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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

Inactive Publication Date: 2018-11-23
QUANZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing a ZnO scale-inhibiting ultrafiltration membrane supported by a metal-organic framework material, which solves the problem of poor compatibility between inorganic doped membranes and membrane materials. The ultrafiltration membrane provided by the present invention has excellent Antimicrobial Adhesion and Release Properties

Method used

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  • Preparation method of MOF (metal organic framework)-loaded ZnO scale inhibition ultrafiltration membrane
  • Preparation method of MOF (metal organic framework)-loaded ZnO scale inhibition ultrafiltration membrane
  • Preparation method of MOF (metal organic framework)-loaded ZnO scale inhibition ultrafiltration membrane

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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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Abstract

The invention relates to a preparation method of MOF (metal organic framework)-loaded ZnO scale inhibition ultrafiltration membrane and belongs to the technical field of inorganic / organic hybridization and separation. The method comprises the following steps: metal salt and ligand are taken as raw materials to prepare MOF under a hydrothermal reaction condition; the MOF and zinc salt are mixed andcalcined to produce an MOF-loaded ZnO; the MOF-loaded ZnO and membrane materials are mixed to prepare a membrane casting solution; and the membrane casting solution is used to prepare the MOF-loadedZnO scale inhibition ultrafiltration membrane in a plurality of methods. In particular, the MOF-loaded ZnO can be prepared using a one-pot method characterized by a simple production process and easyoperation. The MOF-loaded ZnO scale inhibition ultrafiltration membrane has a high anti-bacterial performance and an anti-adhesion of 80-90% to bacteria separated from wastewater; besides, the MOF-loaded ZnO scale inhibition ultrafiltration membrane has a sound filtering separation performance and can retain over 95% of bovine serum albumin; the MOF-loaded ZnO scale inhibition ultrafiltration membrane can stably exist in air and water; the MOF-loaded ZnO scale inhibition ultrafiltration membrane is recyclable; the MOF-loaded ZnO scale inhibition ultrafiltration membrane is environment-friendlyand non-corrosive.

Description

technical field [0001] The invention belongs to the technical field of inorganic / organic hybrid separation, and in particular relates to a preparation method and an application of a ZnO antiscaling ultrafiltration membrane supported by metal organic framework material MOF. Background technique [0002] ZnO-doped ultrafiltration membranes are known as antibacterial membranes, and they can be fabricated by various processes. CN201710974986.6 discloses a method and device for advanced wastewater treatment of PVDF / ZnO piezoelectric ultrafiltration membrane coupled with advanced oxidation technology. PVDF / ZnO piezoelectric ultrafiltration membrane realizes self-cleaning effect under the action of AC power and overcomes membrane filtration technology The problem that small molecule pollutants cannot be effectively removed and advanced oxidation technology cannot effectively oxidize macromolecular pollutants. CN105833742A In the preparation and characteristic research of doped nan...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D71/34B01D71/48
CPCB01D67/0079B01D69/02B01D71/34B01D71/48
Inventor 李清彪徐文涛张国亮徐泽海庄华强
Owner QUANZHOU NORMAL UNIV
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