A kind of homogeneous anion exchange membrane and preparation method thereof
A technology of anion exchange membrane and membrane liquid, which is applied in the field of homogeneous anion exchange membrane and its preparation, can solve the problems of ion exchange capacity loss, environmental pollution, complicated steps, etc., and achieve enhanced dimensional stability, improved comprehensive performance, homogeneous The effect of stable performance
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Embodiment 1
[0025] Dissolve 1 g of bromomethylated poly(1,4-dimethyl 2,6-phenylene oxide) (BPPO) in a mixed solution consisting of 0.25 mL of p-chloromethyl styrene and 1.8 mL of styrene at room temperature. Stir to obtain a uniform solution; add 0.35mL vinylimidazole dropwise to the uniform solution, stir until the solution is uniform, then add 0.075mL methimidazole dropwise, after stirring evenly, apply the film solution evenly on the coating plate, at 100 After drying at ℃ for 12 hours, a film was formed to obtain a homogeneous anion exchange membrane.
[0026] The homogeneous anion exchange membrane that present embodiment obtains is carried out infrared test, and the result is: 1653cm -1 and 1604cm -1 The characteristic peak corresponding to the double bond in the structure, 2923cm -1 and 2960cm -1 Respectively correspond to -CH 2 -and-CH 3 The vibration peak of , 3060cm -1 It is the characteristic peak of -N=C-H on the imidazole group, which proves the occurrence of quaterniza...
Embodiment 2
[0029] This example adopts the same operation process as Example 1, the only difference is that the amount of p-chloromethylstyrene is increased to 0.5mL, and then the amount of vinylimidazole and methylimidazole is adjusted to 0.45mL and 0.15mL respectively, to obtain Structurally similar homogeneous anion exchange membranes.
[0030] After testing, the water content and ion exchange capacity of the anion exchange membrane prepared in this example are 64.1% and 2.14mmol / g-dry film respectively, the ion transfer number is 0.93, and the membrane resistance is 1.12Ω·cm 2 . Experimental data show that the membrane has good conductivity and high anion selectivity, and can be used in the field of electrodialysis.
Embodiment 3
[0032] This example adopts the same operation process as Example 1, the only difference is that the dosage of p-chloromethylstyrene is increased to 0.75mL, and then the dosage of vinylimidazole and methylimidazole is adjusted to 0.53mL and 0.23mL respectively, to obtain Structurally similar homogeneous anion exchange membranes.
[0033] After testing, the water content and ion exchange capacity of the anion exchange membrane prepared in this example are 77.5% and 2.3mmol / g-dry film respectively, the ion migration number is 0.95, and the membrane resistance is 1.12Ω·cm 2 . Experimental data show that the membrane has good conductivity and high anion selectivity, and can be used in the field of electrodialysis.
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