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Preparation method of pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as base

A technology of benzimidazole imide membrane and proton exchange membrane is applied in the fields of functional polymer materials and electrochemistry, which can solve problems such as poor resistance to free radical oxidation, improve mechanical strength and poor dimensional stability, and improve fuel permeability. The effect of high, excellent thermal stability

Inactive Publication Date: 2015-05-20
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its resistance to free radical oxidation is worse than perfluorosulfonic acid membrane

Method used

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  • Preparation method of pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as base
  • Preparation method of pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as base
  • Preparation method of pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The CPIBI-20- 50-Nafion preparation.

[0022] (1) The preparation process of polybenzimidazole imide PIBI is as follows. Add 3mmol (0.6796g, 99%) 2-(4-aminophenyl)-5aminobenzimidazole (APBIA ) and 10mL of N-methylpyrrolidone (NMP), connect the gas inlet, drying tube, gas outlet, reflux condenser and mechanical stirrer, feed inert gas and start stirring, when APBIA is completely dissolved, add 3mmol (1.3599g , 98%) 4,4'-hexafluoroisopropylidene-phthalic anhydride (6FDA) and 0.78mL of catalyst isoquinoline, after the reactants are completely dissolved, heat up to 80°C and keep the temperature for 4h , then raise the temperature to 215°C to reflux the solvent NMP, and react for 20 hours. After the reaction, cool down to about 100°C. Drying in an oven at 60°C to obtain polybenzimidazole imide PIBI;

[0023] (2) The preparation process of the cross-linked polybenzimidazole imide film substrate CPIBI-20-50 is as follows. Weigh 0.3g of PIBI obtained in (1), dissolve it in 1...

Embodiment 2

[0026] The CPIBI-40- 50-Nafion preparation.

[0027] (1) The preparation process of polybenzimidazole imide PIBI is the same as step (1) in Example 1;

[0028] (2) The preparation process of the cross-linked polybenzimidazole imide film substrate CPIBI-40-50, except that the mass of TMBP was changed to 0.034g, other steps and the type and quality of the reagents added were the same as those in Example 1 Step (2) is the same;

[0029] (3) The preparation process of Nafion pore-filling membrane, except that the basement membrane was changed to CPIBI-40-50, other steps and the types and quality of reagents added were the same as step (3) in Example 1.

Embodiment 3

[0031] The CPIBI-60- 50-Nafion preparation.

[0032] (1) The preparation process of polybenzimidazole imide PIBI is the same as step (1) in Example 1;

[0033] (2) In the preparation process of the cross-linked polybenzimidazolium imide film substrate CPIBI-60-50, except that the mass of TMBP was changed to 0.051g, other steps and the types and qualities of reagents added were the same as in Example 1 Step (2) is the same;

[0034] (3) The preparation process of Nafion pore-filling membrane, except that the basement membrane was changed to CPIBI-60-50, other steps and the types and quality of reagents added were the same as step (3) in Example 1.

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Abstract

The invention belongs to the technical fields of functional polymer materials and electrochemistry and in particular relates to a preparation method of a pore-filing type proton exchange membrane taking double ether crosslinked porous polybenzimidazole imide as a base. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base comprises the following steps: firstly synthesizing polybenzimidazole imide provided with a cross-linkable imidazole group on a main chain, preparing the synthesized polybenzimidazole imide into a membrane solution, adding a double ether crosslinking agent, reacting with the imidazole group, a crosslinking sulfonated polyimide polymer in a membrane forming process, adding a pore-forming agent at the same time to form a crosslinked porous polybenzimidazole imide membrane, and finally compounding the crosslinked porous polybenzimidazole imide membrane with perfluorosulfonate resin, so that the pore-filling type proton exchange membrane is obtained. A basement membrane gives good mechanical properties to the pore-filling type membrane, and the pore-filling type membrane has high dimensional stability; meanwhile, the proton conductivity of a perfluorosulfonate membrane is not greatly reduced. The preparation method of the pore-filing type proton exchange membrane taking the double ether crosslinked porous polybenzimidazole imide as the base has the advantages that the preparation technology controllability is good; and compared with the traditional perfluorosulfonate membrane, the obtained pore-filling type proton exchange membrane has high mechanical strength and good dimensional stability and has broad application prospect in a polymer electrolyte membrane fuel cell.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials and electrochemistry, and in particular relates to a method for preparing a pore-filling proton exchange membrane based on bis-ether cross-linked porous polybenzimidazole imide. Background technique [0002] Proton exchange membrane fuel cells (PEMFCs) are fuel cells with proton exchange membranes as electrolytes, and are one of the five types of fuel cells. It is currently the most mature technology in the world that can chemically react hydrogen with oxygen in the air to generate water and release electricity. It has the advantages of high energy efficiency, low emissions and environmental friendliness. As the core of a fuel cell, the properties of the electrolyte are directly related to key performances such as power generation efficiency and service life of the fuel cell. The proton conductivity, mechanical properties, and dimensional stability of proton exchange membrane...

Claims

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Application Information

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IPC IPC(8): C08J9/42C08J9/26C08J5/22C08J3/24C08L79/08C08G73/10H01M8/10
CPCY02E60/50
Inventor 潘海燕陈世雄
Owner TONGJI UNIV
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