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Preparation method of mixed matrix membrane using porous ionic polymer as dispersion phase and application thereof to gas separation

An ionic polymer, mixed matrix membrane technology, applied in separation methods, semi-permeable membrane separation, dispersed particle separation, etc., can solve the problems of performance degradation, poor compatibility, complicated operation, etc., achieve excellent compatibility, easy to control , the effect of simple operation

Active Publication Date: 2020-02-07
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN 108939928A uses sodalite nanocrystals as the dispersed phase to prepare a mixed matrix membrane, and the continuous phase is polyetherimide, polyimide, polyethersulfone, polyethylene glycol diacrylate, cellulose acetate, polyvinyl alcohol , polyvinylidene fluoride, polydimethylsiloxane and polyaniline, a membrane with high hydrogen flux and selectivity was obtained, but the compatibility between the sodalite inorganic dispersed phase and the polymer organic continuous phase was poor, and the two Pore ​​defects without separation performance are easy to occur between the phases, which reduces the performance of the membrane
CN 101959577A mentions a polymer functionalized molecular sieve / polymer mixed matrix membrane through UV crosslinking, in which polymer functionalized molecular sieves are incorporated into a continuous UV crosslinkable polymer matrix, and for carbon dioxide / methane and Hydrogen / methane separation exhibits significantly enhanced selectivity and permeability but is complex to operate
In summary, the additive particles used as the dispersed phase must have both compatibility with the polymer membrane substrate and excellent separation selectivity. At present, there are very limited reports on high-efficiency mixed matrix membranes. For the actual target mixture, the development of high-efficiency separation performance New mixed-matrix membranes hold great promise

Method used

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  • Preparation method of mixed matrix membrane using porous ionic polymer as dispersion phase and application thereof to gas separation
  • Preparation method of mixed matrix membrane using porous ionic polymer as dispersion phase and application thereof to gas separation
  • Preparation method of mixed matrix membrane using porous ionic polymer as dispersion phase and application thereof to gas separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] A kind of preparation method of the porous ionic polymer that chlorine ion is anion, pyridyl is cation, comprises the following steps:

[0045]

[0046] Put 2.54g triptycene (compound represented by formula VI), 18g 1,2'-dichloroethane, 3.44g dimethoxymethane into a three-necked flask, stir until all solids are dissolved, and then dissolve 6.9g anhydrous Ferric trichloride was added into the flask and reacted for 24 hours at a temperature of 80°C. After the reaction, the product was cooled, suction filtered, and washed with methanol to obtain a porous organic polymer, abbreviated as POP.

[0047] Put 0.60g of the prepared porous organic polymer POP, 2.0g of paraformaldehyde, 30mL of hydrochloric acid, 9mL of acetic acid, and 4.5mL of phosphoric acid into a 350mL thick-walled pressure-resistant bottle, react at a temperature of 90°C for 72h, and suction filter after cooling , collect the solid, wash with water until neutral, and the obtained chloromethylated porous o...

Embodiment 2

[0051] A kind of preparation method that chloride ion is anion, imidazolyl group is cationic porous ionic polymer, comprises the following steps:

[0052]

[0053] Put 0.30 g of the chloromethylated porous organic polymer POP-Cl prepared in Example 1, 0.074 g of 1-methylimidazole, and 3 mL of toluene in a 50 mL round-bottomed flask, and react for 24 hours at a temperature of 90 ° C. After cooling, The solid was collected by suction filtration, washed with methanol, and the obtained solid was the porous ionic polymer PIP-MIM-Cl. Porous ionic polymer PIP-MIM-Cl is a solid nanoporous structure with a pore size of 1.5nm and a specific surface area (BET) of 718m 2 / g.

Embodiment 3

[0055] A kind of acetate ion is the preparation method of the porous ionic polymer that anion pyridyl is cation, comprises the following steps:

[0056]

[0057] Disperse 0.05 g of the porous ionic polymer PIP-Py-Cl prepared in Example 1 in 5 mL of water, then add 1 g of sodium acetate, stir at room temperature for 24 h, filter with suction, collect the solid, and wash the solid with water to obtain the porous ionic polymer PIP-Py -Ac. The porous ionic polymer PIP-Py-Ac is a solid nanoporous structure with a pore size of 1.6nm and a specific surface area (BET) of 773m 2 / g.

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PUM

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Abstract

The invention discloses a preparation method of a mixed matrix membrane using porous ionic polymer as a dispersion phase. The preparation method comprises the following steps of: ball-milling the porous ionic polymer into nanoparticles; adding the nanoparticles as the dispersion phase into a polymer matrix membrane material, wherein a mass fraction of the porous ionic polymer in the mixed matrix membrane is 5 to 20%; carrying out ultrasonic defoaming; coating the obtained product on a substrate; standing; and evaporating a solvent to obtain the mixed matrix membrane. The porous ionic polymer has the following structure: (with the reference to the specification), wherein X+ represents (with the reference to the specification), and Y- represents Cl-, Br-, CH3COO-, HCO3-, HSO4-, BF4-, PF6- and Tf2N-. According to the preparation method, the porous ionic polymer is used as the dispersion phase and added into the polymer matrix membrane material to prepare the mixed matrix membrane. The mixed matrix membrane prepared by the preparation method has an obvious effect on gas separation, can effectively separate carbon dioxide and is simple to operate.

Description

technical field [0001] The invention belongs to the technical field of environmental functional materials, and in particular relates to a method for preparing a mixed matrix membrane using a porous ion polymer as a dispersed phase and its application to gas separation. Background technique [0002] With the development of science and technology, gas separation has become an extremely important separation process in industrial production and environmental protection. Traditional gas separation technologies such as physical absorption, chemical adsorption, and cryogenic condensation are often accompanied by disadvantages such as high energy consumption, high pollution, and high cost. Membrane separation has the characteristics of low energy consumption, low pollution, simple equipment, and safety. Therefore, gas membrane separation technology is developing rapidly, and the key is to develop high-performance membrane materials. [0003] Gas separation membrane materials can be...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/44C08G61/02B01D69/14B01D67/00B01D53/22
CPCB01D53/228B01D67/0011B01D69/141B01D71/44C08G61/02C08G2261/314C08G2261/72Y02C20/20Y02P20/151Y02C20/40
Inventor 胡军王臣辉王艺蒙潘冯弘康刘洪来
Owner EAST CHINA UNIV OF SCI & TECH