A kind of preparation method of anion exchange membrane with mono-multivalent selective separation function
An anion exchange membrane and functional technology, applied in the field of separation membranes, can solve the problems of increasing membrane resistance, easy detachment of the modified layer, reducing ion exchange capacity, etc., and achieve the effect of low increase and good unit price selection separation function
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Embodiment 1
[0032] Commercially available homogeneous anion exchange membranes (JAM-II-07, Beijing Tingrun, China) were cut into appropriate sizes, soaked in pure water to remove hydrophilic substances on the surface, and stored in pure water for later use. Weigh 0.50g of DAS powder, dissolve it in pure water, adjust the pH of the solution to 3.8 with dilute hydrochloric acid, and prepare a 100mL solution.
[0033] Fix two anion exchange membranes in a laboratory-made three-compartment device, such as figure 2 As shown, add 100mL of 5.0mg / mL DAS solution (pH=3.8) in the middle compartment, soak on one side for 1min, then take out the membrane, crosslink under ultraviolet light for 30min, and finally store the membrane in pure water, label for S-1.
Embodiment 2
[0035] The soaking time of one side in the above-mentioned Example 1 was increased to 3 minutes, and other steps and conditions remained unchanged, and the obtained film was marked as S-3.
Embodiment 3
[0037] The soaking time of one side in the above-mentioned Example 1 was increased to 5 minutes, and other steps and conditions remained unchanged, and the obtained film was marked as S-5.
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