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Macromolecular separation film as well as preparation method and application thereof

A separation membrane and polymer technology, applied in separation methods, dispersed particle separation, semi-permeable membrane separation, etc., can solve the problem of low gas selectivity of microporous materials, achieve good processability, simple preparation method, Effect of High Gas Selectivity

Inactive Publication Date: 2018-11-23
SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with the superior gas separation performance of inorganic materials, the gas selectivity of self-porous materials is low

Method used

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  • Macromolecular separation film as well as preparation method and application thereof
  • Macromolecular separation film as well as preparation method and application thereof
  • Macromolecular separation film as well as preparation method and application thereof

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preparation example Construction

[0051] In a preferred embodiment, the preparation method comprises:

[0052] Dissolving the self-porous polymer in a solvent to obtain a polymer solution;

[0053] Dispersing the inorganic material in a solvent to obtain an inorganic material dispersion;

[0054]fully mixing the polymer solution and the inorganic material dispersion to obtain a blended solution;

[0055] The blended solution is coated on the polymer support layer, and then dried at 80-120° C. for 24-48 hours to obtain a polymer separation membrane.

[0056] Preferably, the concentration of the microporous polymer in the polymer solution is 0.5-20 wt%.

[0057] Preferably, the content of inorganic materials in the polymer separation membrane is 0-80wt%.

[0058] Further, the solvent includes an organic solvent.

[0059] Further, the organic solvent includes chloroform, N,N-dimethylformamide (DMF), etc., but is not limited thereto.

[0060] Preferably, the mixing method includes mechanical stirring, ultraso...

Embodiment 1

[0074] A kind of polymer separation membrane, its preparation method comprises the steps:

[0075] Dissolve 70mg of self-microporous polymer PIM-1 in chloroform solvent, make a polymer solution with a mass concentration of about 3wt%, fully dissolve, and then filter the polymer solution with a polytetrafluoroethylene filter head with a diameter of 0.45um , to remove insoluble impurities and obtain a fully dissolved polymer solution. Stir well and disperse evenly for 24 hours. Ultrasonic 30min, stand still. After standing still, the mixed solution was coated on the bottom film polyvinylidene fluoride (PVDF) with an automatic scraping machine. After the solvent on the surface of the base film evaporated, the film was placed in a vacuum oven and dried at 120°C for 24 hours. A polymer-pure membrane with a microporous structure was obtained. Among them, the gas flux of the PIM-1 pure membrane obtained in this example to oxygen is about 1000-2000 barrer, and the gas selectivity ...

Embodiment 2

[0077] A kind of polymer separation membrane, its preparation method comprises the steps:

[0078] Dissolve 70mg of self-microporous polymer PIM-1 in chloroform solvent, make a polymer solution with a mass concentration of about 3wt%, fully dissolve, and then filter the polymer solution with a polytetrafluoroethylene filter head with a diameter of 0.45um , to remove insoluble impurities and obtain a fully dissolved polymer solution. The dispersed phase of inorganic materials such as metal-organic framework materials NH 2 - UiO-66, the particle size is about 60-80nm, after successful preparation, it is dispersed in the solvent chloroform to obtain a dispersed phase system. Then take a certain amount of dispersed phase system and add it into the polymer solution, wherein the mass ratio of the polymer phase and the inorganic material phase is 2:1, that is, the mass fraction of the inorganic material is about 30%. Stir well and disperse evenly for 24 hours. Ultrasonic 30min, st...

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Abstract

The invention discloses a macromolecular separation film as well as a preparation method and application thereof. The macromolecular separation film comprises a continuous phase of a polymer with a micropore structure, wherein the polymer comprises a microporous polymer and a dispersion phase containing inorganic materials; the microporous polymer comprises PIM-1 and / or PIM-1 derivatives. The preparation method comprises the following steps of uniformly mixing the microporous polymer and the inorganic materials into a solvent to obtain a blended solution; coating the blended solution onto a polymer support layer to obtain a macromolecular separation film. The composite gas separation film maintains good mechanical performance, thermal stability and processing performance of the polymer materials and good gas selection performance of inorganic materials, and has the advantages of high seepage performance and high selectivity during mixed gas separation, particularly oxygen gas and nitrogen gas separation; the preparation method is simple; the method is suitable for scaled industrial production; the potential application prospects are realized in the aspects of rich-oxygen, namely oxygen gas enriching application.

Description

technical field [0001] The invention relates to a gas separation membrane, in particular to a high-flux, high-selectivity polymer separation membrane for gas separation and its preparation method, as well as its application in oxygen enrichment, i.e. oxygen enrichment, belonging to gas Separation of technical fields. Background technique [0002] As the contradiction between tightening energy supply and rising energy prices gradually emerges, efficient utilization of energy has become a subject of concern in scientific research and industry. Oxygen-enriched separation technology is to use physical or chemical methods to collect oxygen in the air to increase the oxygen content in the air. It has a wide range of applications in industrial production and daily life. The serious pollution of the atmospheric environment and the strengthening of the concept of environmental protection and high efficiency provide a good opportunity for the development and market scale of oxygen-en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/76B01D69/12B01D69/02B01D67/00B01D53/22
CPCB01D53/228B01D67/0079B01D69/02B01D69/12B01D71/76
Inventor 靳健任会婷张丰
Owner SUZHOU INST OF NANO TECH & NANO BIONICS CHINESE ACEDEMY OF SCI
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