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Preparation method for high-performance metal organic framework film

A metal-organic framework, high-performance technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., to achieve uniform pore size distribution, easy operation, and increase the effect of heterogeneous nucleation points

Inactive Publication Date: 2012-07-18
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the sheet-shaped carrier, the tubular shape has a large surface area, is easy to assemble into components, and has higher industrial use value, but the force field brought by the geometrical characteristics of the tubular shape is unfavorable for the adhesion of the film on its surface. Makes it more challenging to synthesize high-quality robust membranes on the surface of large-pore tubular supports

Method used

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  • Preparation method for high-performance metal organic framework film
  • Preparation method for high-performance metal organic framework film
  • Preparation method for high-performance metal organic framework film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1α-Al 2 o 3 Preparation of modified ZIF-8 membrane

[0027] Al with an average pore size of 2-3 μm 2 o 3 Polish the outer surface of the tubular carrier with 800# and 1200# sandpaper in turn until the surface of the carrier is smooth, soak in acid and alkali for 24 hours, then use ultrasonic vibration to wash away the residual alkali in the hole, then wash it with deionized water until it is neutral, and then dry it naturally , Finally, after calcining at a high temperature of 550°C for 6 hours, seal the two ends.

[0028] N 2 Under protection, weigh 5 g of α-Al with a pore size of 0.5-0.6 μm 2 o 3 Add 150ml of anhydrous toluene, heat to 120°C and add 4ml of APTES to react for 24 hours. After the reaction is completed, add 100ml of water to sonicate for 10 minutes and let it stand for 30 minutes. Remove the toluene in the upper layer and centrifuge at 8000 rpm for 5 minutes. After washing twice, put it in 50 °C drying in an oven to obtain silane coupling ...

Embodiment 2

[0033] The preparation of the ZIF-8 film of embodiment 2NaA modification

[0034] The average pore size is 2-3μm Al 2 o 3 Polish the outer surface of the tubular carrier with 800# and 1200# sandpaper in turn until the surface of the carrier is smooth, soak in acid and alkali for 24 hours, then use ultrasonic vibration to wash away the residual alkali in the hole, then wash it with deionized water until it is neutral, and then dry it naturally , Finally, after calcining at a high temperature of 550°C for 6 hours, seal the two ends.

[0035] N 2 Under protection, weigh 5g of NaA with a pore size of 2μm and add it to 150ml of anhydrous toluene. After heating to 120°C, add 4ml of APTES to react for 24h. After the reaction is completed, add 100ml of water and ultrasonic for 10min. Centrifuge for 5 minutes, wash twice with water, and then dry in an oven at 50°C to obtain silane coupling agent-formed inorganic particles I.

[0036] The silane coupling agent-modified inorganic par...

Embodiment 3

[0040] Example 3α-Al 2 o 3 Preparation of modified ZIF-7 membrane

[0041] Al with an average pore size of 2-3 μm 2 o 3 Polish the outer surface of the tubular carrier with 800# and 1200# sandpaper in turn until the surface of the carrier is smooth, soak in acid and alkali for 24 hours, then use ultrasonic vibration to wash away the residual alkali in the hole, then wash it with deionized water until it is neutral, and then dry it naturally , Finally, after calcining at a high temperature of 550°C for 6 hours, seal the two ends.

[0042] N 2 Under protection, weigh 5 g of α-Al with a pore size of 0.5-0.6 μm 2 o 3 Add 150ml of anhydrous toluene, heat to 120°C and add 4ml of APTES to react for 24 hours. After the reaction is completed, add 100ml of water to sonicate for 10 minutes and let it stand for 30 minutes. Remove the toluene in the upper layer and centrifuge at 8000 rpm for 5 minutes. Wash twice and place at 50°C Dry in an oven to obtain silane coupling agent-based...

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Abstract

The invention provides a preparation method which is simple and easy to operate and is used for loading an MOFs (Metal-organic Frameworks) material on a big-pore tubular carrier to prepare a continuous and compact non-crack MOFs thin film, and solves the difficult problems that the MOFs material has few nucleation sites on the surface of the organic carrier and is difficult to form the film, particularly, the MOFs material has a large defect on the surface of the big-pore carrier and a pure chemical method cannot achieve the effect of uniformly modifying. The method combines chemical modification with pore blockage, so that the pore diameter distribution on the surface of the carrier is more uniform and the out-of-phase nucleation sites of the MOFs material on the surface of the carrier are greatly increased, and thus, the preparation of the continuous and compact non-crack MOFs thin film on the tubular carrier becomes possible, the continuous and compact non-crack MOFs thin film with the effect of separating small molecular gas is successfully prepared on the surface of the big-pore tubular carrier, and the MOFs material has a wide prospect when being applied to the film engineering.

Description

technical field [0001] The invention relates to a method for preparing a metal-organic framework membrane, in particular to a method for preparing a dense, continuous and crack-free metal-organic framework membrane on the surface of a macroporous carrier. Background technique [0002] The remarkable features of membrane science and technology are energy saving, clean, high efficiency, and strong compatibility. It is suitable for modern industry's needs for energy saving, raw material reuse and elimination of environmental pollution, and has become an important part of the sustainable economic development strategy. Due to its excellent thermal and chemical stability and potential molecular sieving performance for efficient separation at the molecular level, inorganic microporous membranes can be widely used in medium and high temperature catalytic reactions in harsh operating environments in petrochemical industry, separation of biochemical products, organic chemical industry ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/00B01D67/00
Inventor 杨建华谢忠王金渠殷慧敏白菊袁冰张艳鲁金明
Owner DALIAN UNIV OF TECH
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