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Polysulfone/polyvinyl alcohol composite anion exchange membrane and preparation method thereof

A technology of compound anion and polyvinyl alcohol, which is applied in the preparation of the polysulfone/polyvinyl alcohol compound anion exchange membrane, and the field of polysulfone/polyvinyl alcohol compound anion exchange membrane, can solve the problems of dimensional stability and poor alkali resistance, etc.

Active Publication Date: 2021-07-06
SHAANXI TECHN INST OF DEFENSE IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a polysulfone / polyvinyl alcohol composite anion exchange membrane, which solves the problems of poor dimensional stability and alkali resistance of traditional CEM under high proton conductivity

Method used

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  • Polysulfone/polyvinyl alcohol composite anion exchange membrane and preparation method thereof
  • Polysulfone/polyvinyl alcohol composite anion exchange membrane and preparation method thereof
  • Polysulfone/polyvinyl alcohol composite anion exchange membrane and preparation method thereof

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preparation example Construction

[0035] A kind of preparation method of polysulfone / polyvinyl alcohol composite anion exchange membrane of the present invention, concrete steps are as follows:

[0036] Step 1: Prepare chloromethylated polysulfone (CPSF), the specific steps are as follows:

[0037] Dissolve PSF in dichloromethane, add catalyst SnCl after it dissolves 4 At the same time, drop the chloromethylation reagent 1,4-dichloromethoxybutane with a dropping funnel, react at 40-60°C for 24-40h, and then add 2-4mol / L of dilute hydrochloric acid, and then add a precipitant to precipitate the product, leave it to stand, separate, wash, and dry to obtain chloromethylated polysulfone (CPSF);

[0038] Among them, the mass ratio of polysulfone, methylene chloride, 1,4-dichloromethoxybutane and tin tetrachloride is: 1:47:1.9:0.58;

[0039] The precipitant is any one or more of absolute ethanol, methanol, and isopropanol;

[0040] Among them, the preparation method of 1,4-dichloromethoxybutane is as follows: mix...

Embodiment 1

[0062] A kind of preparation method of polysulfone / polyvinyl alcohol composite anion exchange membrane of the present invention, concrete steps are as follows:

[0063] Step 1: Prepare chloromethylated polysulfone (CPSF), the specific steps are as follows:

[0064] Dissolve PSF in dichloromethane, add catalyst SnCl after it dissolves 4 At the same time, use a dropping funnel to drop the chloromethylation reagent 1,4-dichloromethoxybutane, react at 40-60°C for 24h, then add 2mol / L dilute hydrochloric acid to the reaction mixture, and then Adding a precipitant to precipitate the product, standing, separating, washing, and drying to obtain chloromethylated polysulfone (CPSF);

[0065] Among them, the mass ratio of polysulfone, methylene chloride, 1,4-dichloromethoxybutane and tin tetrachloride is: 1:47:1.9:0.58;

[0066] Precipitating agent is absolute ethanol;

[0067] Step 2: Prepare modified polysulfone (CPSF-BA) with aldehyde groups at the end of the side chain; specifical...

Embodiment 2

[0077] A kind of preparation method of polysulfone / polyvinyl alcohol composite anion exchange membrane of the present invention, concrete steps are as follows:

[0078] Step 1: Prepare chloromethylated polysulfone (CPSF), the specific steps are as follows:

[0079] Dissolve PSF in dichloromethane, add catalyst SnCl after it dissolves 4 At the same time, use a dropping funnel to drop the chloromethylation reagent 1,4-dichloromethoxybutane, react at 50°C for 32h, then add 3mol / L dilute hydrochloric acid to the reaction mixture, and then add the precipitate The product is precipitated by the agent, left standing, separated, washed and dried to obtain chloromethylated polysulfone (CPSF);

[0080] Among them, the mass ratio of polysulfone, methylene chloride, 1,4-dichloromethoxybutane and tin tetrachloride is: 1:47:1.9:0.58; the precipitation agent is methanol;

[0081] Step 2: Prepare modified polysulfone (CPSF-BA) with aldehyde groups at the end of the side chain; specifically:...

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Abstract

The invention discloses a polysulfone / polyvinyl alcohol composite anion exchange membrane and a preparation method thereof. The preparation method specifically comprises the steps of firstly, dissolving PSF in dichloromethane, adding SnCl4 and 1, 4-dichloromethoxybutane for a reaction, and obtaining chloromethylated polysulfone; dissolving the chloromethylated polysulfone in DMSO, and adding 4-(imidazole-1-yl) benzaldehyde for reaction to obtain modified polysulfone; and dissolving polyvinyl alcohol in dimethyl sulfoxide, adding modified polysulfone and concentrated sulfuric acid, reacting, drying, demolding, soaking and washing. According to the polysulfone / polyvinyl alcohol composite anion exchange membrane prepared by the method disclosed by the invention, the hydrophilicity of a composite membrane material is improved by the strong hydrophilicity of polyvinyl alcohol, the proton conductivity of the composite membrane is improved, and meanwhile, a compact cross-linked network structure is formed through chemical cross-linking, hydroxyl can be effectively prevented from entering the membrane, and free radicals can be effectively prevented from entering the membrane for corrosion.

Description

technical field [0001] The invention belongs to the technical field of preparation of fuel cell anion exchange membranes, in particular to a polysulfone / polyvinyl alcohol composite anion exchange membrane, and also to a preparation method of the polysulfone / polyvinyl alcohol composite anion exchange membrane. Background technique [0002] Fuel cell is an energy conversion device that converts fuel and oxidant with high efficiency. Compared with lithium battery, it has the advantages of high energy density, small size and long battery life. It has been used in aerospace, portable power supply, small mobile power supply and other fields. It has achieved practical application and has a good development prospect. As the earliest practical fuel cell, anion exchange membrane fuel cells (CEMFCs) can use non-noble metals as catalysts, and have fast electrode reaction speed, strong CO tolerance, and low catalyst cost. The low advantages have aroused widespread concern of scientists. ...

Claims

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Application Information

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IPC IPC(8): H01M8/1027H01M8/1032H01M8/1041H01M8/1067H01M8/1072C08J5/22C08L81/06C08L29/04
CPCH01M8/1041H01M8/1067H01M8/1027H01M8/1032H01M8/1072C08J5/2287C08J5/2256C08J5/2231C08J2381/06C08J2429/04Y02P70/50
Inventor 乔宗文
Owner SHAANXI TECHN INST OF DEFENSE IND
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