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Side group-modified oxygen-free polymer anion exchange membrane and preparation method thereof

An anion-exchange membrane and polymer technology, which is applied in the field of side group-modified oxygen-free polymer anion-exchange membrane and its preparation, can solve the problem that the ion conductivity and stability of the alkaline ion-exchange membrane cannot be taken into account, and achieve solvent selection Wide range, simple and fast response operation, and performance-enhancing effect

Active Publication Date: 2019-01-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the current problem that the ion conductivity and stability of the alkaline ion exchange membrane cannot be taken into account, the research and modification of the membrane is still a difficult problem to be overcome.

Method used

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  • Side group-modified oxygen-free polymer anion exchange membrane and preparation method thereof
  • Side group-modified oxygen-free polymer anion exchange membrane and preparation method thereof
  • Side group-modified oxygen-free polymer anion exchange membrane and preparation method thereof

Examples

Experimental program
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Embodiment 1

[0041] Synthesis of amine-containing oxygen-free polymer: under ice-water bath conditions, 2.7516g (12mmol) of m-terphenyl, 1.7652g (15.6mmol) of N-methyl-4-piperidone, 12.75mL (144mmol) of triphenyl Add fluoromethanesulfonic acid into a 50mL three-necked flask, and then add 18mL of dichloromethane to make a mixed solution. After mechanical stirring for 30min, gradually raise the temperature to room temperature, and keep it at room temperature for 30h. After the reaction, the product was completely dissolved in DMSO solution with tweezers, and then precipitated with 0.5M NaOH solution to obtain a white powdery polymer. The product was repeatedly washed and soaked with deionized water and then dried to obtain a polymer for use.

[0042] Synthesis of 1-(4-bromobutyl)-1-methyl-4-piperidinium bromide salt ionic liquid: Dissolve 5mL 1,4-dibromobutane in 20mL ethyl acetate with a 50mL one-necked flask, add 2.82g of N-methylpiperidine was reacted at 60°C for 48h to obtain a precipita...

Embodiment 2

[0048] Synthesis of amino-containing oxygen-free polymer: under ice-water bath conditions, 2.7516g (12mmol) m-terphenyl, 1.7652g (15.6mmol) of N-methyl-4-piperidone, 12.75mL (144mmol) of trifluoro Add methanesulfonic acid into a 50mL three-necked flask, and then add 18mL of dichloromethane to make a mixed solution. After mechanical stirring for 30min, the temperature is gradually raised to room temperature and kept at room temperature for 30h. After the reaction, the product was completely dissolved in DMSO solution with tweezers, and then precipitated with 0.5M NaOH solution to obtain a white powdery polymer. The product was repeatedly washed and soaked with deionized water and then dried to obtain a polymer for use.

[0049] Synthesis of 1-(6-bromohexyl)-1-methyl-4-piperidinium bromide salt ionic liquid: Dissolve 5mL 1,6-dibromohexane in 20mL ethyl acetate with a 50mL one-necked flask, add 2.82 g N-methylpiperidine, reacted at 60°C for 48h, and obtained the precipitated prod...

Embodiment 3

[0055] Synthesis of amino-containing oxygen-free polymer: same as Example 2

[0056] Synthesis of 1-bromohexyl-1-methylpyrrolidine bromide salt ionic liquid: Dissolve 5mL of 1,6-dibromohexane in 15mL of ethyl acetate in a 50mL one-necked flask, add 1.754g of N-methylpyrrolidine, After reacting at 60°C for 24h, a precipitated product in the form of milky white powder was obtained. The product was repeatedly washed with ethyl acetate for 3 to 5 times, and vacuum-dried at 60° C. for 12 hours to obtain a milky white powdery ionic liquid.

[0057] Preparation of hexane-branched pyrrolidine functionalized polymer anion-exchange membrane without ether oxygen bond: under nitrogen protection, weigh 0.5 g of amino-substituted polymer without ether oxygen bond and add it to a 50 mL three-necked flask, dissolve it with 10 mL DMSO, and wait for polymerization After the substance was fully dissolved, 0.7592g of 1-bromohexyl-1-methylpyrrolidine bromide in DMSO solution was added, and the re...

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Abstract

The invention discloses a side group-modified oxygen-free polymer anion exchange membrane and a preparation method thereof, belonging to the technical field of basic anion exchange membranes. According to the invention, an ether-free oxygen bond polymer with good solubility and stability is synthesized at first, then the polymer is subjected to functional grafting with the amine group of the polymer as a grafting site so as to obtain a membrane material, and finally, the membrane is prepared. The prepared membrane has good alkali stability and high ionic conductivity and can be applied to an alkaline polymer electrolytic cell.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a side group modified oxygen-free polymer anion exchange membrane and a preparation method thereof. Background technique [0002] As the global demand for clean and efficient energy continues to grow, hydrogen has attracted widespread attention from all over the world because of its green, stable, high specific energy, and its ability to be used as a carrier of clean energy. Alkaline electrolytic cell is a kind of hydrogen production technology by electrolysis of water. Compared with acidic electrolytic cell, alkaline electrolytic cell does not need to use noble metal catalysts (such as Pt / C, IrO2, etc.), and has the advantages of large-scale production. become a current research hotspot. [0003] Membrane is a key component in alkaline electrolytic cells, and its performance largely determines the performance of the battery. Its functions mainly include: i...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08G61/02H01M8/1018H01M8/1081C08L65/00
CPCC08G61/02C08G2261/122C08G2261/143C08G2261/19C08G2261/312C08G2261/332C08J5/2256C08J2365/00H01M8/1018H01M8/1081Y02E60/50
Inventor 焉晓明苏祥东贺高红张文君阮雪华代岩
Owner DALIAN UNIV OF TECH
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