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Method for preparing MOF (Metal Organic Framework) film by in-situ phase inversion method and application

A technology of MOF and conversion method, which is applied in the field of MOF thin film preparation by in-situ phase inversion method, can solve the problems of limited membrane application, high structural brittleness, poor chemical stability and thermal stability, etc., and achieves a simple and fast preparation method, excellent separation performance, good The effect of long-term stability

Pending Publication Date: 2022-04-19
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Polymer membranes are easy to prepare and have strong mechanical strength. They have been widely used in industrial gas separation, reverse osmosis and other processes. Some polymer membrane materials have poor chemical and thermal stability in pervaporation applications.
Inorganic membranes, especially zeolite membranes, have been widely used for dehydration of organic matter, but the structure is brittle, which limits the application of membranes.

Method used

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  • Method for preparing MOF (Metal Organic Framework) film by in-situ phase inversion method and application
  • Method for preparing MOF (Metal Organic Framework) film by in-situ phase inversion method and application
  • Method for preparing MOF (Metal Organic Framework) film by in-situ phase inversion method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] (1) Liquid A: Dissolve 58.5 mg of zirconium chloride and 24 mg of benzoic acid in 1.8 mL of N,N-dimethylformamide, heat at 80°C for 1 hour, and cool to room temperature; Liquid B: 36 mg of 1,4-dibromo -2,3,5,6-Tetracarboxyphenyl-substituted benzene was dissolved in 1.8mL N,N-dimethylformamide; Mix the prepared A solution, B solution and 288mg benzoic acid, and heat at 100°C for 2- 72h to obtain white powdery NU-906 particles, ready to use;

[0033] (2) After smoothing the surface of the self-made silica carrier with sandpaper, coat 50nm silica particles and calcinate at 550°C for 5 hours to obtain a silica carrier with a smooth surface;

[0034] (3) Disperse 2.5mg NU-906 seed crystals in 2.6mL N,N-dimethylformamide so that the loading capacity of a single chip is 5mg / cm 2 , assembled on a modified silica carrier by wet coating to form a dense NU-906 layer, ready for use;

[0035] (4) Place the pre-coated NU-906 carrier in a polytetrafluoroethylene liner with a scaffol...

Embodiment 2

[0045] (1) Liquid A: Dissolve 58.5 mg of zirconium chloride and 24 mg of benzoic acid in 1.8 mL of N,N-dimethylformamide, heat at 80°C for 1 hour, and cool to room temperature; Liquid B: 36 mg of 1,4-dibromo -2,3,5,6-Tetracarboxyphenyl-substituted benzene was dissolved in 1.8mL N,N-dimethylformamide; Mix the prepared A solution, B solution and 288mg benzoic acid, and heat at 100°C for 2- 72h to obtain white powdery NU-906 particles, ready to use;

[0046] (2) After smoothing the surface of the self-made silica carrier with sandpaper, coat 50nm silica particles and calcinate at 550°C for 5 hours to obtain a silica carrier with a smooth surface;

[0047] (3) Disperse 10mg NU-906 seed crystals in 2.6mL N,N-dimethylformamide so that the loading capacity of a single chip is 20mg / cm 2 , assembled on a modified silica carrier by wet coating to form a dense NU-906 layer, ready for use;

[0048] (4) Place the pre-coated NU-906 carrier in a PTFE liner with a scaffold, control the synt...

Embodiment 3

[0058] (1) Liquid A: Dissolve 58.5 mg of zirconium chloride and 24 mg of benzoic acid in 1.8 mL of N,N-dimethylformamide, heat at 80°C for 1 hour, and cool to room temperature; Liquid B: 36 mg of 1,4-dibromo -2,3,5,6-Tetracarboxyphenyl-substituted benzene was dissolved in 1.8mL N,N-dimethylformamide; Mix the prepared A solution, B solution and 288mg benzoic acid, and heat at 100°C for 2- 72h to obtain white powdery NU-906 particles, ready to use;

[0059] (2) After smoothing the surface of the self-made silica carrier with sandpaper, coat 50nm silica particles and calcinate at 550°C for 5 hours to obtain a silica carrier with a smooth surface;

[0060] (3) Disperse 40mg of NU-906 seed crystals in 2.6mL N,N-dimethylformamide to make the loading capacity of a single chip 80mg / cm 2 , assembled on a modified silica carrier by wet coating to form a dense NU-906 layer, ready for use;

[0061] (4) Place the pre-coated NU-906 carrier in a PTFE liner with a scaffold, control the synt...

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Abstract

The invention discloses a method for preparing an MOF (Metal Organic Framework) film by an in-situ phase inversion method and application, in the process, the influence of related factors such as seed loading capacity, formic acid content, synthesis time and synthesis temperature on the compactness, thickness, surface roughness and film hydrophilicity of the surface of the MOF film is explored, and meanwhile, the method is applied to ethanol / water and butanol / water separation. The ultrathin MOF membrane is successfully prepared, has excellent separation performance and good long-term stability, and is a separation technology with great potential.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a method and application of an in-situ phase inversion method for preparing MOF thin films. Background technique [0002] As an alternative technology for rectification separation, pervaporation technology has been developed as an industrially acceptable practical technology with a history of more than ten years. The consumption plays an important role, proving the reliability and competitiveness of this new membrane technology. [0003] Traditional pervaporation membrane materials include polymer membranes, ceramic membranes, zeolite membranes, etc. Polymer membranes are easy to prepare and have strong mechanical strength, and have been widely used in industrial gas separation, reverse osmosis and other processes. Some polymer membrane materials have poor chemical and thermal stability in pervaporation applications. Inorganic membranes, especially zeolite membranes, ...

Claims

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Application Information

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IPC IPC(8): B01D61/36B01D67/00C08J5/18C08L87/00
CPCB01D61/362B01D67/0006C08J5/18C08J2387/00
Inventor 吕佳绯郭翔海白鹏雒睿雯
Owner TIANJIN UNIV
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