Preparation method of polysulfone modification based anionic membrane having ultralow aqueous solution swelling degree for fuel cell

An anion membrane and fuel cell technology, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of conductivity loss, alkali resistance reduction, unfavorable environmental protection, etc., to improve ion exchange capacity and conductivity, and good mechanical properties , Excellent alkali resistance effect

Active Publication Date: 2016-01-27
LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Trimethylammonium cation (TMA + ) grafted onto the polysulfone backbone to prepare PSF-TMA + Anionic membrane, although this method effectively improves the conductivity of the membrane, but the alkali resistance of the membrane is greatly reduced, 60 o After immersing the anionic membrane in 1M KOH solution for 24 hours at C, the conductivity lost an average of 37%
In addition, most methods of grafting modified polysulfone membranes are complex, time-consuming, and pollute the environment.
Most studies use chloromethylation to modify polysulfone molecules. The chloromethyl ether used in the process and the above-mentioned trimethylamine are toxic carcinogens and are not conducive to environmental protection.
The G involved in the present invention 12-2-12 The method of preparing anionic membrane with ultra-low swelling degree by physical blending doping into polysulfone structure has not been reported yet

Method used

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  • Preparation method of polysulfone modification based anionic membrane having ultralow aqueous solution swelling degree for fuel cell
  • Preparation method of polysulfone modification based anionic membrane having ultralow aqueous solution swelling degree for fuel cell
  • Preparation method of polysulfone modification based anionic membrane having ultralow aqueous solution swelling degree for fuel cell

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Embodiment 1

[0019] Doping G 12-2-12 The preparation method of cationic polysulfone modified anionic membrane comprises the following steps:

[0020] Step 1. Weigh 5g of polysulfone particles, add them to a beaker containing 20mL of chloroform solvent, and perform magnetic stirring at room temperature. After the polysulfone is completely dissolved, add G with a purity of 50%. 12-2-12 type molecule 1.11g, making G in the prepared anion membrane 12-2-12 The mass percentage of type molecule is 10%, continue to stir at room temperature until it is completely dissolved, ultrasonically oscillate for 30 minutes, and centrifuge to defoam. Then cast a film on a horizontal glass plate by casting method, and peel it off after the film is naturally air-dried.

[0021] Step 2, immerse the film in 100mL deionized water, change the water every 20min, after soaking for 3 hours, dry the deionized water on the surface of the composite film, place it at room temperature (48h), slowly evaporate the water in...

Embodiment 2

[0024] Doping G 12-2-12 The preparation method of cationic polysulfone modified anionic membrane comprises the following steps:

[0025] Step 1. Weigh 5g of polysulfone particles, add them to a beaker containing 20mL of chloroform solvent, and perform magnetic stirring at room temperature. After the polysulfone is completely dissolved, add G with a purity of 50%. 12-2-12 Type molecule 2.5g, so that G in the prepared anion membrane 12-2-12 The mass percentage of the type molecule is 20%, continue to stir at room temperature until it is completely dissolved, ultrasonically oscillate for 30 minutes, and centrifuge to defoam. Then cast a film on a horizontal glass plate by casting method, and peel it off after the film is naturally air-dried.

[0026] Step 2, immerse the film in 100mL deionized water, change the water every 20min, after soaking for 3 hours, dry the deionized water on the surface of the composite film, place it at room temperature (48h), slowly evaporate the wate...

Embodiment 3

[0029] Doping G 12-2-12 The preparation method of cationic polysulfone modified anionic membrane comprises the following steps:

[0030] Step 1. Weigh 5g of polysulfone particles, add them to a beaker containing 20mL of chloroform solvent, and perform magnetic stirring at room temperature. After the polysulfone is completely dissolved, add G with a purity of 50%. 12-2-12 type molecule 4.30g, so that G in the prepared anion membrane 12-2-12 The mass percentage of type molecules is 30%, continue to stir at room temperature until completely dissolved, ultrasonically oscillate for 30 minutes, and centrifuge to defoam. Then cast a film on a horizontal glass plate by casting method, and peel it off after the film is naturally air-dried.

[0031] Step 2, immerse the film in 100mL deionized water, change the water every 20min, after soaking for 3 hours, dry the deionized water on the surface of the composite film, place it at room temperature (48h), slowly evaporate the water in the...

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Abstract

The invention relates to a polysulfone modification based anionic membrane having ultralow aqueous solution swelling degree for a fuel cell and a preparation method of the anionic membrane, belonging to the technical field of fuel cells. The preparation method comprises the following steps of completely dissolving polysulfone (PSF) particles having rigid macromolecule skeleton structures as a membrane base solution by taking chloroform as a solvent; uniformly doping conductive material Gemini molecules {diethyl maleate di[dimethyl dodecyl]ammonia/ammonium bromide], named with G<12-2-12>} to a chloroform casting membrane solution of the PSF by a simple physical blending method; casting to form a membrane on a glass plate by tape casting method, immersing the dried film in a potassium hydroxide solution, and preparing hydroxyl ion type composite die. The aniomic membrane prepared according to the method has ultralow swelling degree, excellent alkaline resistant performance and favorable mechanical property, the conductivity of the membrane is effectively improved, and the problems of poor alkaline resistance, overhigh swelling, poor mechanical property and the like caused by overhigh grafting percent of the polysulfone modified anionic membrane are solved.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and relates to a membrane electrolyte preparation technology for anion exchange membrane fuel cells, in particular to a method for preparing an anion membrane for fuel cells based on polysulfone modification and having an ultra-low aqueous solution swelling degree. Background technique [0002] As one of many fuel cells, direct methanol fuel cells (DMFCs) not only have the characteristics of high energy conversion efficiency, environmental friendliness, and almost no emission of nitrogen oxides and sulfur oxides, but also small size, simple structure, and its fuel is easy to store. And transportation, so it has received more and more attention. Among them, anion-exchange membrane fuel cells (AEMFCs) use non-precious metals as catalysts, which are low in cost and can improve the efficiency of fuel cells, so there has been a wave of research on them. As the core of AEMFCs, an ideal anion exchan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88
CPCH01M4/8807Y02E60/50
Inventor 王璐璐张帆王吉林
Owner LIAONING UNIVERSITY OF PETROLEUM AND CHEMICAL TECHNOLOGY
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