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Ultrathin zeolite imidazate skeleton hybrid membrane, preparation method and application thereof

A zeolite imidazolate and hybrid membrane technology, which is applied in the field of membrane separation, can solve the problems of poor membrane performance, poor compatibility between inorganic materials and organic substances, and achieve good repeatability, good gas separation performance, and good interface compatibility. Effect

Active Publication Date: 2017-06-13
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of poor compatibility between inorganic materials and organic matter in organic-inorganic hybrid membranes in the prior art, resulting in a two-phase gap in the prepared hybrid membrane and poor membrane performance, the present invention intends to prepare an ultra-thin zeolite imidazolate framework Hybrid membrane

Method used

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  • Ultrathin zeolite imidazate skeleton hybrid membrane, preparation method and application thereof
  • Ultrathin zeolite imidazate skeleton hybrid membrane, preparation method and application thereof
  • Ultrathin zeolite imidazate skeleton hybrid membrane, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Zn 2 (bim) 4 Preparation of Nanosheet @OPBI Hybrid Membrane Ⅰ:

[0029] ① Add Zn 2 (bim) 4 Nanosheets dispersed in methanol to form a dispersion, Zn 2 (bim) 4 The nanosheet concentration was 0.04 mg / mL.

[0030] ② Dissolve OPBI in N,N-dimethylacetamide to prepare a polymer solution with a concentration of 0.05 wt%.

[0031] ③α-Al 2 o 3 The porous carrier was placed on a heating platform at 120°C, and the Zn 2 (bim) 4 The nanosheet / methanol dispersion was dropped on its surface drop by drop (with 5.9mL dispersion / cm 2 carrier), and dried for 1 hour.

[0032] ④ Transfer the carrier to the platform at room temperature, add OPBI polymer solution drop by drop (at 0.024mL polymer solution / cm 2 carrier), dried at 70°C for one hour,

[0033] ⑤Repeat steps ③ and ④ for 2 drops to make film.

[0034] Scanning electron micrographs ( figure 1 ) shows that the polymer layer is very thin, and the morphology of the nanosheets can be clearly seen. The scanning electron m...

Embodiment 2-3

[0036] According to the same method in Example 1, two repeated parallel experiments were carried out, and two Zn 2 (bim) 4 Nanosheet @OPBI hybrid membranes are numbered hybrid membrane i, hybrid membrane ii and hybrid membrane iii, respectively.

Embodiment 4

[0038] Zn 2 (bim) 4 Preparation of Nanosheet@OPBI Hybrid Membrane Ⅱ

[0039] ① Add Zn 2 (bim) 4 Nanosheets dispersed in methanol to form a dispersion, Zn 2 (bim) 4 The nanosheet concentration was 0.04 mg / mL.

[0040]② Dissolve OPBI in N,N-dimethylacetamide to prepare a polymer solution with a concentration of 0.02wt%.

[0041] ③ Zn 2 (bim) 4 The nanosheet / methanol dispersion was added dropwise on α-Al at 120 °C 2 o 3 Porous carrier surface (with 5.9mL dispersion / cm 2 Carrier), dried at 60°C for 12 hours, and dried at 60°C under vacuum for 12 hours.

[0042] ④ Pull a thin layer of polymer solution on the surface of the alumina carrier loaded with nanosheets by dipping and pulling. Number of pulls: 1 time, then the film was dried at room temperature for 48 hours, transferred to a 70°C oven for 12 hours, 150°C for 12 hours, and 150°C for 12 hours under vacuum.

[0043] X-ray diffraction spectrum ( Figure 4 ) The peak near 9° is the characteristic peak of nanosheets...

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Abstract

The invention discloses an ultrathin zeolite imidazate skeleton hybrid membrane, a preparation method and application thereof. The hybrid membrane adopts ultrathin zeolite imidazate skeleton nanosheets to be dispersed into an organic solvent, a membrane is firstly formed on the surface of a carrier, and then a polymer membrane is formed on the membrane, so that the hybrid membrane is formed after 1 to 10 times of membrane formation. The ultrathin zeolite imidazate skeleton nanosheets in the zeolite imidazate skeleton hybrid membrane prepared in the invention and an organic polymer are of good interfacial compatibility, so that the hybrid membrane has extremely high gas separation performance. The hybrid membrane disclosed by the invention is simple in synthetic method and high in repeatability, and can be applied to various complex carriers.

Description

technical field [0001] The invention belongs to the field of membrane separation, and in particular relates to an ultrathin zeolite imidazolate framework hybrid membrane, its synthesis and application. Background technique [0002] Energy saving and emission reduction technology is one of the keys to achieve sustainable development and environmental friendliness. The separation process accounts for 40% to 60% of the total energy consumption of the process industry, so the energy saving and emission reduction of the separation process has become one of the key concerns of global scientific researchers. Membrane separation has significant advantages such as low energy consumption, high separation efficiency, easy operation, and low carbon emissions. It can be used in many fields such as gas separation, seawater desalination, water pollution control, and pharmaceuticals. The gas separation membrane market is currently dominated by polymer membranes, but their thermal stability...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D67/00B01D69/10B01D69/02B01D53/22
CPCB01D53/228B01D67/0016B01D67/0088B01D69/02B01D69/10B01D71/06B01D2257/504B01D2323/46Y02C20/40
Inventor 杨维慎彭媛李砚硕
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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