Epoxy crosslinking sulfonated polyaryletherketone proton exchange membrane material and preparation method thereof

A technology of sulfonated polyaryletherketone and proton exchange membrane, which is applied in chemical instruments and methods, membrane technology, fuel cells, etc., can solve the problems of increased methanol penetration, reduced mechanical properties, and dissolution, and achieves alcohol resistance and Improved temperature resistance, simple operation, and uniform dispersion

Inactive Publication Date: 2010-06-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, a high degree of sulfonation will cause excessive swelling and even dissolution of the polymer in aqueous solution, resulting in a decrease in the mechanical properties of the membrane and an increase in methanol permeation.

Method used

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  • Epoxy crosslinking sulfonated polyaryletherketone proton exchange membrane material and preparation method thereof
  • Epoxy crosslinking sulfonated polyaryletherketone proton exchange membrane material and preparation method thereof
  • Epoxy crosslinking sulfonated polyaryletherketone proton exchange membrane material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0029]Get the sulfonated polyether ketone (the structural formula of described polyether ketone is as shown in formula I, wherein n=350) that the degree of sulfonation is 75%, use 1mol / L Na 2 CO 3 The solution was soaked for 24 hours, washed with deionized water until neutral and dried in vacuum, dissolved in a mixture of ethanol and water with a volume ratio of 1:1, and prepared as a solution with a percentage of 15wt%; weighed 100 parts of polymer Solution, start stirring, under the protection of inert gas, slowly add 10 parts of 10wt% sodium borohydride aqueous solution at 25 ° C, keep the reaction system at 80 ° C and continue to react for 24 hours, after filtration, concentrate the filtrate and vacuum dry to obtain hydroxyl Functionalized sulfonated polyether ketone; the dried reduction product is dissolved in dimethylformamide, and prepared into a solution with a mass percentage of 10 wt%. Take 100 parts of hydroxyl functionalized sulfonated polyether ketone solution wi...

Embodiment 2

[0031] Take sulfonated polyether ether ketone (the structural formula of the polyether ether ketone is shown in formula II, wherein n=300) with a sulfonation degree of 65%, and use 1mol / L Na 2 CO 3 The solution was soaked for 24 hours, washed with deionized water until neutral and dried in vacuum, dissolved in a mixture of methanol and water with a volume ratio of 1:1, and prepared as a 15wt% solution; weighed 100 parts of polymer Solution, start stirring, under the protection of inert gas, slowly add 10 parts of 10wt% sodium borohydride aqueous solution at 25 ° C, keep the reaction system at 80 ° C and continue to react for 24 hours, filter and concentrate the filtrate and vacuum dry to obtain Hydroxyl-functionalized sulfonated polyether ether ketone; the dried reduction product is dissolved in dimethylformamide, and prepared into a solution with a mass percentage of 10 wt%. Take 100 parts of hydroxyl-functionalized sulfonated polyetheretherketone solution with a percentage ...

Embodiment 3

[0033] Get the sulfonated polyether ketone ketone (the structural formula of described polyether ketone ketone is shown in formula III, wherein n=260) that sulfonation degree is 84%, use 1mol / L Na 2 CO 3 The solution was soaked for 24 hours, washed with deionized water until neutral and dried in vacuum, dissolved in a mixture of methanol and water with a volume ratio of 1:1, and prepared as a 15wt% solution; weighed 100 parts of polymer solution, start stirring, under the protection of an inert gas, slowly add 15 parts of 10wt% sodium borohydride aqueous solution at 25°C, keep the reaction system at 80°C and continue to react for 24 hours, after filtering, concentrate the filtrate and vacuum dry to obtain Hydroxyl-functionalized sulfonated polyether ketone ketone; the dried reduction product is dissolved in dimethylformamide, and prepared into a solution with a mass percentage of 10 wt%. Take 100 parts of hydroxyl functionalized sulfonated polyether ketone ketone solution wit...

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Abstract

The invention discloses an epoxy crosslinking sulfonated polyaryletherketone proton exchange membrane material and a preparation method thereof. The preparation of the material comprises the following steps: reducing and modifying sulfonated polyaryletherketone to obtain hydroxide radical functionalized sulfonated polyaryletherketone; then preparing the modified polymer into solution and adding moderate amount of epoxy resin and catalyst to the solution; finishing solvent removing and cross-linking reaction in the process of membrane formation so as to obtain epoxy cross-linking polymer electrolyte membrane material. The electrolyte membrane material of the invention features good dimensional stability, electrical conductivity, alcohol-preventing property, mechanical strength and heat-resistant quality and enjoys significant application value in fields such as Proton Exchange Membrane Fuel Cells (PEMFC), Direct Methanol Fuel Cells (DMFC), ion exchange resin, sensors membrane separation and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of functional polymer materials, and relates to an epoxy cross-linked sulfonated polyaryletherketone proton exchange membrane material and a preparation method thereof. Background technique [0002] Polymer proton exchange membrane is the key material of proton exchange membrane fuel cell (PEMFC) and direct methanol fuel cell (DMFC). important role. The commonly used proton exchange membrane is the Nafion membrane produced by DuPont Company. The Nafion membrane has excellent mechanical properties, good chemical stability, oxidation resistance stability and high electrical conductivity. However, its application is limited to some extent due to its disadvantages such as high cost, poor high-temperature proton conductivity, and high methanol permeability. Therefore, finding new non-fluorine proton exchange membranes with low cost, high temperature resistance and good alcohol resistance is the k...

Claims

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Application Information

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IPC IPC(8): C08J5/22C08G65/48C08G8/28C08G75/23H01M8/02B01D71/52B01D71/68B01D71/72H01M8/1072
CPCY02E60/50
Inventor 尚玉明冯少广谢晓峰王要武王树博董文琦
Owner TSINGHUA UNIV
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