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Sulfonated polyetheretherketone proton exchange membrane as well as preparation method and application thereof

A sulfonated polyether ether ketone and proton exchange membrane technology, applied in the field of proton exchange membrane, can solve the problems of excessive swelling, poor mechanical properties and structural stability, and high water absorption, so as to reduce swelling, improve mechanical properties, and improve water retention. performance effect

Active Publication Date: 2022-08-09
佛山市清极能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a sulfonated polyetheretherketone-based proton exchange membrane and its preparation method and application, aiming at improving the proton conductivity level of SPEEK and solving the problem of water absorption of existing SPEEK membranes. High, easy to cause excessive swelling of the membrane, resulting in poor mechanical properties and structural stability of the membrane

Method used

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  • Sulfonated polyetheretherketone proton exchange membrane as well as preparation method and application thereof
  • Sulfonated polyetheretherketone proton exchange membrane as well as preparation method and application thereof
  • Sulfonated polyetheretherketone proton exchange membrane as well as preparation method and application thereof

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Effect test

Embodiment 1

[0045] A preparation method of a proton exchange membrane, comprising the following steps:

[0046] 1) Sulfonation of polyether ether ketone

[0047] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45°C, and the reaction was carried out under vigorous stirring for 36 hours. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH of the polymer was 7; the final product (SPEEK) was placed in an oven at 105°C Dry to constant weight.

[0048] 2) Preparation of silica particles

[0049] Silica particles were prepared using the Störber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and aqueous ammonia solution (6 mL). The solution was stirred and reacted at room temperature for 12...

Embodiment 2

[0056] A preparation method of a proton exchange membrane, comprising the following steps:

[0057] 1) Sulfonation of polyether ether ketone

[0058] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45 °C, and the reaction was carried out under vigorous stirring for 8 h. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH of the polymer was 7; the final product (SPEEK) was placed in an oven at 105°C Dry to constant weight.

[0059] 2) Preparation of silica particles

[0060] Silica particles were prepared using the Störber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and aqueous ammonia solution (6 mL). The solution was stirred and reacted at room temperature for 6 h. A...

Embodiment 3

[0067] A preparation method of a proton exchange membrane, comprising the following steps:

[0068] 1) Sulfonation of polyether ether ketone

[0069] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45 °C, and the reaction was carried out under vigorous stirring for 72 h. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH of the polymer was 7.5; the final product (SPEEK) was placed in an oven at 105°C Dry to constant weight.

[0070] 2) Preparation of silica particles

[0071] Silica particles were prepared using the Störber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and aqueous ammonia solution (6 mL). The solution was stirred at room temperature for 24 h. After the...

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Abstract

The invention discloses a sulfonated polyetheretherketone proton exchange membrane and a preparation method and application thereof, and the preparation method comprises the following steps: firstly, preparing silicon dioxide particles by using a Strber method; 2-bromoisobutyryl bromide and Si-OH on the surfaces of the SiO2 particles are subjected to a nucleophilic substitution reaction, and silicon dioxide particles with the tail ends functionalized by bromine functional groups are obtained and marked as SiO2-Br; then initiating 1-vinyl imidazole containing an imidazole group on the surface of the SiO2-Br to generate a polymerization reaction, so as to prepare a silicon dioxide particle of which the surface is coated with a polymer containing an imidazole functional group, and recording the silicon dioxide particle as SiO2 (at) Poly; and finally, adding SiO2-coated Poly into the SPEEK solution, mixing, casting on the surface of glass, and drying and curing to obtain the proton exchange membrane. According to the proton exchange membrane, the membrane stability of the SPEEK membrane under the condition of high sulfonation degree is improved, and the swelling effect of the membrane is reduced.

Description

technical field [0001] The invention relates to the technical field of proton exchange membranes, in particular to a sulfonated polyether ether ketone-based proton exchange membrane and a preparation method and application thereof. Background technique [0002] Polymer electrolyte membranes are one of the key steps in proton exchange membrane fuel cells (PEMFCs), and perfluorosulfonic acid membranes (PFSAs) such as Nafion are considered the most suitable proton exchange membranes due to their high proton conductivity and stability. . However, its high cost, performance loss at higher temperature (above 80 °C) or low humidity (below 80% RH), high fuel crossover, etc., have affected the large-scale commercialization of PEMFC to some extent. [0003] Sulfonated polyetheretherketone (SPEEK) is a promising alternative to PFSA due to its low cost, high proton conductivity, and high thermal stability. The proton conductivity of SPEEK strongly depends on the degree of sulfonation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1069H01M8/1025H01M8/1048H01M8/1051H01M8/1086C08J5/22C08L61/16C08K9/10C08K9/04C08K3/36
CPCH01M8/1069H01M8/1086H01M8/1051H01M8/1048H01M8/1025C08J5/2256H01M2008/1095C08J2361/16C08K9/10C08K9/04C08K3/36Y02P70/50
Inventor 钱伟易荣黄静
Owner 佛山市清极能源科技有限公司
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