An ionic liquid/metal organic framework zif-8 composite membrane and its preparation method and application
A technology of metal-organic framework and ZIF-8, which is applied in the field of membrane separation, can solve the problems of large membrane thickness and improvement of permeation and separation performance, and achieve high gas permeability, good gas permeation and separation performance and stability, and simple process Effect
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Embodiment 1
[0037] (1) Preparation of ZIF-8 sol:
[0038] 1) Dissolve zinc nitrate hexahydrate (1.47g) and 2-methylimidazole (3.25g) in 100ml of anhydrous methanol, respectively, to obtain a methanol solution of zinc nitrate and a methanol solution of 2-methylimidazole, respectively. The methanol solution of zinc was poured into methanol solution of 2-methylimidazole, and the solution was stirred at room temperature for 1 h.
[0039]2) The above-mentioned reactant is centrifuged at least once to completely remove the unreacted precursor, and each centrifugation condition is centrifugation at 8000-10000rpm for 10min, and the collected precipitate is washed with methanol, and dispersed in methanol after washing; further, the centrifugation condition is: The supernatant was collected by centrifugation at 8000-10000rpm for 10min to obtain ZIF-8 sol (see figure 1 ) at a concentration of 1.5 mg / mL.
[0040] Depend on figure 1 It is shown that the ZIF-8 particles in the colloidal solution are...
Embodiment 2
[0049] (1) Preparation of ZIF-8 sol:
[0050] 1) Dissolve zinc nitrate hexahydrate (1.47g) and 2-methylimidazole (3.25g) in 100ml of anhydrous methanol, respectively, to obtain a methanol solution of zinc nitrate and a methanol solution of 2-methylimidazole, respectively. The methanol solution of zinc was poured into methanol solution of 2-methylimidazole, and the solution was stirred at room temperature for 1 h.
[0051] 2) The above-mentioned reactants are centrifuged at least once so that the unreacted precursors are completely removed, and each centrifugation condition is 8000-10000rpm for 10min, and the collected precipitate is washed with methanol and dispersed in methanol after washing; further, the centrifugation condition is 8000 rpm. - Collect supernatant by centrifugation at 10000rpm for 10min to obtain ZIF-8 sol (see figure 1 ) at a concentration of 1.5 mg / mL.
[0052] Depend on figure 1 It is shown that the ZIF-8 particles in the colloidal solution are basicall...
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