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High-strength alkaline anionic polymer cross-linked membrane and preparation method thereof

A basic anion and polymer technology, applied in the field of materials, can solve the problem of high cost of perfluorosulfonic acid membranes, achieve excellent dimensional stability, high mechanical strength, and improve mechanical strength

Active Publication Date: 2021-05-07
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strongly acidic condition of this type of fuel cell can only rely on noble metals such as Pt as a catalyst, and the perfluorosulfonic acid membrane as a diaphragm material is expensive, which has always been an important factor restricting the development of this type of fuel cell.

Method used

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  • High-strength alkaline anionic polymer cross-linked membrane and preparation method thereof
  • High-strength alkaline anionic polymer cross-linked membrane and preparation method thereof
  • High-strength alkaline anionic polymer cross-linked membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Weigh 41.0 mmol of biphenyl into a 150 mL three-necked flask, add 42.0 mmol of 1-methyl-4-piperidone, and add 8.6 mL of dichloromethane to dissolve the reactant. Under the condition of an ice-water bath, 32 mL of a mixed acid of trifluoromethanesulfonic acid and trifluoroacetic acid was added, the volume ratio of the two was 15:1, and the mixture was reacted for 3 hours. The product was precipitated in potassium carbonate solution, washed thoroughly with deionized water, and dried in an oven at 60-80°C for 24 hours. The starting polymer raw material PPP is obtained.

[0067] Weigh 10.0mmol of the above-mentioned polymer and add it into 1-methyl-2-pyrrolidone to dissolve it to prepare a polymer solution with a mass fraction of 33.3-66.7mg / mL, add 0.5 equivalent of methyl iodide and react at 40-60°C After 2-4 hours, a quaternized polymer with a reaction efficiency of 30%-50% is obtained. After the reaction was completed, it was precipitated in diethyl ether to obtain a ...

Embodiment 2

[0075] According to the method of Example 1, the initial polymer raw material PPT was synthesized by replacing biphenyl with p-terphenyl.

[0076] Weigh 10.0mmol of the above-mentioned polymer and add it to 1-methyl-2-pyrrolidone to dissolve it to prepare a polymer solution with a mass fraction of 33.3-66.7mg / mL, add 1 times the equivalent of methyl iodide and react at 40-60°C After 2-4 hours, a quaternized polymer with a reaction efficiency of 30%-50% is obtained. After the reaction was completed, it was precipitated in diethyl ether to obtain a yellow powdery solid, which was washed repeatedly with diethyl ether. The partially quaternized ionic polymer QAPPT is obtained, which is the aryl piperidine copolymer A.

[0077] Weigh 10.0mmol of the above-mentioned ionic polymer QAPPT (aryl piperidine copolymer A), add dimethyl sulfoxide to dissolve, make a polymer solution with a mass fraction of 33.3-66.7 mg / mL, add 5-7 times the equivalent of dibromo Hexane (the first alkylati...

Embodiment 3

[0083] According to the method of Example 1, the initial polymer raw material POB was synthesized by replacing biphenyl with ether ketone ether.

[0084] Weigh 10.0mmol of the above-mentioned polymer and add it into 1-methyl-2-pyrrolidone to dissolve it to form a polymer solution with a mass fraction of 33.3-66.7mg / mL, add 1.2 times the equivalent of methyl iodide and react at 40-60°C After 2-4 hours, a quaternized polymer with a reaction efficiency of 30%-50% is obtained. After the reaction was completed, it was precipitated in ether to obtain a white powdery solid, which was washed repeatedly with ether. The partially quaternized ionic polymer QAPOB is obtained, which is the aryl piperidine copolymer A.

[0085] Weigh 10.0mmol of the above-mentioned ionic polymer QAPOB, add dimethyl sulfoxide to dissolve, and make a polymer solution with a mass fraction of 33.3-66.7mg / mL, add 5-7 times the equivalent of dibromohexane at 40-60°C After reacting for 8 to 10 hours, pour the re...

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Abstract

The invention discloses a high-strength alkaline anionic polymer cross-linked membrane and a preparation method thereof. The preparation method comprises the following steps: firstly, synthesizing polymers with different functional group side chains; respectively dissolving the obtained modified polymer in an organic solvent to prepare a membrane solution with a certain concentration; and finally, fully mixing the two membrane solutions under a normal temperature condition to obtain a uniform mixed membrane solution, and placing the uniform mixed membrane solution under a proper high-temperature condition to perform thermal crosslinking membrane formation so as to obtain the high-strength alkaline anionic polymer crosslinked membrane. The alkaline anionic polymer membrane with high mechanical strength is obtained by adopting an indirect cross-linking method, and the alkaline anionic polymer cross-linked membrane obtained by adopting an indirect chemical cross-linking method has high mechanical strength and excellent dimensional stability. The alkaline anionic polymer cross-linked membrane has excellent physical and chemical properties, so that the alkaline anionic polymer cross-linked membrane has good cell performance when being applied to an alkaline polymer membrane fuel cell.

Description

technical field [0001] The invention belongs to the field of materials, and relates to a preparation technology of an ion polymer membrane, in particular to a preparation method of a high-strength basic anion polymer cross-linked membrane. Background technique [0002] The 21st century is the century of energy. How to use energy efficiently and greenly is an important topic of sustainable development. As the fourth generation of power generation after thermal power, hydropower and nuclear power, fuel cell is an important way of energy utilization. Known as a clean and efficient power source in the 21st century, it has attracted widespread attention, and fuel cell technology has also developed rapidly in recent years. Proton exchange membrane fuel cell technology has been commercialized and applied to vehicle power systems. An endless stream of fuel cell vehicles and buses have gradually entered the public's field of vision. However, the strongly acidic conditions of this...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/22C08J3/24C08L65/00H01M8/103H01M8/1067H01M8/1072
CPCC08J3/246C08J5/2256C08J2365/00H01M8/103H01M8/1067H01M8/1072Y02E60/50
Inventor 庄林胡梅雪彭汉青
Owner WUHAN UNIV
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