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Enhancement type composite proton exchanging film based on semi-interpenetrating network

A proton exchange membrane and semi-interpenetrating network technology, applied in the field of enhanced composite proton exchange membrane and its preparation, can solve the problems of insufficient mechanical properties, expensive use, low dynamic life, etc.

Inactive Publication Date: 2009-02-18
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, it has good thermal stability, chemical stability and high proton conductivity, but there are also problems such as low mechanical strength and expensive use.
Compared with the previous non-fluorine membrane, the life of the film has been greatly improved, but its dynamic life is still low when used in electric vehicles, and the mechanical properties are still not enough. It is necessary to develop an enhanced composite PEM

Method used

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  • Enhancement type composite proton exchanging film based on semi-interpenetrating network

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The ratio of raw materials used is as follows:

[0050] 1 part of PBI-ph (number of moles of repeating units)

[0051] Resin 0.2 parts (number of moles of repeating units)

[0052] Sodium hydride 4 parts (moles)

[0053] 1 part of 4-chloromethylstyrene (moles)

[0054] 1 part of styrene (number of moles)

[0055] N, N-dimethylacetamide 500 parts (moles)

[0056] Azobisisobutyronitrile 0.8 part (moles)

[0057] Preparation method of composite membrane:

[0058] 1) Add 0.1g The resin was soaked in a sodium hydroxide solution with a mass concentration of 10% for 22 hours, then taken out and dried to constant weight, and then dissolved in 20ml of N,N-dimethylacetamide at 180°C to form a uniform solution.

[0059] 2) Dissolve 0.4g (1.3mmol) of PBI-ph in 20ml of N,N-dimethylacetamide at 160°C to form a brown homogeneous solution. Then, under the protection of nitrogen at 80°C, 5.2 mmol of sodium hydride was added to the PBI-ph solution, and the reaction was continu...

Embodiment 2

[0066] The ratio of raw materials used is as follows:

[0067] 1 part of PBI-ph (number of moles of repeating units)

[0068] Resin 0.8 parts (repeating unit moles)

[0069] Sodium hydride 4 parts (moles)

[0070] Chloromethylethylene 0.2 parts (moles)

[0071] 0.2 parts of divinylbenzene (number of moles)

[0072] 160 parts of N-methylpyrrolidone (moles)

[0073] Azobisisobutyronitrile 0.05 parts (moles)

[0074] Preparation method of composite membrane:

[0075] 1) Add 0.4g After soaking in 10% sodium hydroxide solution for 24 hours, take it out and dry it to constant weight, then dissolve it in 5ml N-methylpyrrolidone at 160°C to form a uniform solution.

[0076] 2) Dissolve 0.4g (1.3mmol) of PBI-ph in 5ml of N-methylpyrrolidone at 140°C to form a brown homogeneous solution. Then, at 80° C., under the protection of nitrogen, 5.2 mmol of sodium hydride was added to the PBI-ph solution, and the reaction was continuously stirred for 24 hours. Then, 0.41 mmol of chl...

Embodiment 3

[0082] The ratio of raw materials used is as follows:

[0083] 1 part of PBI-ph (number of moles of repeating units)

[0084] 9 parts of resin (number of moles of repeating units)

[0085] Sodium hydride 4 parts (moles)

[0086] 1 part of 4-chloromethyl styrene (number of moles)

[0087] Vinyl tetrazole 0.5 parts (moles)

[0088] 500 parts of N-methylpyrrolidone (moles)

[0089] 1 part of dibenzoyl peroxide (number of moles)

[0090] Preparation method of composite membrane:

[0091] 1) Add 2.25g After soaking in 10% sodium hydroxide solution for 24 hours, take it out and dry it to constant weight, then dissolve it in 22ml of N,N-dimethylacetamide at 160°C to form a uniform solution.

[0092] 2) Dissolve 0.2g (0.65mmol) of PBI-ph in 20ml of N,N-dimethylacetamide at 160°C to form a brown homogeneous solution. Then, at 80° C., under the protection of nitrogen, 2.6 mmol of sodium hydride was added to the PBI-ph solution, and the reaction was continuously stirred for 24...

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Abstract

The invention belongs to the technical field of functional high molecular materials and electrochemical electrochemistrytechniques, in particular to an enhanced compound proton exchange membrane based on the semi-interpenetrating net, and a preparation method thereof. The method comprises synthesizing the linear polybenzimidazole polymer containing crosslinkable groups, blending the linear polybenzimidazole polymer and perflurinated sulfonic acid resin, using the specific method to crosslink polybenzimidazole polymer during membrane forming process, and forming the compound membrane with the semi-interpenetrating net structure. , thus The the compound membrane is attached withhas good mechanical property and high proton conductivity. The method disclosed by the invention is characterized in by good preparation controllability. Compared with the traditional perflurinated sulfonic acid membrane, the enhanced compound proton exchange membrane based on the semi-interpenetrating net is characterized in by high mechanical strength and good size stability, and has a wide application future in polymer electrolyte membrane fuel cells.

Description

technical field [0001] The invention belongs to the technical field of functional polymer materials and electrochemistry, and specifically relates to an enhanced composite proton exchange membrane based on a semi-interpenetrating network and a preparation method thereof. Background technique [0002] As an energy device with high energy density and low environmental pollution, fuel cell is known as the fourth generation power generation device after hydropower, thermal power and nuclear power. Fuel cells can be divided into many types, and proton exchange membrane fuel cells (PEMFC), with its unique advantages, become the most adaptable type of fuel cells. PEMFC has great application potential in electric vehicles, portable devices, and aerospace power supplies. [0003] Perfluorosulfonic acid proton exchange membrane is a type of proton exchange membrane (PEM) developed earlier, among which the Dupont company in the United States launched it in the early 1970s. Perfluoro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F291/00C08J5/22C08L51/00H01M8/10
CPCY02E60/521Y02E60/50
Inventor 浦鸿汀管祎嗣常志宏潘海燕
Owner TONGJI UNIV
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