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Preparation method of membrane for supporting supermolecule ion liquid gel

An ionic liquid and supramolecular technology, applied in the field of membrane separation, can solve the problems of poor stability and easy leakage of the support liquid membrane, and achieve the effects of enhancing performance stability, avoiding liquid leakage and simple preparation method.

Inactive Publication Date: 2014-03-26
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the disadvantages of easy leakage and poor stability of the existing supported liquid membrane, provide a preparation method of supported supramolecular ionic liquid gel membrane, and use it for the separation of acid gas in mixed gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] A method for preparing a supported supramolecular ionic liquid gel membrane, characterized in that the preparation steps are as follows, and its formula is calculated in parts by mass: first, 95 parts of 1-octyl-3-methylimidazolium hexafluorophosphate, 5 Parts of 4,4'-bis(octylamido)diphenyl ether. Mix evenly to obtain a gel precursor solution; after vacuum degassing the polyethylene microporous membrane with a pore size of 1 micron for 5 hours, immerse it in the gel precursor solution, take it out after 30 minutes, and take out the membrane surface with filter paper Excess solution; placed at room temperature for 24 hours to obtain a supported supramolecular gel gas separation membrane.

[0015] It is measured that the permeability of the membrane to sulfur dioxide is 360 barrer, and the selectivity of the membrane to carbon dioxide and nitrogen is 56.

Embodiment 2

[0017] A preparation method for supporting a supramolecular ionic liquid gel membrane is characterized in that the preparation steps are as follows, and its formula is calculated in parts by mass: first, 70 parts of 1-butyl-3-methylimidazolium tetrafluoroborate, 30 parts of 4,4'-bis(stearamido)diphenyl ether. Mix evenly to obtain a gel precursor solution; after vacuum degassing the polypropylene microporous membrane with a pore size of 0.5 micron for 1 hour, immerse it in the gel precursor solution, take it out after 10 minutes, and take out the membrane surface with filter paper Excess solution; leave it at room temperature for 48 hours to obtain a supported supramolecular gel gas separation membrane.

[0018] It is measured that the permeability of the membrane to carbon dioxide is 245 barrer, and the selectivity of the membrane to carbon dioxide and nitrogen is 36.

Embodiment 3

[0020] A preparation method for supporting a supramolecular ionic liquid gel membrane, characterized in that the preparation steps are as follows, and its formula is calculated in parts by mass: first, 90 parts of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonyl Imine salt, 10 parts of 4,4'-bis(caproylamido)diphenyl ether. Mix evenly to obtain a gel precursor solution; vacuum degas the polyvinylidene fluoride microporous membrane with a pore size of 0.1 micron for 3 hours, then immerse it in the gel precursor solution, take it out after 30 minutes, and take out the membrane with filter paper Excess solution on the surface; place it at room temperature for 48 hours to obtain a supported supramolecular gel gas separation membrane.

[0021] It is measured that the permeability of the membrane to carbon dioxide is 435 barrer, and the selectivity of the membrane to carbon dioxide and hydrogen is 55.

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Abstract

The invention relates to a preparation method for a membrane for supporting supermolecule ion liquid gel, and belongs to the technical field of membrane separation. The membrane consists of porous membrane loaded supermolecule ion liquid gel with the mass accounts for 30%-80% of the total mass of the gel support membrane, wherein the porous membrane is a macromolecule microporous membrane, and has the thickness of 100-200 microns; the supermolecule ion liquid gel is formed by gel factors in an ion liquid by self-assembling and gathering under non-covalent interaction; the mass of the ion liquid accounts for 70%-95% of the total gel mass of the gel. The membrane for supporting the supermolecule ion liquid gel, which is prepared by adopting the method disclosed by the invention, not only has high gas permeation flux and large gas separation factors, but also can prevent the liquid leakage under a relatively high transmembrane pressure, can intensify the performance stability, and prolong the service life. The prepared membrane for supporting the supermolecule ion liquid gel is mainly applied to the fields of acid gas collection of industrial emitted gases, CO2 separation in enclosed cabins of spacecrafts, submarines and the like.

Description

technical field [0001] The invention relates to a preparation method of a supported supramolecular ionic liquid gel membrane, which belongs to the technical field of membrane separation. Background technique [0002] Acid gases such as CO 2 , SO 2 、H 2 S, etc., are the main air pollutants, and are also the main pollutants in the petroleum-based petrochemical industry. These components not only affect product quality, but also form acid, which seriously corrodes equipment and pipelines. Therefore, the enrichment and recovery of acid gas is an important topic in the field of resources and environment. Ionic liquid supported liquid membrane is a new green separation technology, which is composed of a porous polymer membrane support body filled with ionic liquid in the pores. It combines the dual advantages of membrane technology and ionic liquid. When used for acid gas separation, it not only has High thermal stability and chemical stability, also has the advantages of high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/26B01D71/36B01D71/34B01D69/10B01D67/00B01D53/22
CPCY02C20/40
Inventor 张春芳白云翔
Owner JIANGNAN UNIV
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