Proton exchange membrane and preparation method and application thereof
A technology of proton exchange membrane and silicon dioxide, which is applied in the field of proton exchange membrane, can solve the problems of low proton conductivity and poor stability of proton exchange membrane, and achieve the effect of improving uniform dispersion, reducing water absorption and improving water retention performance
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Embodiment 1
[0045] A preparation method of a proton exchange membrane, comprising the following steps:
[0046] 1) Sulfonation of polyether ether ketone
[0047] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45°C, and the reaction was carried out under vigorous stirring for 8-72 h. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH value of the polymer was close to neutral (pH>6). The final product was placed in an oven at 105°C for drying to constant weight.
[0048] 2) Preparation of silica particles
[0049] The silica particles were prepared by the Störber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and ammonia solution (6 mL), and the solution was stirred at room temperat...
Embodiment 2
[0057] A preparation method of a proton exchange membrane, comprising the following steps:
[0058] 1) Sulfonation of polyether ether ketone
[0059] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45°C, and the reaction was carried out under vigorous stirring for 8-72 h. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH value of the polymer was close to neutral (pH>6). The final product was placed in an oven at 105°C for drying to constant weight.
[0060] 2) Preparation of silica particles
[0061] Silica particles were prepared using the Störber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and ammonia solution (6 mL), and the solution was stirred at room temperatu...
Embodiment 3
[0069] A preparation method of a proton exchange membrane, comprising the following steps:
[0070] 1) Sulfonation of polyether ether ketone
[0071] 20 g of PEEK was dried in an oven at 105 °C overnight, and then dissolved in 200 mL of concentrated sulfuric acid at room temperature. After dissolving, the temperature was raised to 45°C, and the reaction was carried out under vigorous stirring for 8-72 h. After the reaction, the reacted solution was poured into ice water, and the resulting precipitate was washed with deionized water to remove excess acid until the pH value of the polymer was close to neutral (pH>6). The final product was placed in an oven at 105°C for drying to constant weight.
[0072] 2) Preparation of silica particles
[0073] The silica particles were prepared by the Storber method. 10 mL of TEOS was added dropwise to a mixed solution consisting of ethanol (200 mL), water (20 mL) and ammonia solution (6 mL), and the solution was stirred at room temperat...
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