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Mixed matrix anionic membrane and manufacturing method thereof

An anionic membrane and mixed matrix technology, applied in fuel cells, electrochemical generators, electrical components, etc., can solve problems such as limited bromination degree, achieve low swelling rate, increase free volume, and promote transfer effects

Active Publication Date: 2019-03-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the field of anion exchange, only Yushan Yan et al. [CrystEngComm, 2017, 19, 4905–4910] have reported a NBS bromide grafting route, which makes the covalent organic framework material loaded with quaternary ammonium with anion-conducting function. Salt, because its bromination process is a heterogeneous reaction, the degree of bromination is limited, and its HCO at room temperature 3 - The conductivity is only 5.3mS·cm -1

Method used

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  • Mixed matrix anionic membrane and manufacturing method thereof
  • Mixed matrix anionic membrane and manufacturing method thereof
  • Mixed matrix anionic membrane and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0047] Hydrophilic modification of polyarylethersulfone: under nitrogen atmosphere, weigh 1g of chloromethylated polysulfone (DC=123%) material, dissolve it in 20mL of NMP, add 1.03g of diethanolamine, react at 80°C for 24h, and The reactant was poured into ethanol for precipitation, and after suction filtration and drying, the hydroxylated polyarylethersulfone HPSf was obtained (infrared spectrum, see figure 1 , a clear C-N peak appeared in the product, confirming that the alkylation reaction was successful).

[0048] Synthesis of 1,3,5-trialdehyde phloroglucinol: under nitrogen atmosphere, add 6.014g phloroglucinol, 15.098g urotropine and 90mL trifluoroacetic acid, react at 100°C for 2.25h, add 210mL of 3mol / L hydrochloric acid aqueous solution, continue to react for 0.75h. After it was cooled to room temperature, it was filtered with diatomaceous earth, and the filtrate was extracted with 350 mL of dichloromethane. The organic phase was dried over anhydrous magnesium sulfa...

Embodiment 2

[0053] Hydrophilic modification of polyarylethersulfone: under nitrogen atmosphere, weigh 1g of chloromethylated polysulfone (DC=123%) material, dissolve it in 10mL of NMP, add 1.03g of diethanolamine, react at 40°C for 48h, and The reactant was poured into ethanol to precipitate, and after suction filtration and drying, the hydroxylated polyarylethersulfone HPSf was obtained.

[0054] Synthesis of 1,3,5-trialdehyde phloroglucinol: under nitrogen atmosphere, add 5.594g phloroglucinol, 15.098g urotropine and 70mL trifluoroacetic acid, react at 120°C for 2h, add 234mL 3mol / L hydrochloric acid aqueous solution, continue to react for 0.5h. After it was cooled to room temperature, it was filtered with diatomaceous earth, and the filtrate was extracted with 350 mL of dichloromethane. The organic phase was dried over anhydrous sodium sulfate and rotary evaporated to obtain a yellowish powder, which was rinsed with an appropriate amount of hot ethanol and dried.

[0055] Synthesis of...

Embodiment 3

[0059] Hydrophilic modification of polyarylethersulfone: under nitrogen atmosphere, weigh 1.5g of chloromethylated polysulfone (DC=123%) material, dissolve it in 10mL of NMP, add 1.55g of diethanolamine, react at 100°C for 12h, Pour the reactant into ethanol to precipitate, and obtain hydroxylated polyarylethersulfone HPSf after suction filtration and drying.

[0060] Synthesis of 1,3,5-trialdehyde phloroglucinol: under nitrogen atmosphere, add 6.993g phloroglucinol, 15.098g urotropine and 105mL trifluoroacetic acid, react at 80°C for 2.5h, add 175mL of 3mol / L hydrochloric acid aqueous solution, continue to react for 1h. After it was cooled to room temperature, it was filtered with diatomaceous earth, and the filtrate was extracted with 350 mL of dichloromethane. The organic phase was dried over anhydrous magnesium sulfate and rotary evaporated to obtain a yellowish powder, which was rinsed with an appropriate amount of hot ethanol and dried.

[0061] Synthesis of TpEB covale...

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Abstract

The invention provides a mixed matrix anionic membrane and a manufacturing method thereof, and belongs to the field of battery membrane materials. A hydroxylated hydrophilically modified polymeric material is used as a substrate of the anionic membrane, and a covalent organic framework material loaded with a quaternary ammonium salt is doped. In manufacturing, monomer preparation and polymerization of the covalent organic framework material, hydroxylation hydrophilic modification of a polymer, uniform mixing of the covalent organic framework material and hydroxylated modified polymer, flow film formation are performed in sequence, and finally, an anion-exchange membrane is obtained by alkali treatment. The covalent organic framework material is loaded with quaternary ammonium groups, and can effectively improve ionic conductivity. A porous structure of the covalent organic framework can increase free volume in the membrane to promote transfer of hydroxyl, and the rigid framework can significantly inhibit swelling in the membrane. Hydroxylamine groups can improve hydrophilicity of the membrane and promote formation of a good hydrated ion channel, and meanwhile the polar hydroxylamine group can promote compatibility between the polymer and the covalent organic framework material. The anionic membrane has better dimensional stability.

Description

technical field [0001] The invention belongs to the field of battery membrane materials, and relates to a mixed matrix anion membrane and a preparation method thereof. Background technique [0002] As a new type of clean, efficient and controllable energy conversion device, fuel cells have attracted widespread attention from various countries. Alkaline fuel cells are becoming increasingly popular in the field of fuel cells due to their unique advantages such as low catalytic cost and low fuel penetration. Basic anion exchange membrane is one of the important components. At present, anion exchange membranes can be roughly divided into two categories: homogeneous polyelectrolyte membranes and mixed matrix membranes. [0003] Mixed matrix membranes often improve the mechanical properties, fuel permeation or ion conductivity of the membrane by introducing functional particles. However, due to the poor interface interaction between polymers and inorganic materials, traditional ...

Claims

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Application Information

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IPC IPC(8): H01M8/1044H01M8/1069C08G83/00
CPCC08G83/008H01M8/1044H01M8/1069Y02E60/50
Inventor 张凤祥李旅巩守涛李攀月阿克塔马玲玲周芮霆贾亚斌
Owner DALIAN UNIV OF TECH
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