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Polyimide mixed matrix membrane for selectively separating carbon dioxide as well as preparation and application of polyimide mixed matrix membrane

A technology of mixed matrix membrane and polyimide, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc. Excellent separation performance, the effect of maintaining stability

Active Publication Date: 2022-06-03
ZHEJIANG GONGSHANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But the current CO 2 Separation membranes have limited the promotion of polymer membrane applications because they cannot be both permeable and high-principle

Method used

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  • Polyimide mixed matrix membrane for selectively separating carbon dioxide as well as preparation and application of polyimide mixed matrix membrane
  • Polyimide mixed matrix membrane for selectively separating carbon dioxide as well as preparation and application of polyimide mixed matrix membrane
  • Polyimide mixed matrix membrane for selectively separating carbon dioxide as well as preparation and application of polyimide mixed matrix membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1.0 g of the mesoporous silica material was dried in a vacuum red oven at 60° C. for 24 hours and then placed in a desiccator for 2 hours. 1.0 g of dried mesoporous silica was added to 50 mL of acetone, and dispersed under the action of ultrasound until a uniform suspension was formed. Take 0.2g of ionic liquid [hmim]Tf 2 N was added to 50 mL of acetone solution and stirred in a water bath at 30°C until the ionic liquid was dissolved in acetone to form a homogeneous solution. The homogeneous suspension containing mesoporous silica was slowly added to the ionic liquid acetone solution, and the reaction was stirred for 24 hours in a water bath at 30°C. Then, the reaction system was suction filtered, and the solid was washed with acetone and absolute ethanol in turn, and vacuum-dried to obtain a mesoporous silica material with an immobilized ionic liquid.

[0054] The mesoporous silica of the immobilized ionic liquid prepared above was dispersed in 4,4'-diaminodiphenyl e...

Embodiment 2

[0059] 1.0 g of the mesoporous silica material was dried in a vacuum red oven at 60° C. for 24 hours and then placed in a desiccator for 2 hours. 1.0 g of dried mesoporous silica was added to 50 mL of acetone, and dispersed under the action of ultrasound until a uniform suspension was formed. Take 0.3g of ionic liquid [hmim]Tf 2 N was added to 50 mL of acetone solution and stirred in a water bath at 30°C until the ionic liquid was dissolved in acetone to form a homogeneous solution. The homogeneous suspension containing mesoporous silica was slowly added to the ionic liquid acetone solution, and the reaction was stirred for 24 hours in a water bath at 30°C. Then, the reaction system was suction filtered, and the solid was washed with acetone and absolute ethanol in turn, and vacuum-dried to obtain a mesoporous silica material with an immobilized ionic liquid.

[0060] The mesoporous silica of the immobilized ionic liquid prepared above was dispersed in 4,4'-diaminodiphenyl e...

Embodiment 3

[0065] 1.0 g of the mesoporous silica material was dried in a vacuum red oven at 60° C. for 24 hours and then placed in a desiccator for 2 hours. 1.0 g of dried mesoporous silica was added to 50 mL of acetone, and dispersed under the action of ultrasound until a uniform suspension was formed. Take 0.4g of ionic liquid [hmim]Tf 2 N was added to 50 mL of acetone solution and stirred in a water bath at 30°C until the ionic liquid was dissolved in acetone to form a homogeneous solution. The homogeneous suspension containing mesoporous silica was slowly added to the ionic liquid acetone solution, and the reaction was stirred for 24 hours in a water bath at 30°C. Then, the reaction system was suction filtered, and the solid was washed with acetone and absolute ethanol in turn, and vacuum-dried to obtain a mesoporous silica material with an immobilized ionic liquid.

[0066] The mesoporous silica of the immobilized ionic liquid prepared above was dispersed in 4,4'-diaminodiphenyl e...

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Abstract

The invention discloses a polyimide mixed matrix membrane for selectively separating carbon dioxide and preparation and application thereof.The preparation method includes the steps that 1, mesoporous silica suspension liquid and ionic liquid solution are mixed, washing and drying treatment are conducted after uniform dispersion reaction, and a mesoporous silica material immobilized with ionic liquid is obtained and recorded as a composite doping material; (2) uniformly mixing the obtained composite doping material with 4, 4 '-diaminodiphenyl ether and 3, 3', 4, 4 '-biphenyltetracarboxylic dianhydride, and adjusting the mixture to preset viscosity to obtain a membrane casting solution; and (3) coating the obtained casting membrane solution on a support material, carrying out heat treatment at 140-160 DEG C for 0.5-2 hours, heating to 350 DEG C, carrying out heat treatment for 1-3 hours, cooling to room temperature, and carrying out demolding treatment to obtain the membrane. The prepared mixed matrix membrane has good selectivity and permeability.

Description

technical field [0001] The invention relates to the technical field of gas separation membranes, in particular to a preparation method of a polyimide mixed matrix membrane doped with mesoporous silica immobilized with ionic liquid and a product thereof. Background technique [0002] Rapidly developing industries and rapidly increasing consumer demand consume more and more petroleum-based fuels every year, while emitting a large amount of CO 2 and other greenhouse gases, causing global environmental problems such as climate warming and ocean acidification. At present, governments around the world have proposed strict policies and regulations to limit the consumption of petroleum-based fuels and reduce carbon emissions. However, in the past ten years, it is still difficult to completely get rid of petroleum fuels and completely and effectively suppress carbon emissions. In addition, how to reduce the current elevated CO2 in the atmosphere? 2 Concentration is also a major cha...

Claims

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Application Information

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IPC IPC(8): B01D71/64B01D67/00B01D53/22
CPCB01D71/64B01D67/0079B01D53/228B01D2257/504Y02P20/151Y02C20/40
Inventor 王挺黄肖星张珂吴礼光蒋伶俐
Owner ZHEJIANG GONGSHANG UNIVERSITY
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