methanol solution, and then put them into 15g of 4A molecular sieve Let it stand for 20 hours to remove excess water, and obtain a methanol solution of zinc nitrate hexahydrate (named product E), a methanol solution of nickel nitrate hexahydrate (named product F) and a methanol solution of 2-methylimidazole (named product G ); Then, pour product E, product F and product G into a three-necked flask, stir at 40°C for 24 hours to undergo a chemical reaction, centrifuge the resulting solution at a speed of 10,000 rpm for 50 minutes, and wash the lower sediment in the centrifuge tube with methanol three times, Dry in a vacuum oven at 90ºC for 24...

Embodiment 3

[0057] Embodiment 3: the Zn / Ni-ZIF-8-PEBA mixed matrix film that Zn / Ni-ZIF-8 accounts for the mass percentage of matrix is ​​15wt% is prepared, and the steps are as follows:

[0058] Step 1. Preparation of Zn / Ni-ZIF-8: Dissolve 3mmol of zinc nitrate hexahydrate, 3mmol of nickel nitrate hexahydrate, and 60mmol of 2-methylimidazole in 100mL of methanol solution, and then put them into 5g of 4A molecular sieve Let it stand for 20 hours to remove excess water, and obtain a methanol solution of zinc nitrate hexahydrate (named product E), a methanol solution of nickel nitrate hexahydrate (named product F) and a methanol solution of 2-methylimidazole (named product G ); Then, pour product E, product F and product G into a three-necked flask, stir at 60°C for 24 hours to undergo a chemical reaction, centrifuge the resulting solution at a speed of 8000 rpm for 30 minutes, and wash the lower sediment in the centrifuge tube with methanol three times, Dry in a vacuum oven at 100ºC for 12 ...

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Abstract

The invention discloses a zeolite imidazate-doped polyether block amide (PEBA) gas separation membrane, and a preparation method and application thereof. According to the preparation method provided by the invention, two inorganic nano-materials, i.e. ZIF-8 and Zn/Ni-ZIF-8 are successfully prepared and are mixed and stirred with polyether block amide at 40 to 80 DEG C, and a ZIF-8-PEBA and Zn/Ni-ZIF-8-PEBA mixed matrix membrane is prepared through a dry phase transformation method. The zeolite imidazate-doped polyether block amide gas separation membrane, and the preparation method and the application thereof provided by the invention have the advantages that the preparation method of the inorganic materials is simple, the conditions are mild, the operation is easy, and the inorganic material is environmentally friendly; the prepared membrane is acid and alkali resistant and good in flexibility; the membrane has excellent comprehensive performance when being used for gas separation; particularly, the Zn/Ni-ZIF-8-PEBA mixed matrix membrane with the adding content being 10 percent by weight has high CO2 permeation flux and CO2/N2 selectivity.

Description

technical field [0001] The invention relates to a polyether block amide gas separation membrane doped with zeolite imidazolate, a preparation method and application thereof, and belongs to the technical field of gas separation membranes. Background technique [0002] As the problem of global warming has attracted more and more attention, it is necessary to solve the problem of carbon dioxide (CO2) in the atmosphere 2 ) emissions and use effective methods to capture CO 2 is an urgent problem to be solved. In addition, carbon dioxide (CO 2 ) can be used as a potential "carbon resource", and has always attracted much attention in the fields of aerospace and military equipment. CO 2 The separation and recovery technologies mainly include absorption separation method, adsorption separation method, low temperature distillation separation method and membrane separation method. Compared with other methods, the membrane separation method has the advantages of high separation eff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/80B01D67/00B01D53/22C01B21/04C01B32/50
CPCB01D53/228B01D67/0079B01D71/80C01B21/0444C01B2210/0012Y02C20/40Y02P20/151
Inventor 张新儒王永洪张桃刘成岑李海霞宗智鑫
Owner TAIYUAN UNIV OF TECH
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