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A novel preparation method of polyimide proton exchange membrane

A proton exchange membrane and polyimide technology, which is applied in the field of preparation of new polyimide proton exchange membranes, can solve the problems of limited wide use, poor high-temperature conductivity of proton exchange membranes, and high cost

Inactive Publication Date: 2018-12-07
王琪宇
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The proton exchange membranes prepared by the above patents and prior art have poor high-temperature electrical conductivity, high cost, high fuel permeability, etc. These shortcomings limit the wide application of this type of membrane material in the field of fuel cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A preparation method of a novel polyimide proton exchange membrane, the preparation technical scheme is as follows:

[0019] According to the mass fraction, 27 parts of 4,4-bis(4-amino-1-naphthylazo)-2,2-stilbene disulfonic acid, 38 parts of 2-(4-amino-3-methyl- Phenyl)-4-methyl-benzimidazol-5-amine, 8.4 parts of trifunctional polyamine monomers, 1.1 parts of triethylamine and 220 parts of m-cresol were added to the reactor, nitrogen protection , control the temperature to 35°C, stir evenly, then add 8.6 parts of benzoic acid and 68.5 parts of 3,3,4,4-biphenyltetracarboxylic dianhydride into the reactor, then control the temperature at 90°C, and react 5h; after completing the reaction, control the temperature at 180°C and react for 20h; then the reaction system was precipitated into methanol, filtered, washed, dried, and pulverized; the obtained solid was dissolved in 250 parts of dimethyl sulfoxide, and added 1.2 parts of triethylamine, 5 parts of cross-linking agent ...

Embodiment 2

[0027] A preparation method of a novel polyimide proton exchange membrane, the preparation technical scheme is as follows:

[0028]According to the mass fraction, 20 parts of 4,4-bis(4-amino-1-naphthylazo)-2,2-stilbene disulfonic acid, 32 parts of 2-(4-amino-3-methyl- Phenyl)-4-methyl-benzimidazol-5-amine, 6.3-parts of trifunctional polyamine monomers, 0.5 parts of triethylamine and 150 parts of m-cresol were added to the reaction kettle, nitrogen Under protection, control the temperature to 30°C, stir evenly, then add 6.3 parts of benzoic acid and 53.8 parts of 3,3,4,4-biphenyltetracarboxylic dianhydride into the reactor, and then control the temperature at 80°C, React for 3 hours; after the reaction is completed, control the temperature at 160°C and react for 15 hours; then the reaction system is precipitated into methanol, filtered, washed, dried, and pulverized; the obtained solid is dissolved in 200 parts of dimethyl sulfoxide, Add 0.7 parts of triethylamine, 1-10 parts ...

Embodiment 3

[0036] A preparation method of a novel polyimide proton exchange membrane, the preparation technical scheme is as follows:

[0037] According to the mass fraction, 38 parts of 4,4-bis(4-amino-1-naphthylazo)-2,2-stilbene disulfonic acid, 46 parts of 2-(4-amino-3-methyl- Phenyl)-4-methyl-benzimidazol-5-amine, 10.4 parts of trifunctional polyamine monomers, 1.8 parts of triethylamine and 260 parts of m-cresol were added to the reactor, nitrogen protection 12.6 parts of benzoic acid and 78.5 parts of 3,3,4,4-biphenyltetracarboxylic dianhydride were added to the reactor, and then the temperature was controlled at 100°C to react 8h; after completing the reaction, control the temperature at 200°C and react for 25h; then the reaction system was precipitated into methanol, filtered, washed, dried, and pulverized; the obtained solid was dissolved in 300 parts of dimethyl sulfoxide, and added 1.6 parts of triethylamine, 10 parts of cross-linking agent and 5 parts of silane coupling agen...

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Abstract

The invention relates to the field of material preparation, in particular to a preparation method of a novel polyimide proton exchange membrane. The invention discloses a preparation method of a novelpolyimide proton exchange membrane, which comprises the following steps of: firstly, phloroglucinol and 3-Nitro group-5-Trifluoromethylaniline was synthesized from N, N-trifluoromethylaniline and N,N-trifluoromethylaniline. A trifunctional polyamine monomer was synthesized in the presence of potassium carbonate and potassium iodide in the presence of dimethylacetamide as solvent. Then the polyamine monomer and 4, 4-dihydroxybenzoic acid were synthesized by the reaction of 4, 4-dihydroxybenzoic acid with 4, 4-Bis (4-amino-1-naphthylazo)- 2, 2-Stilbene disulfonic acid, 2-(4-Amino-3-Methyl-Phenyl)-4-Methyl-Benzimidazole; benzimidazole-5-Amine and 3, 3, 4, 4-Branched polyimide molecules were synthesized from m-tetracarboxylic dianhydride in m-methylphenol by one-step method. A novel polyimide proton exchange membrane was prepared by crosslinking and coupling agent modification.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a preparation method of a novel polyimide proton exchange membrane. Background technique [0002] Proton exchange membrane fuel cell has become the most promising fuel cell due to its advantages and characteristics such as small size, high safety, convenient assembly and maintenance, and low operating temperature. It is considered to be a revolutionary new generation of energy power system. The main function of the proton exchange membrane is to conduct protons and isolate the anode and cathode. The performance of the proton exchange membrane plays a decisive role in the efficiency and life of the entire battery device. [0003] 201610018579.3 discloses a proton exchange membrane. The proton exchange membrane is made of the composition of sulfonated polyether ether ketone solution, sulfonated polyphenylene ether, polyaniline filtrate, heteropolyacid and titanium dioxide fluid...

Claims

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Application Information

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IPC IPC(8): H01M8/1041H01M8/1067H01M8/1081
CPCH01M8/1041H01M8/1067H01M8/1081Y02E60/50
Inventor 吴红苗王新
Owner 王琪宇
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