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Gas separation membrane containing MOF composite material, and preparation method thereof

A technology for gas separation membranes and composite materials, which is applied to gas separation membranes containing MOF composite materials and their preparation, and the field of membrane materials, which can solve the problems of low selectivity, limited practical application, and difficult accumulation of molecular chains.

Inactive Publication Date: 2020-12-01
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because its molecular chain is a rigid trapezoidal helical structure, the molecular chains of PIM-1 are not easy to accumulate, thus forming many irregular microporous structures and large free volumes, so it has good gas permeability and is suitable for the preparation of mixed matrix gases. A good polymer material for separation membranes, but its practical application is limited due to its relatively low selectivity

Method used

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  • Gas separation membrane containing MOF composite material, and preparation method thereof
  • Gas separation membrane containing MOF composite material, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Add 50mmol of fumaric acid and 50mmol of zirconium oxychloride octahydrate into the reaction kettle, and the solvent is a mixed solvent of N,N-dimethylformamide and formic acid (20:7 by volume). Then put the reaction kettle in an oven at 130°C for 6 hours. The resulting white precipitate was soaked in 100 ml of methanol for 72 hours, and then washed three times with an appropriate amount of N,N-dimethylformamide. Finally, the white precipitate was dried at 150 °C for 48 hours to obtain pure MOF-801 particles, and then MOF-801 was impregnated in IL methanol solution to prepare MOF-801\IL composites.

[0019] (2) Under nitrogen protection, add 0.005mol (1.702g) 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'- into the reaction vessel Spiral biindole, 0.005mol (1.005g) tetrafluoroterephthalonitrile, 1.658g anhydrous potassium carbonate, 7.5ml NMP, and 2.5ml toluene were mixed together, heated and stirred at 165°C for 4 hours to obtain the crude product, and re- Dis...

Embodiment 2

[0023] (1) Add 100mmol of fumaric acid and 100mmol of zirconium oxychloride octahydrate into the reaction kettle, and the solvent is a mixed solvent of N,N-dimethylformamide and formic acid (20:7 by volume). Then put the reaction kettle in an oven at 130°C for 6 hours. The resulting white precipitate was soaked in 200 ml of methanol for 72 hours, and then washed three times with an appropriate amount of N,N-dimethylformamide. Finally, the white precipitate was dried at 150 °C for 48 h to obtain pure MOF-801 particles, and then MOF-801 was impregnated in IL methanol solution to prepare MOF-801\IL composites.

[0024] (2) Under nitrogen protection, add 0.01mol (3.404g) 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'- into the reaction vessel Spiral biindole, 0.01mol (2.01g) tetrafluoroterephthalonitrile, 3.316g anhydrous potassium carbonate, 15ml NMP, and 5ml toluene were mixed together, heated and stirred at 165°C for 4 hours to obtain a crude product, which was redissolved ...

Embodiment 3

[0028] (1) Add 200mmol of fumaric acid and 200mmol of zirconium oxychloride octahydrate into the reactor, and the solvent is a mixed solvent of N,N-dimethylformamide and formic acid (20:7 by volume). Then put the reaction kettle in an oven at 130°C for 6 hours. The resulting white precipitate was soaked in 400 ml of methanol for 72 hours, and then washed three times with an appropriate amount of N,N-dimethylformamide. Finally, the white precipitate was dried at 150 °C for 48 h to obtain pure MOF-801 particles, and then MOF-801 was impregnated in IL methanol solution to prepare MOF-801\IL composites.

[0029] (2) Under nitrogen protection, add 0.02mol (6.808g) 5,5',6,6'-tetrahydroxy-3,3,3',3'-tetramethyl-1,1'- into the reaction vessel Spiral biindole, 0.02mol (4.02g) tetrafluoroterephthalonitrile, 6.632g anhydrous potassium carbonate, 30ml NMP, and 10ml toluene were mixed together, heated and stirred at 165°C for 4 hours to obtain a crude product, which was redissolved in Chl...

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Abstract

The invention relates to a mixed matrix gas separation membrane material and a preparation method thereof. The mixed matrix gas separation membrane is composed of a metal-organic framework composite material and a polymer matrix, wherein a filler is an MOF-801\IL composite material with a three-dimensional structure, the polymer matrix is a microporous polymer PIM-1 with high permeability, and themass percent of the MOF-801\IL composite material with the microporous structure in the mixed matrix gas separation membrane material is 1-7%. The MOF-801\IL composite material has good affinity to CO2, and the three-dimensional porous structure of the MOF-801\IL composite material provides a selective rapid transportation channel for the passage of CO2. Meanwhile, the self-microporous polymer PIM-1 also has relatively good air permeability, and the two components are mixed to synergistically adjust gas permeability and selectivity, so the prepared novel PIM-1 mixed matrix gas separation membrane containing the MOF-801\IL composite material has relatively good gas permeability and separation performance, has good thermal stability and physical aging resistance, and has a wide applicationprospect.

Description

technical field [0001] The invention relates to a membrane material, which belongs to the field of gas separation membranes, in particular to a gas separation membrane containing MOF composite material and a preparation method thereof. Background technique [0002] CO 2 As a greenhouse gas, it is the main product of fossil burning. The greenhouse effect caused by the massive emission of greenhouse gases is the greatest challenge faced by mankind since the beginning of this century. With the development of new fossil fuel power plants and the growth of energy-intensive industries, further increases in CO2 emissions seem inevitable. As such, carbon capture and storage (CCS) is an important component of many national and global mitigation programmes. Compared with the traditional gas separation process, the membrane separation process has the advantages of simple operation, small footprint, low cost, and strong processability, making it an ideal method for carbon dioxide sep...

Claims

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Application Information

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IPC IPC(8): B01D71/72B01D67/00B01D53/22C08J5/18C08L101/12C08L87/00
CPCB01D71/72B01D67/0006B01D53/228C08J5/18B01D2257/504C08J2300/12C08J2487/00
Inventor 王哲陈文波申洪城杨灿灿刘晶
Owner CHANGCHUN UNIV OF TECH
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