Carbon dioxide separating membrane having both primary amine and carbonate and preparation method thereof

A carbonate, primary amine-based technology, applied in separation methods, chemical instruments and methods, semi-permeable membrane separation, etc., can solve the problems of limited effect of functional carriers, and achieve the effect of simple, easy and low-cost membrane production methods

Active Publication Date: 2015-08-26
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the efficiency of the functional carrier can be improved to a certain extent through appropriate structural optimization modification, the above-mentioned CO 2 Separation-promoted transfer membranes contain only a single type of functional carrier, and the shortcomings of these functional carriers when used alone are still difficult to effectively avoid, resulting in limited effects of improving the efficiency of functional carriers

Method used

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  • Carbon dioxide separating membrane having both primary amine and carbonate and preparation method thereof
  • Carbon dioxide separating membrane having both primary amine and carbonate and preparation method thereof
  • Carbon dioxide separating membrane having both primary amine and carbonate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 8.0g N-vinylformamide and 2.0g diallyldimethylammonium chloride to 40g deionized water, stir evenly to prepare a monomer solution with a mass fraction of 20%, and then add azo to the solution Diisobutyramidine hydrochloride. After thorough stirring, the solution was transferred to a flask equipped with a condenser, and the polymerization was carried out under nitrogen protection. After the polymerization reaction was completed, hydrochloric acid solution was added to the reaction system, and the hydrolysis reaction was carried out under nitrogen protection. The solution obtained by the hydrolysis reaction was added to ethanol, and the precipitated product was dissolved in deionized water and stirred thoroughly. Add strong basic anion exchange resin to the solution, carry out suction filtration treatment after fully stirring, and add ammonium carbonate to the solution obtained by suction filtration. After thorough stirring, dialysis treatment is performed, and the ...

Embodiment 2

[0028] Take 2.0g of N-vinylformamide and 8.0g of diallyldimethylammonium chloride and add it to 40g of deionized water, stir evenly to prepare a monomer solution with a mass fraction of 20%, and then add azobis to the solution. isobutyramidine hydrochloride. After thorough stirring, the solution was transferred to a flask equipped with a condenser, and the polymerization was carried out under nitrogen protection. After the polymerization reaction was completed, hydrochloric acid solution was added to the reaction system, and the hydrolysis reaction was carried out under nitrogen protection. The solution obtained by the hydrolysis reaction was added to ethanol, and the precipitated product was dissolved in deionized water and stirred thoroughly. Add strong basic anion exchange resin to the solution, carry out suction filtration treatment after fully stirring, and add ammonium carbonate to the solution obtained by suction filtration. After thorough stirring, dialysis treatment...

Embodiment 3

[0032] Take 6.0g of N-vinylformamide and 3.0g of diallyldimethylammonium chloride and add it to 36g of deionized water, stir evenly to prepare a monomer solution with a mass fraction of 20%, and then add azobis to the solution. isobutyramidine hydrochloride. After thorough stirring, the solution was transferred to a flask equipped with a condenser, and the polymerization was carried out under nitrogen protection. After the polymerization reaction was completed, hydrochloric acid solution was added to the reaction system, and the hydrolysis reaction was carried out under nitrogen protection. The solution obtained by the hydrolysis reaction was added to ethanol, and the precipitated product was dissolved in deionized water and stirred thoroughly. Add strong basic anion exchange resin to the solution, carry out suction filtration treatment after fully stirring, and add ammonium carbonate to the solution obtained by suction filtration. After thorough stirring, dialysis treatment...

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Abstract

The invention relates to a carbon dioxide separating membrane having both primary amine and carbonate and a preparation method thereof; the method comprises the steps of preparing the polymer blends of poly (vinyl amine-diallyl dimethyl ammonium carbonate) copolymer and polyvinyl amine or poly diallyl dimethyl ammonium carbonate; taking polysulfone ultrafiltration membrane as a supporting body, dissolving the polymer blends into deionized water, and defoaming to obtain coating solution after stirring; under the condition of a certain temperature and relative humidity, carrying out drying treatment for a period of time to obtain the CO2 separating membrane having both the primary amine and the carbonate. The carbon dioxide separating membrane having both the primary amine and the carbonate realizes the synergic coupling effect between different function carriers: not only is the efficiency of the function carriers strengthened, but also the defects of various function carriers are avoided when the carriers are used alone. The carbon dioxide separating membrane having both the primary amine and the carbonate has excellent CO2 permeation selection performance: with regard to the mixed gas of CO2 / N2, under the condition that the feed pressure force is 0.11-2.00 MPa, the permeation rate of the CO2 is (137-1842)*10-6, and the CO2 / N2 separation factors are 23-160.

Description

technical field [0001] The invention relates to a poly(vinylamine-diallyldimethylammonium carbonate) copolymer and a polyvinylamine / polydiallyldimethylammonium carbonate blend as a material with both primary amine groups and Carbonate CO 2 A separation membrane and a preparation method thereof belong to the technical field of gas separation membranes. Background technique [0002] Facilitated transport membrane is a class of CO with great potential for application 2 separation membrane. Since the membrane contains CO 2 Reversible functional carrier to enhance CO 2 transport, thus facilitating transport membranes can simultaneously have high CO 2 Permeability and selectivity, overcoming the trade-off effect between permeability and selectivity common to common polymer membranes. Currently, for CO 2 The functional carriers contained in the separation-promoting transfer membrane mainly include amine groups, carboxylate groups, carbonate groups, and fluoride ions. Each o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D67/00B01D53/22
CPCY02C20/40
Inventor 王志李潘源廖家友王纪孝王世昌
Owner TIANJIN UNIV
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