Preparation method of perfluorosulfonic acid/nano-alumina proton exchange membrane
A nano-alumina, proton exchange membrane technology, used in rayon manufacturing, final product manufacturing, electrochemical generators, etc., can solve the problems of poor chemical stability, low conductivity of proton exchange membrane, etc., to achieve high water absorption, high efficiency The effect of high utilization rate and easy availability of raw materials
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Embodiment 1
[0027] Nano-alumina particles with a particle size of 90±10nm are ultrasonically processed and highly dispersed in a mixed solution of ethanol and water with a volume ratio of 3:1. Grind 0.3g of perfluorosulfonic acid resin (PFSA) into powder, dissolve it in 3mL of a mixed solution of ethanol and water with a volume ratio of 3:1, and then place it on a constant temperature mixer at 50°C and stir at 1000r / min at high speed for 2 to 3 hours. It was completely dissolved and 0.003 g of high molecular weight polyethylene oxide (PEO) was added. Mix the two solutions, and continue to stir at high speed at constant temperature until the solution is clear and transparent. The obtained mixed solution was subjected to electrospinning, the voltage was set at 10kV, the receiving distance was 8cm, and the flow rate of the solution was 0.4ml / h to obtain a perfluorosulfonic acid / nano-alumina nanofiber membrane. The perfluorosulfonic acid / nano-alumina nanofiber membrane was annealed at 120°C,...
Embodiment 2
[0029] Nano-alumina particles with a particle size of 90±10nm are ultrasonically processed and highly dispersed in a mixed solution of ethanol and water with a volume ratio of 4:1. 0.36 g of perfluorosulfonic acid resin (PFSA) was ground into powder and dissolved in 3 mL of a mixed solution of ethanol and water with a volume ratio of 4:1. Then put it on a constant temperature mixer at 60° C. and stir at a high speed of 1000 r / min for 2 to 3 hours. After it is completely dissolved, add 0.003 g of high molecular weight polyethylene oxide (PEO). Mix the two solutions, and continue stirring at constant temperature and high speed until the solution is clear and transparent. The obtained mixed solution was subjected to electrospinning, the voltage was set at 8kV, the receiving distance was 5cm, and the flow rate of the solution was 0.1ml / h to obtain a perfluorosulfonic acid / nano-alumina nanofiber membrane. The perfluorosulfonic acid / nano-alumina nanofiber membrane was annealed at 1...
Embodiment 3
[0031] Nano-alumina particles with a particle size of 90±10nm are ultrasonically processed and highly dispersed in a mixed solution of ethanol and water with a volume ratio of 3:1. 0.36 g of perfluorosulfonic acid resin (PFSA) was ground into powder and dissolved in 3 mL of a mixed solution of ethanol and water with a volume ratio of 3:1. Then put it on a constant temperature mixer at 50° C. and stir at a high speed of 1000 r / min for 2 to 3 hours. After it is completely dissolved, add 0.009 g of high molecular weight polyethylene oxide (PEO). Mix the two solutions, and continue stirring at constant temperature and high speed until the solution is clear and transparent. The obtained mixed solution was electrospun with a voltage of 10kV, a receiving distance of 8cm, and a solution flow rate of 0.1ml / h to obtain a perfluorosulfonic acid / nano-alumina nanofiber membrane. The perfluorosulfonic acid / nano-alumina nanofiber membrane was annealed at 150°C, then placed in 0.5mol / L dilut...
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