Composite proton exchange membrane based on acetate fiber porous support body and preparation method thereof

A technology of proton exchange membrane and cellulose acetate, which is applied in the direction of fuel cells, electrochemical generators, electrical components, etc., can solve the problems that cannot be completely solved in the preparation of proton exchange membranes, such as operational performance, dimensional stability, alcohol resistance and mechanical properties. , Affect the actual use of polymer membranes with high sulfonation degree, etc., to achieve the effect of improving mechanical strength and aging resistance, compactness and high uniformity, and high peeling resistance

Active Publication Date: 2021-04-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a higher degree of sulfonation often leads to a significant increase in the water absorption of the polymer membrane, and water absorption will lead to a decrease in the dimensional stability, alcohol resistance and mechanical properties of the membrane, thereby affecting the practical use of polymer membranes with a high degree of sulfonation.
The above-mentioned composite membranes cannot completely solve the preparation defects of proton exchange membranes and the operating performance in high-temperature and low-humidity environments

Method used

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  • Composite proton exchange membrane based on acetate fiber porous support body and preparation method thereof
  • Composite proton exchange membrane based on acetate fiber porous support body and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Weigh 10 g of sulfonated polyetheretherketone and add it to a mixed solvent of 100 g of N-methylpyrrolidone, 50 g of isopropanol and 40 g of deionized water, and stir at room temperature for 12 hours to obtain a transparent polymer solution with a concentration of 5 wt %;

[0034] (2) Weigh 0.25g of phosphotungstic acid and add it to the polymer transparent solution in (1), stir at room temperature for 1 hour, and leave to defoam to obtain casting solution 3;

[0035] (3) Take by weighing 1g dicumyl peroxide and 0.1g nano silicon dioxide and join in the mixed solvent of 666g deionized water and 333g ethanol, ultrasonically disperse evenly, set aside;

[0036](4) With the coating process of coating speed 1m / min, coating thickness 20 μ m, the casting solution 3 in (2) is evenly coated on the porous acetate support body 1 with the coating die head 2, at 60 ℃ The drying oven-4-1 is dried, then in the spraying chamber 5 with the spraying process of spraying flow rate 5mL...

Embodiment 2

[0038] (1) Weigh 20g of sulfonated polyethersulfone and add it to a mixed solvent of 59g N,N-dimethylformamide, 30g isopropanol and 24g deionized water, stir at room temperature for 12h, and obtain a transparent polymer with a concentration of 15wt%. solution;

[0039] (2) Weighing 3g of phosphomolybdic acid and adding it to the polymer transparent solution in (1), stirring at room temperature for 1h, and standing for defoaming to obtain casting solution 3;

[0040] (3) Take by weighing 3g benzoyl peroxide and 3g nanometer zinc oxide and join in the mixed solvent of 333g deionized water and 333g ethanol, ultrasonic dispersion is even, for subsequent use;

[0041] (4) Coating process with coating speed 5m / min, coating thickness 50μm uses coating die head 2 to uniformly coat casting liquid 3 in (2) on acetate porous support body 1, at 100 ℃ The drying oven-4-1 is dried, then in the spraying chamber 5 with the spraying process of spraying flow rate 10mL / min, spraying nozzle 5-1 ...

Embodiment 3

[0043] (1) Weigh 20 g of sulfonated polyphenylsulfone and add it to a mixed solvent of 95 g of dimethyl sulfoxide, 47 g of isopropanol and 38 g of deionized water, and stir at room temperature for 12 hours to obtain a polymer transparent solution with a concentration of 10 wt %;

[0044] (2) Weigh 2g of silicotungstic acid and add it to the polymer transparent solution in (1), stir at room temperature for 1 hour, and after standing for defoaming, the casting solution 3 is obtained;

[0045] (3) Take by weighing 1g benzoyl peroxide and 0.5g nano silicon dioxide and join in the mixed solvent of 165g deionized water and 133g ethanol, ultrasonically disperse evenly, set aside;

[0046] (4) With a coating speed of 3m / min and a coating thickness of 30 μm, the casting solution 3 in (2) is uniformly coated on the cellulose acetate porous support 1 with a coating die head 2 at 80° C. The oven one 4-1 is dried, then in the spraying chamber 5 with the spraying process of spraying flow ra...

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Abstract

The invention discloses a composite proton exchange membrane based on an acetate fiber porous support body and a preparation method of the composite proton exchange membrane. The composite proton exchange membrane comprises the acetate fiber porous support body, a polymer proton conductor, an enhanced proton conduction additive and a cross-linking agent. The preparation method comprises the following steps of: coating the acetate fiber porous support body with a membrane casting solution by adopting a preset coating process, carrying out drying treatment by virtue of a drying oven I, spraying the cross-linking agent and an inorganic oxide solution by adopting a preset spraying process, carrying out leveling and cross-linking reaction by virtue of rolling of a hot-pressing composite roller, and carrying out drying treatment through using a drying oven II to obtain the composite proton exchange membrane based on the acetate fiber porous support body. The proton exchange composite membrane prepared by the method is high in proton conductivity, high in mechanical strength, compact and high in uniformity.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a composite proton exchange membrane based on a cellulose acetate porous support and a preparation method thereof. Background technique [0002] Fuel cells are considered to be the preferred clean and efficient power generation technology in the 21st century, and the most effective and promising field for solving energy problems. Among them, the proton exchange membrane fuel cell has attracted much attention due to its advantages of greenness, high efficiency and simple structure. Proton exchange membrane is one of the core components of membrane fuel cell. Proton conductivity is the core parameter of proton exchange membrane, which determines the battery performance. In the battery, it plays the role of conducting protons, blocking electrons, and separating reactants, and its performance directly determines the performance and life of the battery. An ideal proton exchange ...

Claims

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Application Information

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IPC IPC(8): H01M8/1062H01M8/106H01M8/1053H01M8/1069
CPCH01M8/1062H01M8/106H01M8/1053H01M8/1069Y02E60/50
Inventor 张洪杰郝金凯邵志刚
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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