Preparation method of zeolite imidazolate framework/polyvinylidene fluoride hybrid film
A polyvinylidene fluoride, zeolite imidazolate technology, applied in chemical instruments and methods, membranes, membrane technology and other directions, can solve the problems of numerous steps, complex preparation methods, etc., and achieves controllable pores, simplifies the membrane-making process, and has high efficiency. Effect
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Embodiment 1
[0031] Preparation of ZIF-67 solution:
[0032] Put 0.249g of cobalt nitrate hexahydrate (0.856mmoL) and 25.0mL of methanol into an Erlenmeyer flask, seal it and stir to obtain a methanol solution of cobalt nitrate hexahydrate.
[0033] Put 0.281g of 2-methylimidazole (3.42mmoL) and 25.0mL of methanol into an Erlenmeyer flask, stir and mix well, and sonicate for 30min to obtain a methanol solution of 2-methylimidazole. Then the methanol solution of 2-methylimidazole is mixed with the methanol solution of cobalt nitrate hexahydrate, stand for 24h, draw the upper clear night with a dropper, and centrifuge with a centrifuge. The rotating speed of the centrifuge is 8000r / min, and the centrifugation time is After 30 min, ZIF-67 was obtained after centrifugation. Scanning electron microscope (SEM) image of ZIF-67 figure 1 ,from figure 1 It can be seen that ZIF-67 has uniform size and good monodispersity. image 3 It can be seen from the XRD pattern of ZIF-67 in ZIF-67 that the d...
Embodiment 2
[0039] The preparation of ZIF-67 solution: same as embodiment 1
[0040] Preparation of zeolite imidazolate framework / polyvinylidene fluoride hybrid membrane 2:
[0041] (1) Put polyvinylidene fluoride into polyvinyl alcohol solution after drying and soak for 12 hours;
[0042] (2) Put soaked polyvinylidene fluoride in polyethyleneimine solution for 2 hours, wash it once with deionized water, then put it into ZIF-67 solution for 1 hour, wash it with deionized water once, and finally put it in Immerse in a polyacrylic acid solution for 1 hour to obtain a zeolite imidazolate framework / polyvinylidene fluoride hybrid membrane 2 .
Embodiment 3
[0044] The preparation of ZIF-67 solution: same as embodiment 1
[0045] Preparation of zeolite imidazolate framework / polyvinylidene fluoride hybrid membrane 3:
[0046] (1) After drying the polyvinylidene fluoride, put it into the polyvinyl alcohol solution and soak it for 24 hours;
[0047] (2) Put the soaked polyvinylidene fluoride in polyethyleneimine solution for 4 hours, wash it once with deionized water, then put it into ZIF-67 solution for 2 hours, wash it with deionized water once, and finally put it in Immerse in polyacrylic acid solution for 2 hours to obtain zeolite imidazolate framework / polyvinylidene fluoride hybrid membrane 3.
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