Non-fluorine proton exchange membrane doped and modified by electrospinning one-dimensional hollow porous inorganic nanofibers and preparation method of non-fluorine proton exchange membrane
An inorganic nanofiber, proton exchange membrane technology, applied in the direction of inorganic raw material artificial filaments, circuits, fuel cells, etc., can solve the problem that the specific surface area of nanofibers needs to be further improved, to promote the separation of hydrophilic and hydrophobic microphases, and improve proton conduction. efficiency, high specific surface area
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Embodiment 1
[0033] The first step is to prepare sulfated hollow porous tin dioxide nanofibers:
[0034] Add 0.5g polyacrylonitrile into 10mL N,N-dimethylformamide solvent, stir magnetically in an oil bath at 80°C for 12h, after cooling at room temperature, add 1.5g polyvinylpyrrolidone, stir magnetically at room temperature for 5h to fully dissolve. Add 0.2 g of stannous chloride dihydrate to the above polymer solution, stir at room temperature for 5 h to fully dissolve it. The above spinning solution was transferred into a syringe and placed on a syringe pump. At an applied voltage of 20 kV, the feeding rate of the syringe pump was 8 μL min -1 , the distance between the needle and the roller receiver is 15cm, the needle of the syringe is 23G, the relative humidity of the environment is between 35-45%, and the temperature is 25°C to prepare nanofibers under the spinning conditions. After the above-mentioned fibers are fully dried, at a heating rate of 5°C min -1 , and the temperature w...
Embodiment 2
[0039] The first step is to prepare sulfated hollow porous tin dioxide nanofibers:
[0040] Add 0.5g polyacrylonitrile to 10mL N,N-dimethylformamide solvent, stir magnetically in an oil bath at 70°C for 16h, after cooling at room temperature, add 0.5g polyvinylpyrrolidone, stir magnetically at room temperature for 6h to fully dissolve. Add 0.1 g of stannous chloride dihydrate to the above polymer solution, and stir at room temperature for 6 h to fully dissolve it. The above spinning solution was transferred into a syringe and placed on a syringe pump. At an applied voltage of 15 kV, the feeding rate of the syringe pump was 4 μL min -1 , the distance between the needle and the roller receiver is 10cm, the needle of the syringe is 19G, the relative humidity of the environment is between 35-45%, and the temperature is 25°C to prepare nanofibers under the spinning conditions. After the above-mentioned fibers are fully dried, at a heating rate of 2°C min -1 , and the temperature...
Embodiment 3
[0044] The first step is to prepare sulfated hollow porous tin dioxide nanofibers:
[0045] Add 0.5g polyacrylonitrile into 10mL N,N-dimethylformamide solvent, stir magnetically in an oil bath at 90°C for 8h, after cooling at room temperature, add 2.5g polyvinylpyrrolidone, stir magnetically at room temperature for 6h to fully dissolve. Add 0.3 g of stannous chloride dihydrate to the above polymer solution, and stir at room temperature for 6 h to fully dissolve it. The above spinning solution was transferred into a syringe and placed on a syringe pump. At an applied voltage of 30 kV, the feeding rate of the syringe pump was 12 μL min -1 , the distance between the needle and the roller receiver is 20cm, the needle of the syringe is 27G, the relative humidity of the environment is between 35-45%, and the temperature is 25°C to prepare nanofibers under the spinning conditions. After the above fiber is fully dried, at a heating rate of 8°C min -1 , and annealed at 600° C. for 2...
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