Special amino modified perfluorosulfonic membrane for fuel cell, and preparation method
A perfluorosulfonic acid membrane, amino-modified technology, applied in fuel cells, circuits, electrical components, etc., can solve the problems of large dependence on external moisture content control, branch length, limited use, etc., to improve proton adsorption and migration. Ability, high structural symmetry, high feasibility effect
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Embodiment 1
[0040] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:
[0041] a. Sulfonation of tetrafluoroethylene: Add sulfuric acid in a closed container, vacuumize it to make the pressure below 10Pa, then pass tetrafluoroethylene into it, and heat to react. The reaction temperature is 600°C, the pressure is 3MPa, and the reaction is 20h After that, get COFCF 2 SO 2 F;
[0042] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, and the volume percentage of fluorine in the mixed gas is more than 30%; and the molar ratio of 3-aminopropene to fluorine is 1:10;
[0043] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 10 hours to obtain...
Embodiment 2
[0050] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:
[0051] a. Sulfonation of tetrafluoroethylene: Add sulfuric acid in a closed container, vacuumize to make the pressure below 10Pa, then pass through tetrafluoroethylene, and heat to react. The reaction temperature is 800°C, the pressure is 6MPa, and the reaction is 10h After that, get COFCF 2 SO 2 F;
[0052] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, the volume ratio of fluorine and nitrogen in the mixed gas is 1:1; and the molar ratio of 3-aminopropene to fluorine is 1:5;
[0053] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 15 hours to obtain a modifie...
Embodiment 3
[0058] The following method was used to prepare the amino-modified perfluorosulfonic acid membrane for fuel cells:
[0059] a. Sulfonation of tetrafluoroethylene: add sulfuric acid in a closed container, vacuumize it to make the pressure below 10Pa, then pass tetrafluoroethylene into it, and heat to react. The reaction temperature is 700°C, the pressure is 4MPa, and the reaction is 12h After that, get COFCF 2 SO 2 F;
[0060] b. Fluorination of 3-aminopropene: Under the condition of excluding oxygen, fluorinate 3-aminopropene to obtain CF 2 CFCF 2 NF 2 ; The fluorinating reagent used for fluorination is a mixed gas of fluorine and nitrogen, the volume ratio of fluorine and nitrogen in the mixed gas is 2.5:1; and the molar ratio of 3-aminopropene to fluorine is 1:9;
[0061] c, condensation reaction: the COFCF of step a 2 SO 2 CF for steps F and b 2 CFCF 2 NF 2 Put it in a closed container, and react under high temperature and high pressure for 12 hours to obtain a mo...
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