Preparation method of MOF (metal organic framework)-loaded ZnO scale inhibition ultrafiltration membrane
A technology of ultrafiltration membrane and MOF, which is applied in the field of inorganic/organic hybrid separation, can solve the problems of poor compatibility between inorganic doped membranes and membrane materials, and achieve excellent antibacterial adhesion and separation performance, high antibacterial adhesion, good Effect of Filtration Separation Performance
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Embodiment 1
[0027] A method for preparing a metal-organic framework material MOF-supported ZnO scale-resistant ultrafiltration membrane, specifically comprising the following steps:
[0028] (1) Reaction of metal salt with sebacic acid at 130°C to obtain the desired MOF material; the metal salt is Mg(NO 3 ) 2 ·6H 2 O, Mg (NO 3 ) 2 ·6H 2 The molar ratio of O to sebacic acid was 1.3:1.
[0029] (2) Put the MOF material into 20ml of water and ethanol solvent for ultrasonic dispersion, add zinc acetate solution dropwise to the above solution, stir for a period of time, and heat the reaction at 150 °C for 10 h to promote the generation of ZnO-loaded MOF nanoparticles. Centrifuge and dry for later use; the molar ratio of MOF to zinc acetate is 100:1.
[0030] (3) Dissolve or disperse PVDF with a mass ratio of 100:1:3, a molecular weight of 200,000 g / mol, MOF-loaded zinc oxide, and a pore-forming agent in dimethylacetamide to prepare a PVDF solution with a mass fraction of 20%, Make it fu...
Embodiment 2
[0038] A method for preparing a metal-organic framework material MOF-supported ZnO scale-resistant ultrafiltration membrane, specifically comprising the following steps:
[0039] (1) Reaction of metal salt with 1,3,5-benzenetricarboxylic acid at 150°C to obtain the desired MOF material; the synthesis method is Fe powder and nitric acid, hydrofluoric acid, 1,3,5-benzenetricarboxylic acid (BTC) to synthesize MIL-Fe, the molar ratio of Fe powder to 1,3,5-benzenetricarboxylic acid (BTC) was 1.58:1.
[0040] (2) Put the MOF material into 40ml of water and ethanol solvent for ultrasonic dispersion, add zinc acetate solution dropwise to the above solution, stir for a period of time and then heat the reaction at 180 °C for 10 h to promote the generation of ZnO-loaded MOF nanoparticles, Centrifuge and dry for later use; the molar ratio of MOF to zinc acetate is 100:10.
[0041] (3) Dissolve or disperse PVDF with a mass ratio of 100:2:3, a molecular weight of 200,000 g / mol, MOF-loaded ...
Embodiment 3
[0049] A method for preparing a metal-organic framework material MOF-supported ZnO scale-resistant ultrafiltration membrane, specifically comprising the following steps:
[0050] (1) The desired MOF material was obtained by reacting the metal salt with p-hydroxybenzoic acid at 180 °C; the metal salt was Mg(NO 3 ) 2 ·6H 2 0, the molar ratio of metal salt to ligand (p-hydroxybenzoic acid) is 3:1.
[0051] (2) Put the MOF material into 60ml of water and ethanol solvent for ultrasonic dispersion, add zinc acetate solution dropwise to the above solution, stir for a period of time and then heat the reaction at 200 °C for 10 h to promote the generation of ZnO-loaded MOF nanoparticles, Centrifuge and dry for later use; the molar ratio of MOF to zinc acetate is 100:20.
[0052] (3) Dissolve or disperse PSF with a mass ratio of 100:2:3, a molecular weight of 200,000 g / mol, MOF-loaded zinc oxide, and a pore-forming agent in dimethylacetamide to prepare a PS solution with a mass fracti...
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