Side chain type sulfonated polyphenyl ether and preparation method thereof

A technology of sulfonated polyphenylene ether and polyphenylene ether, which is applied in the field of side-chain sulfonated polyphenylene ether, can solve the problems of long synthesis route and high temperature polymerization, and achieve the effects of good mechanical properties, high electrical conductivity and low price

Inactive Publication Date: 2011-09-07
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent application number 200810051595.8 discloses a synthesis method of side-chain sulfonated polyaryletherketone and its performance as a proton exchange membrane. The proton conductivity of the side-chain sulfonated polyaryletherketone is higher than that of American DuPont The Nafion membrane produced by the company has a long synthetic route and requires a high temperature polymerization reaction of up to 190°C
Chinese Patent Application No. 200810065095.X discloses a method for synthesizing sulfonated polyarylethers with sulfonic acid groups on the side chain naphthalene ring, but it also has the disadvantage of requiring high temperature polymerization

Method used

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  • Side chain type sulfonated polyphenyl ether and preparation method thereof
  • Side chain type sulfonated polyphenyl ether and preparation method thereof
  • Side chain type sulfonated polyphenyl ether and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Example 1: Synthesis of side-chain sulfonated polyphenylene ether with theoretical side-chain sulfonic acid substitution degree of 40%

[0026] Bromomethylated polyphenylene ether with a bromomethyl content of 10 mmol, 4 mmol of 2-naphthol-6-sodium sulfonate, 5.2 mmol of anhydrous potassium carbonate, and 120 mL of 1-methyl-2-pyrrolidone (NMP ) into a 250mL three-necked round-bottomed flask, ventilated with nitrogen, stirred and reacted at 65°C for 24 hours, then poured the reaction solution into water, and the resulting precipitate was filtered, washed, and dried to obtain the product of the present invention.

Embodiment 2

[0027] Example 2: Synthesis of side-chain sulfonated polyphenylene ether with theoretical side-chain sulfonic acid substitution degree of 65%

[0028] Add bromomethylated polyphenylene ether with a bromomethyl content of 10 mmol, 6.5 mmol of sodium 2-naphthol-6-sulfonate, 6.7 mmol of anhydrous potassium carbonate, and 120 mL of NMP into a 250 mL three-necked round-bottomed flask in sequence , Nitrogen, stirring and reacting at 65°C for 24 hours, then pouring the reaction solution into water, and filtering, washing and drying the resulting precipitate to obtain the product of the present invention.

Embodiment 3

[0029] Example 3: Synthesis of side-chain sulfonated polyphenylene ether with theoretical side-chain sulfonic acid substitution degree of 80%

[0030] Add bromomethylated polyphenylene ether with a bromomethyl content of 10 mmol, 8 mmol of sodium 2-naphthol-6-sulfonate, 10.4 mmol of anhydrous potassium carbonate, and 120 mL of NMP into a 250 mL three-necked round-bottomed flask in sequence, Nitrogen is blown, the reaction solution is poured into water after stirring and reacting at 65°C for 24 hours, and the resulting precipitate is filtered, washed and dried to obtain the product of the present invention.

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Abstract

The invention discloses a side chain type sulfonated polyphenyl ether and a preparation method thereof. The preparation method is characterized by comprising the following steps of: stirring and reacting bromomethylated polyphenyl ether with the bromomethyl functional group total mole of Xmol, Ymol of etherification reagent and Zmol of alkali at 25-85 DEG C for 12-36 hours, wherein X:Y is equal to 1:(0.4-1.0), and Y:Z is equal to 1:(1.0-1.3); pouring the obtained solution into water for precipitating; and washing and drying the sediments to obtain the product. Compared with main chain sulfonated polyphenyl ether, the side chain type sulfonated polyphenyl ether disclosed by the invention has higher chemical stability; the side chain type sulfonated polyphenyl ether can be made into a proton exchange membrane by adopting a solution film coating method; the ion exchange capacity is 1.62mmol / g; and the proton conductivity under the conditions of 25 DEG C and 100 percent of relative humidity is 0.071S / cm and is equivalent to the proton conductivity of a commercialized perfluorosulfonic membrane under the equal test condition.

Description

technical field [0001] The invention belongs to the technical field of side-chain sulfonated polyphenylene ethers, and in particular relates to a method for preparing side-chain sulfonated polyphenylene ethers by chemically modifying bromomethylated polyphenylene ethers through an etherification reaction. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is regarded as a clean and efficient energy source in the 21st century due to its remarkable advantages such as high energy conversion rate, low temperature start-up, and no pollution. The proton exchange membrane is a key component of PEMFC, which mainly plays the role of conducting protons and isolating fuel and oxidant. The commonly used proton exchange membranes are perfluorosulfonic acid membranes produced by DuPont Company of the United States under the trade name of Nafion series. However, due to the high price of perfluorosulfonic acid membranes, the development of new low-cost proton exchange...

Claims

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Application Information

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IPC IPC(8): C08G65/48
Inventor 徐铜文张正辉
Owner UNIV OF SCI & TECH OF CHINA
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