Click chemistry based metal-organic framework cross-linking membrane and preparation method and application thereof

A metal-organic framework and chemical cross-linking technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problem of affecting membrane performance, poor compatibility between MOFs materials and organic materials, MOFs membranes Hard materials and other problems, to avoid pollution and removal problems, good selective separation effect, excellent flexibility and film-forming effect

Inactive Publication Date: 2016-06-22
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this type of membrane material has many inherent limitations and defects: 1) The matrix material must meet the environment and conditions of MOFs crystal growth. Most crystals are synthesized under solvothermal conditions, and the stability of the matrix is ​​particularly critical. 2) The stability of MOFs The choice is limited to those with mild growth conditions, 3) The obtained MOFs membrane materials are usually hard and brittle, and difficult to peel off from the substrate
This type of membrane material has many advantages and has achieved good results and devel

Method used

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  • Click chemistry based metal-organic framework cross-linking membrane and preparation method and application thereof
  • Click chemistry based metal-organic framework cross-linking membrane and preparation method and application thereof
  • Click chemistry based metal-organic framework cross-linking membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Example 1 metal organic framework NH 2 -Synthesis of UiO66

[0058] Dissolve the organic ligand 2-aminoterephthalic acid, zirconium tetrachloride, and acetic acid in N,N-dimethylformamide solvent, keep the temperature at 120°C for 24 hours, and cool down to room temperature to obtain light yellow nano-sized crystals, centrifuge, Drying; wherein the ratio of organic ligand 2-aminoterephthalic acid, zirconium tetrachloride, acetic acid and N,N-dimethylformamide solvent addition is 0.04mmol: 0.04mmol: 2mmol: 1.6ml, the obtained crystal See in description figure 1 .

Embodiment 2

[0059] Example 2 metal organic framework (NH 2 ) 2 - Synthesis of UiO67

[0060] Dissolve the organic ligand 2,2-diaminobiphenyldicarboxylic acid, zirconium tetrachloride, and acetic acid in N,N-dimethylformamide solvent, keep the temperature at 120°C for 24 hours, and cool down to room temperature to obtain yellow nanoscale crystals. Centrifuge and dry; the ratio of organic ligand 2,2-diaminobiphenyldicarboxylic acid, zirconium tetrachloride, acetic acid and N,N-dimethylformamide solvent is 0.26mmol: 0.26mmol: 447ul: 15ml , the obtained crystal morphology is shown in figure 2 .

Embodiment 3

[0061] Example 3 metal organic framework NH 2 -Synthesis of MIL-101(Al)

[0062] The organic ligand 2-aminoterephthalic acid (1.09g, 6mmol) and aluminum trichloride hexahydrate (0.96g, 4mmol) were dissolved in 20mL of DMF, placed in a crystallization axe, kept at 110°C for 16h, and then to room temperature, gray nanoscale crystals were obtained, centrifuged, washed with DMF and ethanol in sequence, and dried at 120°C for 24h to obtain NH 2 -MIL-101(Al) crystal powder, see XRD results image 3 .

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Abstract

The invention discloses a click chemistry based metal-organic framework cross-linking membrane and a preparation method and application thereof.Polymerizable double bonds are introduced into MOFs (metal-organic frameworks) through a post-synthetic modification method, and the chemical cross-linking type MOF membrane is prepared in situ by thiol-ene click reaction, so that a novel rapid efficient solvent-free method mild in conditions is provided for MOFs membrane synthesis.By means of applying the strategy, an obtained independent homogeneous MOFs hybrid membrane material is excellent in membrane forming performance and toughness, and the defects of agglomeration of MOFs crystals and poor compatibility between the MOFs and polymers are overcome.The synthesized MOFs membrane material is excellent in selective separation effect on dye molecules in water and has a promising application prospect in the field of membrane separation.

Description

technical field [0001] The invention relates to a metal-organic framework crosslinked membrane based on click chemistry, a preparation method and application thereof, and belongs to the technical field of polymer separation membranes. Background technique [0002] Metal-organic frameworks (MOFs) are a new type of porous inorganic-organic hybrid crystalline material, which is composed of metal ions or metal clusters connected with organic ligands through covalent bonds. It exhibits the characteristics of both organic and inorganic materials. High porosity, controllable channels, structural diversity, rich functionality, simple preparation, etc. These unique advantages have attracted widespread attention. MOFs membrane materials have the characteristics of high efficiency, energy saving, economy, etc., and the application range can be extended to liquid and some gaseous media, such as membrane separation, fluorescence sensing, etc., so it has attracted extensive attention. Th...

Claims

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Application Information

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IPC IPC(8): C08G81/00C08G83/00C08J3/24B01J20/22B01J20/30C02F1/44
CPCB01J20/226C02F1/44C02F2101/308C08G81/00C08G83/008
Inventor 董育斌姚丙建姜卫玲
Owner SHANDONG NORMAL UNIV
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