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Sulfonated polyether ether ketone capable of being used as crosslinking proton exchange membrane material and purpose thereof

A technology of sulfonated polyether ether ketone and proton exchange membrane, which is applied to fuel cell components, fuel cells, electrochemical generators, etc., and can solve the problems of difficult large-scale preparation, many steps, and high cost

Active Publication Date: 2016-11-16
杭州中科氢能科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these methods all need to start from the monomer to modify specific functional groups, then undergo polycondensation, and use the specific functional groups to carry out chemical crosslinking. There are many steps and high cost, and it is difficult to prepare on a large scale.

Method used

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  • Sulfonated polyether ether ketone capable of being used as crosslinking proton exchange membrane material and purpose thereof
  • Sulfonated polyether ether ketone capable of being used as crosslinking proton exchange membrane material and purpose thereof
  • Sulfonated polyether ether ketone capable of being used as crosslinking proton exchange membrane material and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (1) Dissolve 10.00g of sulfonated polyetheretherketone (60% sulfonation degree) in 100mL of DMSO, add 1.46g of CDI, react at 50°C for 2h, then add 1.23g of N,N-dimethyl-p-phenylenediamine , after reacting at 50°C for 3 hours, sink the polymer into water, filter with suction, collect the filter cake, wash with water, and dry to obtain tertiary aminated sulfonated polyetheretherketone with a grafting rate of 50%;

[0072] (2) Dissolve 8.00 g of the above-mentioned tertiary aminated sulfonated polyetheretherketone in 100 mL of DMSO, add 0.06 g of α,α’-dichloroxylene and stir at 25°C for 2 hours to obtain a casting solution;

[0073] (3) Cast the above casting solution on a glass plate, bake in a blast oven at 60°C for 8 hours, and finally place it in a vacuum oven at 120°C for heat treatment for 12 hours to obtain protons with a degree of crosslinking (covalent) of 10%. exchange membrane, the synthetic route is as follows figure 1 Shown, where x=0.6, n 1 =0.27, n 2 = 0....

Embodiment 2

[0075](1) Dissolve 10.00g of sulfonated polyether ether ketone (40% sulfonation degree) in 100mL DMSO, add 1.01g of CDI, react at 50°C for 2h, then add 0.64g of N,N-dimethyl-1,3 -Propylenediamine, after reacting at 50°C for 3 hours, sink the polymer into water, filter with suction, collect the filter cake, wash with water, and dry to obtain tertiary aminated sulfonated polyetheretherketone with a grafting rate of 47%;

[0076] (2) Dissolve 8.00 g of the above-mentioned tertiary aminated sulfonated polyetheretherketone in 100 mL of DMSO, add 0.24 g of α,α’-dibromoxylene, stir at 25° C. for 2 h to obtain a casting solution;

[0077] (3) Cast the above-mentioned casting solution on a glass plate, bake in a blast oven at 60°C for 8 hours, and finally place it in a vacuum oven at 110°C for heat treatment for 12 hours to obtain a proton exchange membrane with a crosslinking degree of 40%. Infrared spectrum test shows that the polymer structure obtained in this embodiment contains ca...

Embodiment 3

[0079] (1) Dissolve 10.00g of sulfonated polyether ether ketone (sulfonation degree 60%) in 100mL DMSO, add 1.46g of CDI, react at 50°C for 2h, then add 1.05g of N,N-dimethyl-1,4 -Butanediamine, after reacting at 50°C for 3 hours, sink the polymer into water, filter with suction, collect the filter cake, wash with water, and dry to obtain tertiary aminated sulfonated polyetheretherketone with a grafting rate of 42%;

[0080] (2) Dissolve 8.00 g of the above-mentioned tertiary aminated sulfonated polyetheretherketone in 100 mL of DMSO, add 0.44 g of α,α’-dibromoxylene, stir at 25° C. for 2 h to obtain a casting solution;

[0081] (3) Cast the above casting solution on a glass plate, bake in a blast oven at 60°C for 8 hours, and finally place it in a vacuum oven at 100°C for heat treatment for 12 hours to obtain a proton exchange membrane with a crosslinking degree of 60%. Infrared spectrum test shows that the polymer structure obtained in this embodiment contains carbonyl, meth...

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Abstract

The invention relates to the field of a macromolecular membrane material, in particular to a polymer capable of being used as a crosslinking proton exchange membrane material, and a preparation method and a purpose thereof. The invention provides the polymer, wherein the polymer is sulfonated polyether ether ketone grafted by crosslinking tertiary amine functional groups. The crosslinking proton exchange membrane has low methanol and vanadium ion seeping performance, excellent oxidation stability and high proton conductivity. The preparation method provided by the invention can improve the integral performance of the sulfonated polyether ether ketone resin; in addition, the prepared crosslinking proton exchange membrane cannot generate phenomena of cracking, deformation or stripping in the membrane electrode preparation processing process, so that the stability of a direct methanol fuel battery and an all vanadium flow battery can be ensured.

Description

technical field [0001] The invention relates to the field of polymer membrane materials, in particular to a polymer that can be used as a cross-linked proton exchange membrane material and its preparation method and application. Background technique [0002] Proton exchange membrane is the key material of direct methanol fuel cell (DMFC) and vanadium redox flow battery (VRB), which plays the role of blocking fuel and conducting protons. Currently commercially available diaphragms are perfluorosulfonic acid proton exchange membranes, such as the Nafion series from Chemours, etc. This type of membrane has the advantages of high proton conductivity, excellent chemical stability and dimensional stability. However, the high price of Nafion membrane, low working temperature, high ion permeability and environmental pollution problems caused by the preparation of fluorine-containing materials limit its wide application. [0003] Aiming at the above-mentioned problems of perfluorosu...

Claims

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Application Information

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IPC IPC(8): C08G8/28C08J5/22H01M8/02C08L61/16
CPCC08G8/28C08J5/2256C08J2361/16H01M8/0239Y02E60/50
Inventor 钱汇东徐建峰李盼乐舟莹邹志青杨辉
Owner 杭州中科氢能科技有限公司
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