Preparation method of metal organic framework polyamide thin-layer nano composite membrane (UiO-66/TFN)

Abstract

The invention discloses a preparation method of a metal organic framework polyamide thin-layer nano composite membrane (UiO-66 / TFN). According to the preparation method, materials comprise a polyamide thin-layer nano composite membrane (TNF), 2-methylimidazole, 2-sulfoterephthalic acid monosodium salt, zirconium dichloride (ZrCl2), 1,2,4,5-benzenetetraboxylic acid, zinc nitrate hexahydrate [Zn(NO3)<2>.6H2O], chromium trioxide (CrO3), 1,4-dioxane, sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl2), analytically pure lithium chloride (LiCl), concentrated hydrochloric acid (concentrated HCl), methanol, ultrapure water with the conductivity being less than 1.0 [mu]s / cm, MIL-101 nanoparticles and ZIF-8 nanoparticles, wherein the concentration of the 2-methylimidazole is 77.2 cm<3> / mol. According to the present invention, with the preparation method, the biological pollution resistance of a reverse osmosis membrane can be effectively improved, and the oxidation resistance can be improved, such that the reverse osmosis membrane has the long-term pollution resistance, and can maintain the excellent adsorption resistance all the time.

Description

technical field [0001] The invention belongs to the technical field of metal-organic frameworks, in particular to a preparation method of metal-organic framework polyamide thin-layer nanocomposite films (UiO-66 / TFN). Background technique [0002] Metal-organic frameworks (MOFs) are a kind of inorganic nanoparticles with a regular pore structure developed in recent years. They have shown great application prospects in membrane separation. Among them, the most successful example of MOFs in water treatment is The preparation of polyamide thin-layer composite nanomembrane (TFN), with the addition of MOF inorganic particles in the polyamide layer, can achieve the synergistic optimization of flux and rejection. [0003] However, in the long-term use process, the reverse osmosis membrane is extremely vulnerable to various pollution threats, mainly biological pollution: different materials have different defects: [0004] 1. Polyethylene glycol (PEG) is widely used as the most favo...

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Problems solved by technology

[0004] 1. Due to its good hydrophilicity, polyethylene glycol (PEG) has become the most favorable anti-protein and antibacterial material and is widely used. However, PEG itself is easily oxidized and cannot maintain good anti-pollution performance for a long time

[0005] 2. The reverse osmosis membrane modified coating is not stable, and cannot maintain excellent anti-adsorption performance during long-term operation, and most of the modification conditions are complex and harsh

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