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Sulfonated polyphosphazene/polyetheretherketone proton exchange membrane material and preparation method thereof

A technology of sulfonated polyether ether ketone and sulfonated polyphosphazene, which is applied in the field of materials, can solve the problems of insufficient alcohol penetration coefficient, high water swelling rate, and low proton conductivity, and achieve low preparation cost and reduced swelling effect , the effect of high conductivity

Inactive Publication Date: 2017-01-04
EAST CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the SPEEK membrane with a high degree of sulfonation (DS>90%) has a higher proton conductivity, while the alcohol permeability coefficient and water swelling rate are higher, and even fail due to excessive swelling; while the SPEEK membrane with a low degree of sulfonation (DS<40%) ) SPEEK membrane has excellent alcohol resistance and water swelling resistance, but the proton conductivity is low, far inferior to Nafion membrane

Method used

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  • Sulfonated polyphosphazene/polyetheretherketone proton exchange membrane material and preparation method thereof
  • Sulfonated polyphosphazene/polyetheretherketone proton exchange membrane material and preparation method thereof
  • Sulfonated polyphosphazene/polyetheretherketone proton exchange membrane material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Dissolve (1.7000g, 0.0050mol) of SPEEK (sulfonation degree 65) in 30mL of DMAc solvent in a 100mL three-neck flask equipped with magnetic rotor stirring, condenser, and thermometer, turn on the magnetic stirring, and oil Heat the heating bath to 50°C to make a membrane-forming solution;

[0031] (2) Under the protection of nitrogen, add (0.1892g, 0.0050mol) NaBH at one time to the film-forming solution obtained in step (1) 4 , heated to 100°C for reflux reaction for 12 hours, centrifuged and purified to obtain the supernatant;

[0032] (3) Dissolve (0.1738g, 0.0005mol) hexachlorocyclotriphosphazene in DMAc solvent in a 500mL three-neck flask equipped with magnetic rotor stirring, condenser, and HCl absorption device, and add step (2) dropwise The resulting supernatant was stirred and reacted in an ice-water bath for 24 hours.

[0033] (4) In a 500mL three-necked flask equipped with magnetic rotor stirring, a condenser tube, and an HCl absorption device, under nitr...

Embodiment 2

[0058] (1) Dissolve (3.4000g, 0.0100mol) SPEEK (sulfonation degree 65) in 30mL of DMAc solvent in a 100mL three-necked flask equipped with magnetic rotor stirring, condenser, and thermometer, turn on the magnetic stirring, oil Heat the heating bath to 50°C to make a membrane-forming solution;

[0059] (2) Under the protection of nitrogen, add (0.3783 g, 0.0100 mol) NaBH to the film-forming solution obtained in step (1) at one time, heat up to 80° C. for reflux reaction for 20 hours, and centrifugally purify to obtain the supernatant;

[0060] (3) Dissolve (0.3477g, 0.0010mol) hexachlorocyclotriphosphazene in DMAc solvent in a 500mL three-neck flask equipped with magnetic rotor stirring, condenser, and HCl absorption device, and add step (2) dropwise The resulting supernatant was stirred and reacted in an ice-water bath for 24 hours.

[0061] (4) In a 500mL three-necked flask equipped with magnetic rotor stirring, a condenser tube, and an HCl absorption device, under nitrogen ...

Embodiment 3

[0071] (1) Dissolve (2.0400g, 0.0060mol) of SPEEK (sulfonation degree 65) in 30mL of DMAc solvent in a 100mL three-neck flask equipped with magnetic rotor stirring, condenser, and thermometer, turn on the magnetic stirring, oil Heat the heating bath to 50°C to make a membrane-forming solution;

[0072] (2) Under the protection of nitrogen, add (0.2270 g, 0.0060 mol) NaBH to the film-forming solution obtained in step (1) at one time, heat up to 120° C. for reflux reaction for 10 hours, and centrifugally purify to obtain the supernatant;

[0073] (3) Dissolve (0.3129g, 0.0009mol) hexachlorocyclotriphosphazene in DMAc solvent in a 500mL three-neck flask equipped with magnetic rotor stirring, condenser, and HCl absorption device, and add step (2) dropwise The resulting supernatant was stirred and reacted in an ice-water bath for 24 hours.

[0074] (4) In a 500mL three-neck flask equipped with magnetic rotor stirring, a condenser tube, and an HCl absorption device, under nitrogen ...

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Abstract

The invention relates to a sulfonated polyphosphazene / polyetheretherketone proton exchange membrane material and a preparation method thereof. The proton exchange membrane material takes moderately sulfonated polyetheretherketone as a base material to overcome defects of poor composite membrane stability and overhigh water absorption rate of highly sulfonated SPEEK (sulfonated polyetheretherketone), and mechanical strength and great alcohol inhibition performance of a composite membrane are guaranteed. Due to addition of a phosphonitrile three-membered ring structure, heat stability and oxidation resistance of a sulfonated polyetheretherketone membrane material are improved; due to addition of aromatic amino benzene rings as hydrophobic groups, alcohol inhibition performance is further improved, and water swelling effects are reduced; by addition of a great quantity of sulfonic acid groups through chemical bonds, proton conduction rate of the proton exchange membrane is increased, physical loss of the sulfonic acid groups is avoided, and the service life of the membrane is prolonged. The sulfonated polyphosphazene / polyetheretherketone proton exchange membrane material and the preparation method thereof have advantages of low preparation cost, high conductivity, great alcohol inhibition performance and high heat resistance.

Description

technical field [0001] The invention belongs to the technical field of materials, and relates to a sulfonated polyphosphazene / ether ether ketone proton exchange membrane material and a preparation method thereof. Background technique [0002] Proton exchange membrane (PEM), as the core component of direct methanol fuel cell (DMFC), has received extensive attention and has become the focus of research work. It mainly plays the role of isolating fuel and conducting protons. Its performance directly determines the performance of fuel cells develop. [0003] At present, the more successful PEM is the perfluorosulfonic acid membrane represented by Dupont's Nafion membrane. This membrane has good chemical stability and high electrical conductivity, but it also has some defects, such as high cost, The performance degradation at high temperature (above 100°C) and poor alcohol resistance in DMFC limit the further application of perfluorosulfonic acid membranes in fuel cells, and it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1041H01M8/1011
CPCH01M8/1011H01M8/1041Y02E60/50Y02P70/50
Inventor 刘妍赵正平朱业安
Owner EAST CHINA UNIV OF TECH
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