Interpenetrated reticular proton exchange membrane, forming method thereof and proton exchange membrane fuel cell

A technology of proton exchange membrane and network, which is applied in the composition field of improving the dimensional stability of proton exchange membrane to achieve the effect of improving physical properties, optimal glass transition temperature and dimensional stability

Active Publication Date: 2010-12-29
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it has been proved by experiments that the above-mentioned blends cannot effectively solve the problem of excessive dimensional change of the film after heating.

Method used

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  • Interpenetrated reticular proton exchange membrane, forming method thereof and proton exchange membrane fuel cell
  • Interpenetrated reticular proton exchange membrane, forming method thereof and proton exchange membrane fuel cell
  • Interpenetrated reticular proton exchange membrane, forming method thereof and proton exchange membrane fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Get the polymaleimide of 16.967g formula 1 (BMI2300, purchased from KAIWAKSEI, it is the mixture of polymaleimide, wherein n=0 accounts for 60mole%, n=1 accounts for 23mole%, n=2 accounts for 10mole %, n=3 accounts for 7 mole%) and barbituric acid (purchased from ALDRICH) in a molar ratio of 2:1, after adding the solvent γ-butyrolactone (γ-butyrolactone, GBL), heated to 105 ° C after the reaction After 5 hours, the reaction produces super-branched polymers. Measure the above-mentioned super-branched polymer with gel permeation liquid chromatography (GPC), and its spectrum is as follows figure 1 shown. The residence time of the highly branched polymer is about 26 to 40 minutes, the number average molecular weight (Mn) is 10204, the weight average molecular weight is 29981, and the polymerization distribution index (Mw / Mn) is 2.93.

[0044] (Formula 1)

[0045] Next, take 30 g of Nafion aqueous solution (DE2020CS purchased from DuPont), add 18 g of DMAc solution, hea...

Embodiment 2

[0049] Get 16.967g polymaleimide of formula 1 (BMI2300, purchased from KAIWAKSEI, its composition is the same as embodiment 1) and barbituric acid (purchased from ALDRICH) and mix with molar ratio 2: 1, add solvent γ-butyl Lactone (γ-butyrolactone, GBL) was heated to 115°C and reacted for 5 hours to form a super branched polymer. Measure the above-mentioned super-branched polymer with gel permeation liquid chromatography (GPC), and its spectrum is as follows figure 1 shown. The residence time of the highly branched polymer is about 26 to 40 minutes, the number average molecular weight (Mn) is 16419, the weight average molecular weight is 67208, and the polymerization distribution index (Mw / Mn) is 4.09.

[0050] (Formula 1)

[0051] Next, take 30 g of Nafion aqueous solution (DE2020CS purchased from DuPont), add 18 g of DMAc solution, heat at 60° C., and replace the water and alcohols in the Nafion aqueous solution with DMAc.

[0052] After adding the above super branched ...

Embodiment 3

[0055] Get 16.967g polymaleimide of formula 1 (BMI2300, purchased from KAIWAKSEI, its composition is the same as embodiment 1) and barbituric acid (purchased from ALDRICH) and mix with molar ratio 2: 1, add solvent γ-butyl Lactone (γ-butyrolactone, GBL) was heated to 125°C and reacted for 5 hours to form a super-branched polymer. Measure the above-mentioned super-branched polymer with gel permeation liquid chromatography (GPC), and its spectrum is as follows figure 1 shown. The residence time of the highly branched polymer is about 26 to 40 minutes, the number average molecular weight (Mn) is 15602, the weight average molecular weight is 65689, and the polymerization distribution index (Mw / Mn) is 4.18.

[0056] (Formula 1)

[0057] Next, take 30 g of Nafion aqueous solution (DE2020CS purchased from DuPont), add 18 g of DMAc solution, heat at 60° C., and replace the water and alcohols in the Nafion aqueous solution with DMAc.

[0058] After adding the above super branched ...

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Abstract

The invention relates to an interpenetrated reticular proton exchange membrane and a forming method thereof. The method comprises the following steps of: copolymerizing polymaleimide and barbituric acid to form super-branched macromolecules; replacing the solvent of a sulfonated tetrafluoethyl copolymer aqueous solution into dimethyl ethylamine; adding 10-20 parts by weight of the super-branched macromolecules to 90-80 parts by weight of the sulfonated tetrafluoethyl copolymer aqueous solution, standing still and heating up to 50 DEG C to ensure that the super-branched macromolecules and the sulfonated tetrafluoethyl copolymers are mutually penetrated; and coating the heated solution onto a substrate, drying and then carrying out pretreatment to remove the dimethyl ethylamine so as to form an interpenetrated reticular proton exchange membrane. The invention also relates to a proton exchange membrane fuel cell using the interpenetrated reticular proton exchange membrane.

Description

technical field [0001] The invention relates to a proton exchange membrane, more particularly to a composition and a method for improving the dimensional stability of the proton exchange membrane. Background technique [0002] (sulfonated tetrafluoroethylene copolymer, sulfonated tetrafluoroethyl copolymer) is a conductive polymer developed by Dupont in the 1960s. Due to their ionic properties, such compounds are also known as ionomers. The unique ionic properties of Nafion come from the sulfonic acid group grafted at the end of the PTFE backbone. Due to its excellent thermal stability and mechanical properties, Nafion occupies a place in the field of proton exchange membrane fuel cells (PEMFC). [0003] The proton on the sulfonic acid group of Nafion can be transferred from one sulfonic acid group to another sulfonic acid group to complete the proton exchange. On the contrary, electrons and anions cannot carry out the above-mentioned transfer. [0004] Although Nafion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/02H01M2/16H01M8/10C08J5/22C08L27/22C08L79/08H01M8/1041H01M8/1072
CPCY02E60/521Y02E60/50
Inventor 潘金平林月微张中良蔡丽端徐雅亭
Owner IND TECH RES INST
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