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Hydrolyzation tolerant sulfonated polyimide proton exchange membrane and preparation thereof

A sulfonated polyimide, proton exchange membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. The effect of enhancing hydrophobicity and inhibiting hydrolysis

Inactive Publication Date: 2009-01-07
SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sulfonic acid-substituted benzene ring in the molecular structure of traditional polyimide proton exchange membranes is directly connected to the imide bond. The amine

Method used

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  • Hydrolyzation tolerant sulfonated polyimide proton exchange membrane and preparation thereof
  • Hydrolyzation tolerant sulfonated polyimide proton exchange membrane and preparation thereof
  • Hydrolyzation tolerant sulfonated polyimide proton exchange membrane and preparation thereof

Examples

Experimental program
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Effect test

Example

[0024] Preparation Example 1

[0025] (a) Combine 41g (0.1mol) 3,3'-disulfonic acid-4,4'-dihydroxydiphenylsulfone and 41.8g (0.2mol) 2-fluoro-5nitrophenyl trifluoromethane at room temperature Dissolved in a mixed solvent of 100g of N-methyl-2-pyrrolidone, 150g of toluene, 6g of sodium hydroxide and 10g of deionized water, in a nitrogen environment, the temperature is raised to 160°C, after 4 hours of reaction, it is then raised to 190°C for reaction 16 After the reaction is over, the reaction product is cooled to room temperature. After suction filtration with a Buchner funnel, the filtrate is poured into 200 g of anhydrous ethanol solvent while stirring rapidly to form a precipitate. After suction filtration, the filter cake is placed at 80°C Heat and stir in deionized water for 3 hours, and then filter with suction to obtain 64.6 g of nitro-terminated fluorine-containing sulfonated aromatic ring polymer with a yield of 82%;

[0026] (b) Dissolve 20g of nitro-terminated fluorine-...

Example

[0028] Preparation Example 2

[0029](a) 38.8g (0.1mol) 3,3'-disulfonic acid-4,4'-dihydroxyphenyl hexafluoropropane and 41.8g (0.2mol) 2-fluoro-5nitrophenyl trifluoromethane Dissolve in a mixed solvent of 100g N-methyl-2-pyrrolidone, 150g toluene, 6g sodium hydroxide and 10g deionized water at room temperature. In a nitrogen environment, the temperature is raised to 160°C. After 4 hours of reaction, the temperature is raised to 190 React at ℃ for 16 hours. After the reaction is complete, cool the reaction product to room temperature. After suction filtration with a Buchner funnel, pour the filtrate into 200 g of absolute ethanol solvent while stirring rapidly to form a precipitate. After suction filtration, place the filter cake Heat and stir in deionized water at 80°C for 3 hours, and then filter with suction to obtain 55.9 g of fluorine-containing sulfonated aromatic ring polymer with terminal nitro groups, with a yield of 73%;

[0030] (b) Dissolve 20g of nitro-terminated fluor...

Example

[0032] Preparation Example 3

[0033] (a) 37.4g (0.1mol) 3,3'-disulfonic acid-4,4'-dihydroxybenzophenone and 41.8g (0.2mol) 2-fluoro-5nitrophenyl trifluoromethane at room temperature Dissolve it in a mixed solvent of 100g N-methyl-2-pyrrolidone, 150g toluene, 6g sodium hydroxide and 10g deionized water. In a nitrogen environment, the temperature is raised to 160℃, and after 4 hours of reaction, the temperature is raised to 190℃ for reaction. After 16 hours, after the reaction, the reaction product was cooled to room temperature. After suction filtration with a Buchner funnel, the filtrate was poured into 200 g of anhydrous ethanol solvent while stirring quickly to form a precipitate. After suction filtration, the filter cake was placed at 80 Heat and stir in deionized water at ℃ for 3 hours, and then filter with suction to obtain 63.9 g of fluorine-containing sulfonated aromatic ring polymer with terminal nitro groups, with a yield of 85%;

[0034] (b) Dissolve 20g of nitro-termin...

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Abstract

The invention discloses a hydrolysis-resistant sulfonated polyimide proton exchange membrane and a preparation method thereof; the hydrolysis-resistant sulfonated polyimide proton exchange membrane is provided with the following constitutional repeating units. In the invention, a sulfonic acid group and a terminal amino group are caused to be respectively connected with different benzene rings by a condensation reaction, and a perfluoro group is introduced to a benzene ring with an amino group, thus strengthening the hydrophobicity of the terminal amino group part, inhibiting ring opening and degradation of the imide bond resulting from the strong hydrophilic sulfonic acid group in a molecular structure of the proton exchange membrane and improving the chemical stability of the proton exchange membrane.

Description

technical field [0001] The invention relates to a polymer material membrane and a preparation method thereof, in particular to a hydrolysis-resistant sulfonated polyimide proton exchange membrane for fuel cells and a preparation method thereof. Background technique [0002] In direct methanol fuel cell application engineering, if the methanol permeability of the proton exchange membrane is high, a large amount of methanol will permeate to the other side of the membrane to directly react with the oxidant, thereby reducing the energy efficiency of the fuel cell. Sulfonated polyimide proton exchange membrane not only has high proton conductivity, but also has low methanol permeability, so it has attracted extensive attention in the field of proton exchange membrane research. However, the sulfonic acid-substituted benzene ring in the molecular structure of traditional polyimide proton exchange membranes is directly connected to the imide bond. The amine bond group undergoes rin...

Claims

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Application Information

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IPC IPC(8): H01M8/02H01M2/16B01D71/40C08J5/22H01M8/103
CPCY02E60/50
Inventor 韩生
Owner SHANGHAI APPLIED TECHNOLOGIES COLLEGE
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