Synthetic method of metal organic skeleton membrane

A technology of metal organic framework and synthesis method, applied in the field of synthesis of novel metal organic framework films, can solve the problems of difficulty in preparing continuous and dense metal organic framework films, easy detachment of crystal seeds, complex seed preparation and coating steps, etc. , to achieve good application value and prospects, wide versatility, enhanced hardness and compressive strength

Active Publication Date: 2015-10-07
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method requires complex seed crystal preparation and coating steps, and the seed crystals on the substrate are easy to fall off during the synthesis process, making it difficult to prepare continuous and dense metal-organic framework films (Li et al, Angew.Chem.Int.Ed. ,2010,49,548.)

Method used

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  • Synthetic method of metal organic skeleton membrane
  • Synthetic method of metal organic skeleton membrane
  • Synthetic method of metal organic skeleton membrane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The substrate is polyethersulfone hollow fiber membrane, the metal gel is zinc gel, and the synthesized metal organic framework membrane is polyethersulfone / ZIF-8 membrane.

[0035] Preparation:

[0036] (1) Preparation of polyethersulfone hollow fiber membrane containing zinc gel: Zinc gel was prepared by sol-gel method, zinc acetate (5.2g, 0.0237mol) was added to ethanol (15mL) and heated at 60°C After stirring for 30 min, ethanolamine (1.5 mL) was added, and the reaction was stirred at 60°C for 10 min to obtain a transparent zinc sol without precipitation, which was left at room temperature for use. Put the polyethersulfone hollow fiber membrane into the zinc sol, ultrasonically vibrate for 10 minutes, take out the membrane containing the zinc sol, and dry it at 150° C. for 2 hours to obtain the polyethersulfone hollow fiber membrane containing the zinc gel ( figure 1 Its SEM picture), standby.

[0037] (2) Synthesis of polyethersulfone / ZIF-8 membrane: put the polyet...

Embodiment 2

[0040] The substrate is polyvinylidene fluoride hollow fiber membrane, the metal gel is zinc gel, and the synthesized metal organic framework membrane is polyvinylidene fluoride / ZIF-8 membrane.

[0041] Preparation:

[0042] (1) Preparation of polyvinylidene fluoride hollow fiber membrane containing zinc gel: Zinc gel was prepared by sol-gel method, and zinc acetate dihydrate (3.475g, 0.0158mol) was added to ethylene glycol ether (50mL) , stirred at 50°C for 30min, then added ammonia water (0.5mL), and stirred at 50°C for 10min to obtain a transparent zinc sol without precipitation, which was left at room temperature for use. Put the polyvinylidene fluoride hollow fiber membrane into the zinc sol, soak for 60 minutes, take out the membrane containing the zinc sol, and dry it at 60°C for 4 hours to obtain a polyvinylidene fluoride hollow fiber membrane containing zinc gel, which is ready for use.

[0043] (2) Synthesis of polyvinylidene fluoride / ZIF-8 membrane: put the polyvin...

Embodiment 3

[0045] The substrate is polysulfone flat membrane, the metal gel is copper gel, and the synthesized metal-organic framework membrane is polysulfone / CuBTC membrane.

[0046] Preparation:

[0047] (1) Preparation of polysulfone flat membrane containing copper gel: Copper gel was prepared by sol-gel method, copper acetate (3.154g, 0.0158mol) was added to ethylene glycol ether (50mL) and heated at 50°C Stir at low temperature for 60 min, then add ethylenediamine (0.5 mL), and stir at 50°C for 10 min to obtain a blue copper sol without precipitation, which is left at room temperature for use. Put the polysulfone flat membrane into the copper sol, soak for 10 minutes, take out the membrane containing the copper sol, and dry it at 180°C for 2 hours to obtain a polysulfone flat membrane containing copper gel, which is ready for use.

[0048] (2) Synthesis of polysulfone / CuBTC membrane: put the polysulfone flat membrane containing copper gel obtained in step (1) into the prepared synt...

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Abstract

The invention provides a synthetic method of a metal organic skeleton membrane. Firstly, metal salt A is added to a solvent A, so as to be mixed and dispersed, then a stabilizing agent is added to mix and react, so as to obtain metal-sol, a substrate is immersed in the metal-sol for soaking or ultrasonic shaking for 5 to 60 min, and then the substrate is taken out and dried for 2 to 4 h at 60 to 180 DEG C, so as to obtain the substrate containing the metal-sol; then organic ligands, metal salt B and a solvent B are mixed and uniformly stirred, so as to obtain a synthetic solution; subsequently, the substrate containing the metal-sol is immersed in the synthetic solution for solvothermal synthesis, and a synthetic membrane is taken out, flushed and dried after a reaction system is cooled, so as to obtain the metal organic skeleton membrane. According to the synthetic method, the continuous dense metal organic skeleton membrane can be obtained, and metal organic skeleton materials are synthesized in a duct, so as to increase the rigidity and compressive strength of the membrane; the synthetic method is suitable for substrates of various materials and configurations and has the advantage of wide application prospect.

Description

(1) Technical field [0001] The invention belongs to the technical field of new functional materials, and mainly provides a method for synthesizing a novel metal-organic framework membrane. (2) Background technology [0002] In recent years, with the rapid development of the economy, natural gas, oil, coal, etc. have been consumed in large quantities, and the energy crisis has gradually emerged. At the same time, the extensive use of fossil fuels has caused serious environmental pollution. Energy conservation, emission reduction, and low-carbon environmental protection have become new trends in industrial production. Require. Compared with traditional separation technology, membrane separation has very significant advantages, such as low energy consumption, simple operation and no secondary pollution. The choice of membrane material is a key factor in the membrane separation process, which determines the separation effect and service life of the membrane. At present, organi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/06B01D71/68B01D71/42B01D71/34B01D69/10B01D67/00
Inventor 张国亮苏鹏程张从阳
Owner ZHEJIANG UNIV OF TECH
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