Preparation method of polyvinylidene fluoride grafted p-styrenesulfonic acid proton exchange membrane
A technology of p-styrene sulfonic acid and polyvinylidene fluoride, which is applied in the field of proton exchange membrane of hydrogen-oxygen fuel cells, can solve the problems of low reactivity and complicated production process, and achieves high proton conductivity, good chemical stability, and increased production efficiency. The effect of a large contact area
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Embodiment 1
[0046] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a NaOH saturated solution under this condition, then add ethanol to dilute, and prepare a 1.0mol / L NaOH / ethanol solution;
[0047] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) into the prepared NaOH / ethanol solution at a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;
[0048] 3) Add PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 10%, and after alkali treatment at a constant temperature of 70°C for 2 hours, the obtained solution is first allowed to stand for stratification, and the solution is filtered off, and then Put the solid obtained after filtering the solution into deionized water and soak for 20 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtration...
Embodiment 2
[0053] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a saturated solution of NaOH under this condition, then add ethanol to dilute, and prepare a 1.5mol / L NaOH / ethanol solution;
[0054] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) into the prepared NaOH / ethanol solution at a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;
[0055] 3) Add PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 5%, and after alkali treatment at a constant temperature of 70°C for 1 hour, the obtained solution is firstly allowed to stand for stratification, and the solution is filtered off, and then Put the solid obtained after filtering the solution into deionized water and soak for 14 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtrat...
Embodiment 3
[0060] 1) Weigh a certain amount of solid NaOH, first add water and stir to dissolve with a glass rod, prepare a NaOH saturated solution under this condition, then add ethanol to dilute, and prepare a 1.0mol / L NaOH / ethanol solution;
[0061] 2) Add the phase transfer catalyst tetrabutylammonium bromide (TBAB) into the prepared NaOH / ethanol solution at a dose of 3 mg / ml, stir with a glass rod until the solution is evenly dispersed, and obtain a NaOH / ethanol solution containing TBAB ;
[0062] 3) Add PVDF powder directly to the above solution, the mass fraction of the added PVDF powder in the solution is 6%, after alkali treatment at a constant temperature of 70°C for 1 hour, first let the obtained solution stand for stratification, filter the solution, and then Put the solid obtained after filtering the solution into deionized water and soak for 18 hours, then suction filter with a Buchner funnel, put it into deionized water after suction filtration, and repeat it several times...
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