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A kind of sulfonated polybenzylpyrrole proton exchange membrane and preparation method thereof

A technology for sulfonated polybenzyl pyrrole and sulfonated benzyl pyrrole, which is applied in the fields of polymer chemistry and proton exchange membrane fuel cells, can solve the problems of unfavorable long-term stable application and high membrane swelling rate, and achieves lower methanol permeability coefficient and higher Proton conductivity, the effect of improving proton transfer efficiency

Active Publication Date: 2021-07-13
承德石油高等专科学校
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  • Application Information

AI Technical Summary

Problems solved by technology

At present, in order to improve the energy conversion efficiency, it is often necessary to increase the degree of sulfonation of the proton exchange membrane, and most proton exchange membranes have a high swelling rate when the degree of sulfonation is high, which is not conducive to their long-term stable application.

Method used

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  • A kind of sulfonated polybenzylpyrrole proton exchange membrane and preparation method thereof
  • A kind of sulfonated polybenzylpyrrole proton exchange membrane and preparation method thereof
  • A kind of sulfonated polybenzylpyrrole proton exchange membrane and preparation method thereof

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preparation example Construction

[0024] The present invention also provides a method for preparing a sulfonated polybenzylpyrrole proton exchange membrane, the method comprising:

[0025] Step 1: Add 1-benzylpyrrole and 98% concentrated sulfuric acid into the three-necked flask, N 2 Under protection, heat the reaction temperature to 80°C-120°C, preferably 110°C, and continue to stir for 5-17 hours, preferably 10h. After the reaction is completed, let it stand at room temperature, add deionized water and sodium hydroxide, and adjust the pH value to 5 to 8, preferably 7, then add sodium chloride for salting out, filter, wash, and dry to obtain sulfonated benzylpyrrole; the mass g of the 1-benzylpyrrole: the volume mL of concentrated sulfuric acid is preferably 20: (10-30), more preferably 20:20, the reaction process is as follows:

[0026]

[0027] Step 2: Add acetonitrile and deionized water into a three-necked flask respectively, then add the sulfonated benzylpyrrole obtained in Step 1, control the reacti...

Embodiment 1

[0035] Embodiment 1: the preparation of sulfonated benzylpyrrole

[0036] Add 20.0g of 1-benzylpyrrole and 30ml of 98% concentrated sulfuric acid into a three-necked flask, and pass through N 2 , the temperature was raised to 90°C, refluxed for 10 hours, cooled to room temperature, added 100ml of deionized water, added 25.0g of sodium hydroxide, adjusted to pH 7, added 30.0g of sodium chloride for salting out, filtered, washed and dried to obtain Sulfonated benzylpyrrole.

Embodiment 2

[0037] Embodiment 2: the preparation of sulfonated benzylpyrrole

[0038] Add 20.0g of 1-benzylpyrrole and 30ml of 98% concentrated sulfuric acid into a three-necked flask, and pass through N 2 , the temperature was raised to 100°C, refluxed for 10 hours, cooled to room temperature, added 100ml of deionized water, added 25.0g of sodium hydroxide, adjusted to pH 7, added 30.0g of sodium chloride for salting out, filtered, washed and dried to obtain Sulfonated benzylpyrrole.

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Abstract

The invention provides a sulfonated polybenzylpyrrole proton exchange membrane and a preparation method thereof, belonging to the fields of polymer chemistry and proton exchange membrane fuel cells. The structural formula of the sulfonated polybenzylpyrrole proton exchange membrane is shown in formula II. The present invention also provides a method for preparing sulfonated polybenzylpyrrole proton exchange membrane. The method uses chemical oxidation polymerization to prepare sulfonated polybenzylpyrrole. The preparation method has simple process, warm reaction conditions, low cost and It has good repeatability and has broad application prospects in the field of fuel cells.

Description

technical field [0001] The invention belongs to the fields of polymer chemistry and proton exchange membrane fuel cells, and in particular relates to a sulfonated polybenzylpyrrole proton exchange membrane and a preparation method thereof. Background technique [0002] In recent years, proton exchange membrane fuel cells have played a vital role in energy. Due to their high energy conversion efficiency and zero pollution emissions, they may be applied to aerospace, automobiles, home appliances, military and other fields in the future. As the core component of the fuel cell, the proton exchange membrane plays a dual role of transferring protons from one side of the membrane to the other and blocking the fuel. It can be seen that the performance of the proton exchange membrane plays a key role in the fuel cell, and its quality directly affects the use of the fuel cell. At present, in order to improve the energy conversion efficiency, it is often necessary to increase the degr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/1032H01M8/103H01M8/1072C08G61/12
CPCC08G61/124C08G2261/11C08G2261/1452C08G2261/3221C08G2261/43C08G2261/516H01M8/103H01M8/1032H01M8/1072Y02E60/50
Inventor 高洪成
Owner 承德石油高等专科学校