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Side chain type polyphenylene ether ketone/sulphone polymer membrane

A technology of polymer membrane and sulfonated poly(phenylene ether ketone) is applied in electrochemical generators, fuel cells, electrical components, etc., and can solve the problems of expensive preparation process, high degree of environmental pollution, limited sulfonic acid groups, etc. To achieve the effect of simple synthesis process, good chemical stability and high electrical conductivity

Inactive Publication Date: 2018-06-29
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although perfluorosulfonic acid membrane has many advantages as a commercial product, the expensive preparation process and high methanol permeability limit the promotion and application of Nafion membrane, and it contains fluorine elements that pollute the environment. High reliance on heavy metal catalysts, resulting in a significant increase in their cost
Sulfonated polyarylether sulfone has good thermal stability and good proton conductivity, but most of the sulfonated polyarylether sulfones are non-return copolymer systems, in order to control the conductivity at a higher level , it is necessary to improve the IEC, and the dimensional stability is challenged
[0004] The sulfonic acid groups of the traditional main chain type sulfonated polyarylether polymers are limited by the main chain of the polymer, and it is difficult to form a remarkable hydrophilic and hydrophobic microphase separation structure like Nafion membrane.

Method used

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  • Side chain type polyphenylene ether ketone/sulphone polymer membrane
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  • Side chain type polyphenylene ether ketone/sulphone polymer membrane

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1: Preparation of side chain type sulfonated poly(phenylene ether ketone / sulfone) of IEC=1.8meq / g

[0036] In a three-necked flask, add 4,4-difluorobenzophenone (1.200g), methoxyhydroquinone (0.631g), hexafluorobisphenol A (0.336g), potassium carbonate (6.080g), DMAc (10.8mL), toluene (10.0mL), heated in an oil bath at 140°C for 2h, then heated to 160°C for 6h, filtered the product to obtain a taupe polymer, moved it to a beaker with a straw, added methanol (300mL ), HCl (10mL), stirred at room temperature for one day, filtered, and rinsed with methanol to obtain a gray powder, which was dried in a vacuum oven at 80°C to obtain product A. Take the solid A (1.0g) of the first step reaction in a three-necked flask, add dichloromethane (20mL), evacuate with a vacuum pump until there is no air, and add boron tribromide (6.0mL) with a dropper. After 8 hours of reaction, a red powder was obtained. The product was transferred to a beaker, 300mL of water was added,...

Embodiment 2

[0037] Embodiment 2: Preparation of side chain type sulfonated poly(phenylene ether ketone / sulfone) of IEC=1.8meq / g

[0038] Add 4,4-difluorobenzophenone (1.200g), 3-methoxy-4,4-dihydroxybenzophenone (1.108g) and hexafluorobisphenol A (0.336g) into a three-necked flask , potassium carbonate (6.080g), DMAc (13.2mL), toluene (13.0mL), heated in an oil bath at 140°C for 2h, then heated to 160°C for 6h, filtered the product to obtain a beige polymer, and used a pipette Move to a beaker, add methanol (300mL), HCl (10mL), stir at room temperature for one day, filter and rinse with methanol to obtain a gray powder, dry in a vacuum oven at 80°C to obtain product A. Take the solid A (1.562g) of the first step reaction in a three-necked flask, add dichloromethane (20mL), evacuate with a vacuum pump until there is no air, add boron tribromide (6.0mL) with a dropper, and put it in an ice bath. After 8 hours of reaction, a red powder was obtained. The product was transferred to a beaker,...

Embodiment 3

[0039] Embodiment 3: Preparation of side chain type sulfonated poly(phenylene ether ketone / sulfone) with IEC=2.0meq / g

[0040] Add 4,4-difluorodiphenyl sulfone (1.474g), 3-methoxy-4,4-dihydroxybenzophenone (1.171g), hexafluorobisphenol A (0.336g) in a three-necked flask, Potassium carbonate (6.271g), DMAc (14.9mL), toluene (14.0mL), heated in an oil bath at 140°C for 2h, then heated to 160°C for 6h, filtered the product to obtain a taupe polymer, and pipetted Add methanol (300mL) and HCl (10mL) to a beaker, stir at room temperature for one day, filter and rinse with methanol to obtain a gray powder, dry in a vacuum oven at 80°C to obtain product A. Take the solid A (1.875g) of the first step reaction in a three-necked flask, add dichloromethane (20mL), evacuate with a vacuum pump until there is no air, add boron tribromide (6.0mL) with a dropper, and place in an ice bath. After 8 hours of reaction, a red powder was obtained. The product was transferred to a beaker, 300mL of ...

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Abstract

The invention discloses a side chain type polyphenylene ether ketone / sulphone polymer membrane and a synthesis method thereof, and belongs to the field of oxyhydrogen and methanol fuel batteries. Thesynthesis method comprises the following steps: (1) performing nuclephilic condensation reaction on a macromolecular polymer; (2) performing demethylation reaction to generate a phenolic hydroxy typepolymer; (3) performing sulphonation reaction and introducing a side chain type sulphonic acid group. A proton exchange membrane prepared according to the method has the characteristics of high mechanical strength and chemical stability, simple synthesis process, stable sulphonation degree, excellent fuel battery properties and the like.

Description

technical field [0001] The invention belongs to the field of fuel cell membrane materials, in particular to a side chain type sulfonated polyphenylene ether ketone / sulfone polymer membrane and a synthesis method thereof. Background technique [0002] Energy shortage and environmental pollution have become increasingly concerned issues in the world. With the increasing demand for energy, the energy shortage problem needs to be solved urgently. Fuel cells can convert chemical energy into thermal energy, which is a clean energy source with application prospects. As a key component of fuel cell, proton exchange membrane directly affects the performance of fuel cell, and its development is of key significance. Sulfonated proton exchange membranes are widely used in fuel cells, chlor-alkali industry, membrane separation technology and aerospace technology. [0003] DuPont's Nafion membrane is widely used at present. Although perfluorosulfonic acid membrane has many advantages a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G75/23H01M8/1027
CPCC08G75/23H01M8/1027Y02E60/50
Inventor 何斌吴聪聪李欣泽张轩
Owner NANJING UNIV OF SCI & TECH