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A trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof

An ion exchange membrane, functionalized technology

Active Publication Date: 2018-12-11
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although HEMs with these structures have good electrical conductivity, they usually have poor thermoalkali stability due to the benzyl group being easily attacked by hydroxyl groups.
The choice of the main chain of the hydroxide ion exchange membrane also has a great impact on the mechanical properties and life of the membrane. Commercial polysulfone and polyphenylene ether have the disadvantage of chain degradation caused by the attack of the ether oxygen bond by the hydroxide group.

Method used

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  • A trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof
  • A trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof
  • A trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0046] Preparation of trimethylamine-fu...

Embodiment 2

[0051]Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0052] Preparation of trimethylamine-fun...

Embodiment 3

[0057] Synthesis of polyarylindole polymer: under the protection of inert gas, 5.25g 2,3-indoledione and 5.42g biphenyl were dissolved in 6mL methylene chloride and 11mL trifluoroacetic acid, after completely dissolving, the The reaction was placed in an ice-bath environment, 25 mL of trifluoromethanesulfonic acid was slowly added, and then the temperature was gradually raised to room temperature for about 0.5 to 2 hours. When the reaction turned into a highly viscous liquid, the reaction ended, and it was poured into methanol to obtain a blocky white solid, soaked for about 12 hours, filtered and dried to obtain a crude product. Dissolve the crude product in about 120mL of NMP, pour it into methanol after completely dissolving to obtain a white fibrous solid, soak for 24 hours, filter, wash with methanol for more than three times, and dry at 60°C for 24 hours in a vacuum environment to obtain the purified polyarylene Indole polymers.

[0058] Preparation of trimethylamine-fu...

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Abstract

The invention discloses a trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof, belonging to the technical field of basic anion exchange membrane. Theinvention synthesizes aromatic amide group polyarylindole polymer with good stability and mechanical properties, and further combines the polymer and1, 2-graft copolymerization are subjected to reaction with hydrophobic chain / ether oxygen chainso as to graft with trimethylamine functional groups. The prepared membranes have good alkaline stability and mechanical properties and can be used in alkaline fuel cells.

Description

technical field [0001] The invention belongs to the technical field of basic anion exchange membranes, and relates to a trimethylamine functionalized polyarylindole anion exchange membrane and a preparation method thereof. Background technique [0002] With the growing global demand for clean and efficient energy, fuel cells are receiving increasing attention as an environmentally friendly power source and an alternative to traditional fossil fuel processes. Hydroxide exchange membrane fuel cells (HEMFCs) are a new type of clean and efficient energy technology that has attracted international attention. Operating in a basic environment, HEMFCs have several advantages over proton exchange membrane fuel cells (PEMFCs), namely enhanced fuel oxidation and redox kinetics, availability of non-noble metal catalysts (such as silver and nickel), and good catalyst stability sex. Therefore, HEMFCs have the potential to achieve low cost and long durability necessary for large-scale co...

Claims

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Application Information

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IPC IPC(8): H01M8/103H01M8/1072H01M8/1086
CPCH01M8/103H01M8/1072H01M8/1086Y02E60/50
Inventor 焉晓明王凯锋贺高红代岩郑文姬阮雪华潘昱
Owner DALIAN UNIV OF TECH
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