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A kind of bicyclic ammonium ion polybenzimidazole and anion exchange membrane and its preparation method and application

A technology of polybenzimidazole and ammonium ions, applied in electrochemical generators, fuel cells, electrical components, etc., can solve the problems of low ion conductivity and poor alkali resistance stability, and achieve high ion conductivity, Good film-forming properties, high film toughness and high alkali resistance stability

Active Publication Date: 2020-08-14
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Aiming at the problems of low ion conductivity and poor alkali resistance stability in the current basic anion resin and its ion exchange membrane, the present invention provides a bicyclic ammonium bicyclic ammonium resin with good mechanical properties, high alkali resistance and good dimensional stability. Ionic polybenzimidazole and its anion exchange membrane and preparation method

Method used

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  • A kind of bicyclic ammonium ion polybenzimidazole and anion exchange membrane and its preparation method and application
  • A kind of bicyclic ammonium ion polybenzimidazole and anion exchange membrane and its preparation method and application
  • A kind of bicyclic ammonium ion polybenzimidazole and anion exchange membrane and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0067] Add polyphosphoric acid in a stirred reactor, under N 2 Under protection, add biphenyltetramine, succinic acid and biphenyldiacid (the total number of moles of succinic acid and biphenyltetramine is equal to the number of moles of biphenyltetramine), heat and stir to dissolve, so that the total monomer mass concentration is 10wt%. Raise the temperature to 110°C and stir for 1 hour, 130°C for 1 hour, then raise the temperature to 170°C for 8 hours, until the viscosity of the system no longer increases. After the polymerization is completed, the product is poured into a large amount of deionized water, and excess NaHCO is added 3 , stirred overnight. Filter and wash the polymer with deionized water until neutral. The product is dried to obtain polybenzimidazole.

[0068] Add methylpiperazine and dibromopentane in equimolar ratio to acetone, raise the temperature to 30°C and stir for 15h. After the reaction was completed, the product N was obtained by filtration. Add...

Embodiment 2

[0073] Add polyphosphoric acid in a stirred reactor, under N 2 Under protection, add biphenyltetramine, succinic acid and biphenyldiacid (the total number of moles of succinic acid and biphenyltetramine is equal to the number of moles of biphenyltetramine), heat and stir to dissolve, so that the total monomer mass concentration is 15wt%. Raise the temperature to 100°C and stir for 5 hours, 140°C for 0.5h, and then raise the temperature to 170°C for 8 hours until the viscosity of the system does not increase any more. After the polymerization is completed, the product is poured into a large amount of deionized water, and excess NaHCO is added 3 , stirred overnight. Filter and wash the polymer with deionized water until neutral. The product is dried to obtain polybenzimidazole.

[0074] Add methylpiperazine and dibromopentane in equimolar ratio to acetone, raise the temperature to 50°C and stir for 12h. After the reaction was completed, the product N was obtained by filtrat...

Embodiment 3

[0079] Add polyphosphoric acid in a stirred reactor, under N 2 Under protection, add diphenylmethyltetramine, oxalic acid and isophthalic acid (the total molar number of oxalic acid and isophthalic acid is equal to the molar number of dihydryltetramine), heat and stir to dissolve, so that the single The total mass concentration is 10wt%. Raise the temperature to 130°C and stir for 2 hours, 150°C for 4 hours, then raise the temperature to 190°C for 6 hours until the viscosity of the system no longer increases. After the polymerization is completed, the product is poured into a large amount of deionized water, and excess NaHCO is added 3 , stirred overnight. Filter and wash the polymer with deionized water until neutral. The product is dried to obtain polybenzimidazole.

[0080] Add 1,6-dipiperidine hexane and dibromopentane in equimolar ratio to acetone, and stir the reaction at 40°C for 24h. After the reaction, filter and dry to obtain the product M'; add 10 mol of the ab...

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Abstract

Disclosed are a bicyclic ammonium ion polybenzimidazole, an anion exchange membrane, and a preparation method therefor and the use thereof, which belong to the technical field of polyelectrolytes and ion exchange membranes. The method involves firstly synthesizing a halogenated spiro ammonium salt, then introducing halogenated spiro ammonium into the molecular chain of polybenzimidazole by means of a grafting reaction, so as to synthesize bicyclic ammonium ion polybenzimidazole, which is subjected to basic ion exchange to prepare a bicyclic ammonium ion polybenzimidazole anion exchange membrane. The bicyclic ammonium ion polybenzimidazole anion exchange membrane prepared according to the method has a good polymer film formation property, a high ionic conductivity, significantly improved mechanical properties and alkali resistance stability, and a good dimensional stability, and can be widely used in fields related to ion exchange membranes, such as fuel cells, flow cells, water electrolysis and electrodialysis, seawater desalination, etc.

Description

technical field [0001] The invention belongs to the technical field of polymer electrolytes and ion exchange membranes, and relates to a bicyclic ammonium ion polybenzimidazole, an anion exchange membrane, a preparation method and application thereof. Background technique [0002] In recent years, the energy crisis and resource depletion have triggered the urgent demand for clean energy in various industries and people's livelihood, and countries around the world have paid more attention to the development of clean energy. Due to its environmental protection, high energy conversion rate and other advantages, fuel cells have attracted more and more researchers' attention. At the same time, fuel cells have also made a series of great progress. Alkaline anion-exchange membrane fuel cell, as a kind of fuel cell, has the advantages of no need for precious metals as catalysts and simple water management, but also faces the challenges of low ion conductivity and poor alkali resista...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/18H01M8/103H01M8/1072
CPCC08G73/18H01M8/103H01M8/1072Y02E60/50
Inventor 朱秀玲刘品阳张帅
Owner DALIAN UNIV OF TECH