Method for preparing silane cross-linked MOFs separation membrane
A silane cross-linking and separation membrane technology, which is applied in separation methods, semipermeable membrane separation, and dispersed particle separation, can solve problems such as easy shedding and defects, and achieve low cost, high temperature resistance, and simple preparation process Effect
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Embodiment 1
[0052] (1) Preparation of the first mixed solution: N, N-dimethylpyrrolidone, terephthalic acid, zirconium tetrachloride are mixed according to the molar ratio of 480:1:1 and fully stirred to obtain the MOFs film preparation required solution;
[0053] (2) Preparation of MOFs material: Put the MOFs preparation solution into the reactor, seal the reactor, add nitrogen protection to discharge water vapor and oxygen. Then put it into a heater at 120° C. under a pressure of 0.1 MPa, and conduct a solvothermal reaction for 48 hours. After the reaction was completed, the reacted solution and crystals were taken out, and the unpolymerized monomer and solvent in the MOFs adsorbent were washed with ethanol for 3 times to obtain a pure MOFs material.
[0054] (3) Formation of MOFs deposition layer:
[0055] (3A) The polyvinylidene fluoride (PVDF) flat ultrafiltration membrane with a pore size of 500nm is made into a plate and frame assembly, and then the surface and internal pollutant...
Embodiment 2
[0063] (1) Preparation of the first mixed solution: N, N-dimethylpyrrolidone, terephthalic acid, zirconium tetrachloride are mixed according to the molar ratio of 100:1:1 and fully stirred to obtain the MOF film preparation required solution;
[0064] (2) Preparation of MOFs material: Put the MOFs preparation solution into the reactor, seal the reactor, add nitrogen protection to discharge water vapor and oxygen. Then put it into a heater at 200° C. under a pressure of 0.1 MPa, and perform a solvothermal reaction for 2 hours. After the reaction is completed, the reacted solution and crystals are taken out, and the unpolymerized monomer and solvent in the MOFs adsorbent are washed with ethanol several times to obtain a pure MOFs material.
[0065] (3) Formation of MOFs deposition layer:
[0066] (3A) The polytetrafluoroethylene tubular microfiltration membrane is made into a module with a pore size of 1000 nm, and then the surface and internal pollutants of the carrier (membr...
Embodiment 3
[0074] (1) Preparation of the first mixed solution: N, N-dimethylpyrrolidone, terephthalic acid, zirconium tetrachloride are mixed according to the molar ratio of 1000:1:1 and fully stirred to obtain the required MOFs film preparation solution;
[0075] (2) Preparation of MOFs material: Put the MOFs preparation solution into the reactor, seal the reactor, add nitrogen protection to discharge water vapor and oxygen. Then put it into a heater at 120° C. under a pressure of 0.2 MPa, and perform a solvothermal reaction for 48 hours. After the reaction is completed, the reacted solution and crystals are taken out, and the unpolymerized monomer and solvent in the MOFs adsorbent are washed with ethanol several times to obtain a pure MOFs material.
[0076] (3) Formation of MOFs deposition layer:
[0077] (3A) The polytetrafluoroethylene tubular microfiltration membrane is made into a module with an average pore size of 500 nm, and then the surface and internal pollutants of the car...
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