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Ionic liquid gel supporting film and preparation method thereof

A technology of ionic liquid and ionic gel, which is applied in the field of membrane separation, can solve the problems of easy leakage and poor stability of the supporting liquid membrane, and achieve the effects of avoiding liquid leakage, enhancing performance stability, and strong controllability

Inactive Publication Date: 2014-02-26
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, and provide a preparation method of supported ionic liquid gel membrane, which is used for acid gas separation in mixed gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method for a supported ionic liquid gel membrane is characterized in that the preparation steps are as follows, and its formula is in parts by mass:

[0019] (1) Preparation of gel precursor solution: 90 parts of 1-octyl-3-methylimidazolium hexafluorophosphate, 5 parts of 1-octyl-3-vinylimidazole hexafluorophosphate, 4 parts Mix one part of 1,6-hexanediol diacrylate and one part of 2-hydroxy-2-methyl-1-phenylacetone, and stir evenly to obtain a gel precursor solution;

[0020] (2) Infiltration process: vacuum degas the polyethersulfone membrane for 5 hours, then immerse it in the above-mentioned gel precursor solution, take it out after 5 hours, and take out the excess solution on the surface of the membrane with filter paper;

[0021] (3) Gel phase immobilization: send the polymer microporous membrane soaked with the gel precursor solution into an ultraviolet irradiation box, and irradiate it under an ultraviolet lamp for 1 minute, and the obtained ion ge...

Embodiment 2

[0024] A preparation method for a supported ionic liquid gel membrane is characterized in that the preparation steps are as follows, and its formula is in parts by mass:

[0025] (1) Preparation of gel precursor solution: 60 parts of 1-butyl-3-methylimidazolium tetrafluoroborate, 30 parts of 1-octyl-3-vinylimidazole hexafluorophosphate, 9 parts of 1,6-hexanediol diacrylate and 1 part of 1-hydroxycyclohexyl phenyl ketone were mixed and stirred evenly to obtain a gel precursor solution;

[0026] (2) Wetting process: vacuum degas the polyvinylidene fluoride membrane for 1 hour, then immerse it in the above-mentioned gel precursor solution, take it out after 10 hours, and take out the excess solution on the surface of the membrane with filter paper;

[0027] (3) Gel phase immobilization: send the polymer microporous membrane soaked with the gel precursor solution into an ultraviolet irradiation box, and irradiate it under the ultraviolet lamp for 30 minutes, and the obtained is th...

Embodiment 3

[0030] A preparation method of a supported ionic liquid gel membrane, characterized in that the preparation steps are as follows, and its formula is by mass fraction:

[0031] (1) Preparation of gel precursor solution: 80 parts of 1-ethyl-3-methylimidazole bistrifluoromethanesulfonimide salt, 10 parts of 1-octyl-3-vinylimidazole six Fluorophosphate, 9.9 parts of 1,6-hexanediol diacrylate, 0.1 part of 2-methyl-1-(4-methylthiophenyl)-2-morpholine-1-acetone were mixed, and stirred evenly to obtain Gel precursor solution;

[0032] (2) Infiltration process: The polypropylene membrane was vacuum degassed for 5 hours, then immersed in the above-mentioned gel precursor solution, taken out after 1 hour, and the excess solution on the surface of the membrane was taken out with filter paper;

[0033] (3) Gel phase immobilization: The polymer microporous membrane soaked with the gel precursor solution is sent into an ultraviolet irradiation box, and irradiated under an ultraviolet lamp f...

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Abstract

The invention relates to an ionic liquid gel supporting film and a preparation method thereof, belonging to the field of membrane separation techniques. The film is formed by loading ionic liquid gel on a macromolecule microporous membrane, and the mass of the ionic liquid gel accounts for 30-80% of the total mass of the ionic liquid gel supporting film. The preparation method of the film comprises the following steps: firstly, injecting a gel precursor solution into the macromolecule microporous membrane by adopting an impregnation method, and gelatinizing the gel precursor solution through ultraviolet light initiation to prepare the ionic liquid gel supporting film. The ionic liquid gel supporting film prepared by the method provided by the invention has relatively high gas permeation flux and relatively large gas separating factor, and can avoid the liquid leakage of the film under relatively high transmembrane pressure, enhance the performance stability of the film, and prolong the service life of the film. The method is simple and easy to control, the prepared ionic liquid gel supporting film is mainly used in the fields such as trapping of acid gas in industrial discharge exhaust gas, and CO2 separating in spacecrafts, submarines and other confined spaces.

Description

technical field [0001] The invention relates to a supported ionic liquid gel membrane and a preparation method thereof, belonging 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 selective...

Claims

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Application Information

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IPC IPC(8): B01D69/10B01D71/26B01D71/36B01D71/34B01D71/68B01D67/00
Inventor 白云翔张春芳
Owner JIANGNAN UNIV
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