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Side-chain sulfonated polysulfone/ polyvinyl alcohol proton exchange membrane and preparation method thereof

A technology of proton exchange membrane and sulfonated polysulfone, which is applied in the field of exchange membrane, can solve the problems such as the decrease of proton conductivity, and achieve the effects of improving chemical stability, low preparation cost and improving proton conductivity

Active Publication Date: 2019-06-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to further improve the oxidation stability and alcohol inhibition rate of the proton exchange membrane, a common cross-linking method is to cross-link the sulfonate groups on the main chain. This cross-linking method is based on the premise of sacrificing the sulfonate groups on the main chain. As a result, the proton conductivity of the membrane decreases

Method used

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  • Side-chain sulfonated polysulfone/ polyvinyl alcohol proton exchange membrane and preparation method thereof
  • Side-chain sulfonated polysulfone/ polyvinyl alcohol proton exchange membrane and preparation method thereof
  • Side-chain sulfonated polysulfone/ polyvinyl alcohol proton exchange membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Preparation of polyvinyl alcohol solution

[0031] Take 100 parts of PVA and dissolve it in dimethyl sulfoxide at 90°C to prepare a solution with a mass fraction of 10%.

[0032] 2) Preparation of chloromethylated polysulfone

[0033] Dissolve 10 parts of purchased Solvay Adv Polymers Udel P-1700 polysulfone in 190 parts of 1,2-dichloroethane at 60°C, add 1 part of zinc powder, 6 parts of trifluoroacetic acid and 4 parts of chloromethyl methyl ether , react at 30°C for 6h, continue to add solvent to dilute to 2% solid content after the reaction is completed, pour the diluted solution into 400 parts of methanol for precipitation, and the obtained precipitate is vacuum-dried at 60-80°C after repeated washing to obtain Chloromethylated polysulfone solid.

[0034] Its structural formula is as follows:

[0035]

[0036] 3) Preparation of polysulfone grafted bisphenol

[0037] Take 100 parts of chloromethylated polysulfone and dissolve it in dimethyl sulfoxide at 90°C...

Embodiment 2

[0050] In step (5), the mass ratio of side-chain sulfonated polysulfone / polyvinyl alcohol is 8:2, and the rest are the same as in Example 1. The proton conductivity of the proton exchange membrane is 19mS / cm, and the methanol permeability is 15×10 -6 cm 2 / min.

Embodiment 3

[0052] In step (5), the mass ratio of side-chain sulfonated polysulfone / polyvinyl alcohol is 7:3, and the rest are the same as in Example 1. The proton conductivity of the proton exchange membrane is 18mS / cm, and the methanol permeability is 3×10 -6 cm 2 / min.

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Abstract

The invention discloses a side-chain sulfonated polysulfone / polyvinyl alcohol proton exchange membrane and a preparation method thereof. The proton exchange membrane is formed in a way that side-chain sulfonated polysulfone solution and polyvinyl alcohol solution are blended to carry out casting to form a membrane and then the membrane is subjected to crosslinking, wherein the mass ratio of the side-chain sulfonated polysulfone to the polyvinyl alcohol is 50:50-90:10. By use of the proton exchange membrane, the side-chain sulfonated polysulfone solution and polyvinyl alcohol solution are blended to form the membrane on a glass plate, the membrane is dried in vacuum, and the dried membrane is dipped in sulfuric acid aqueous solution containing methyl aldehyde or glutaraldehyde to be subjected to crosslinking to obtain the blended crosslinking proton exchange membrane. The proton exchange membrane has the advantages of high proton conductivity, low methyl alcohol permeability, wide material source, simple preparation instrument and low preparation cost.

Description

technical field [0001] The invention belongs to the technical field of exchange membranes, in particular to a side chain type sulfonated polysulfone / polyvinyl alcohol proton exchange membrane and a preparation method thereof. Background technique [0002] A fuel cell is a device that converts chemical energy in fuel and oxidant into electrical energy through a chemical reaction. It is fully compatible with other renewable energy sources (such as solar energy and wind energy), and has the advantages of high energy conversion rate and environmental friendliness. Proton exchange membrane fuel cell (PEMFC) has attracted much attention because of its excellent electrical performance at low temperature, and its modular design allows it to be used as an energy source in various occasions, such as portable electronic products, electric vehicles, home power Wait. The proton exchange membrane is the core component of the proton exchange fuel cell, and its performance directly affects...

Claims

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Application Information

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IPC IPC(8): H01M8/1041H01M8/1069H01M8/1072H01M8/1011H01M8/18
CPCY02E60/50
Inventor 汪映寒张欣欣夏一帆
Owner SICHUAN UNIV
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