Homogeneous phase anion-exchange membrane and preparation method thereof
A technology of anion exchange membrane and polymer reinforcing agent, which is applied in the field of homogeneous anion exchange membrane and its preparation, can solve the problems of complex steps, limited exchange capacity, environmental pollution, etc., and achieve good dimensional stability, high strength, and easy scale effect
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Embodiment 1
[0025] Dissolve 3g of methyl brominated polyphenylene ether in 10ml of a mixed solution of chloromethylated styrene and divinylbenzene with a volume fraction of 6% of divinylbenzene at room temperature, stir well to obtain a uniform solution, and then add 0.8g of peroxide Benzoyl initiator, after being completely dissolved, a uniform coating solution is obtained; the coating solution is coated on a polypropylene fabric with a thickness of 0.10mm, and polymerized at 80°C for 8 hours to obtain a base film; the base film is taken out, and the base film is Soak the membrane in a 10% ammonia solution at room temperature for 24 hours, then quaternize it in a 10% trimethylamine solution for 12 hours, and then immerse it in a 1mol / l NaCl solution to convert it into the Cl form .
[0026] Infrared test is carried out on the base film after the above treatment, the result is: 500-600cm -1 Corresponding to the stretching vibration peak of C-Br in brominated polyphenylene ether, 790-810c...
Embodiment 2
[0029] Using the same operating process as in Example 1, except that the amount of methyl brominated polyphenylene ether was changed to 1 g, and the amount of initiator was changed to 0.3 g, a film with a similar structure was obtained.
[0030] It is measured that the water content and ion exchange capacity of the anion exchange membrane prepared by the present embodiment are 12.4% and 0.91mmol / g-dry film respectively, and the membrane resistance is 16.69Ω·cm 2 , the ion mobility number is 0.83.
Embodiment 3
[0032]Using the same operation process as in Example 1, but changing the amount of methyl brominated polyphenylene ether to 4 g and the amount of initiator to 1.4 g, a film with a similar structure was obtained.
[0033] It is measured that the water content and ion exchange capacity of the anion exchange membrane prepared in this embodiment are 19.9% and 1.53mmol / g-dry film respectively, and the membrane resistance is 2.79Ω·cm 2 , the ion mobility number is 0.96. Experimental data show that the membrane has good conductivity and high anion selectivity, and can be applied in the field of electrodialysis.
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