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Self-cleaning aramid fiber film, preparation method thereof, and applications thereof in gas separation

A self-cleaning and aramid fiber technology, applied in the field of self-cleaning aramid fiber film and its preparation, can solve the problems of low reaction efficiency and poor durability, and achieve high temperature resistance, excellent performance and good molecular structure integrity. Effect

Active Publication Date: 2014-07-09
国科广化(南雄)新材料研究院有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aramid film with self-cleaning function uses fluorine-containing siloxane in the preparation process, which has the problems of low reaction efficiency and poor durability.

Method used

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  • Self-cleaning aramid fiber film, preparation method thereof, and applications thereof in gas separation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Example 1: Preparation of a self-cleaning aramid film

[0041] (1) Add KOH to dimethyl sulfoxide (DMSO), stir until KOH is completely dissolved, then add aramid II, stir at room temperature to form a 4% solution, the amount of KOH is N equivalent of aramid II 1 times. Then add PEG-1000 with 10% aramid mass to the above solution, stir evenly to form a casting film, and then vacuum degas the casting liquid for use. Then spread the casting solution on a smooth glass plate, and scrape out a 300-400um film with a scraper. The scraped film was evaporated at 20°C for 10 seconds, and then submerged into the gel in the water until the film separated from the glass plate to obtain a gel film. The gel film was soaked in water for 4 days to completely remove the porogen and solvent. Finally, it is processed at 120°C until the film is completely dry, and the aramid film is obtained.

[0042] (2) Put the aramid film prepared in (1) into the fluorine-containing epoxy resin dispersed in ...

Embodiment 2

[0046] Example 2: Preparation of a self-cleaning aramid film

[0047] (1) Add potassium tert-butoxide to N,N-dimethylformamide, stir until potassium tert-butoxide is completely dissolved, then add Aramid II, stir at room temperature to form a solution with a mass fraction of 5%, tert-butyl The amount of potassium alkoxide is 0.8 times the N equivalent in Aramid II. Then add PVP-25 with 20% aramid mass to the above solution, stir evenly to form a casting film, and then vacuum degas the casting liquid for use. Then spread the casting solution on a smooth glass plate, and scrape out a 300-400um film with a scraper. After the scraped film, the solvent was evaporated at 30°C for 30 seconds, and then submerged into the water to gel to obtain a gel film. The gel film was soaked in water for 7 days to completely remove the pore former and solvent. Finally, it is processed at 150°C until the film is completely dry, and the aramid film is obtained.

[0048] (2) Put the aramid film prepare...

Embodiment 3

[0049] Example 3: Preparation of a self-cleaning aramid film

[0050] (1) Add NaH to N-methylpyrrolidone, stir until NaH is completely dissolved, then add aramid Ⅲ, stir at room temperature to form a solution with a mass fraction of 8%, the amount of NaH is 1.5 times the N equivalent in aramid Ⅲ . Then add PEG-600 with 30% aramid mass to the above solution, stir evenly to form a casting film, and then vacuum degas the casting liquid for use. Then spread the casting solution on a smooth glass plate, and scrape out a 300-400um film with a scraper. The scraped film, evaporate the solvent at 25°C for 20 seconds, and then sink into the water to gel to obtain a gel film. The gel film is soaked in water for 7 days to completely remove the pore former and solvent. Finally, it is processed at 80°C until the film is completely dry, and the aramid film is obtained.

[0051] (2) Put the aramid film prepared in (1) into a toluene-dispersed fluorine-containing epoxy resin (preparation is the ...

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PUM

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Abstract

The invention belongs to the technical field of aramid fiber film preparation, and discloses self-cleaning aramid fiber film, a preparation method thereof, and applications thereof in gas separation. The method includes steps of: adding aramid fiber into a mixed solution of an organic solvent and a strong alkali, stirring to obtain a uniform solution, adding a pore-forming agent, stirring and degassing, casting on a substrate to form film, immersing the film together with the substrate into water, allowing the film to gel in water and be separated from the substrate so as to obtain gel film, drying the gel film to obtain aramid fiber film, dipping the prepared aramid fiber film into fluorine-containing epoxy resin dispersed by a solvent, taking the aramid fiber film out, and heating the aramid fiber film to obtain the self-cleaning aramid fiber film. A film casting liquid is prepared by dispersing the aramid fiber through the strong alkali, and then the aramid fiber film is prepared by a solution phase transfer method, thus maintaining the good molecular structure integrity of the aramid fiber, and preserving inherent performances of the aramid fiber, thus as high-temperature resistance, solvent tolerance and high strength. Then the fluorine-containing epoxy resin is grafted into the aramid fiber film to obtain the aramid fiber film with hydrophobicity or amphiphobicity, thus obtaining the self-cleaning aramid fiber film.

Description

Technical field [0001] The invention belongs to the technical field of aramid membrane preparation, and in particular relates to a self-cleaning aramid membrane, a preparation method thereof, and an application in gas separation. Background technique [0002] Since 1960, Leob and Sourirjan used cellulose acetate to prepare a high flux and high rejection reverse osmosis membrane for the desalination of brackish water. Membrane separation technology has developed rapidly in recent decades. As a new technology for efficient separation, purification, concentration and purification, membrane separation technology has the advantages of convenient operation, simple equipment, safe working environment, energy saving and environmental protection. So far, it has been widely used in seawater desalination, organic matter concentration, gas separation, etc. field. [0003] As an important part of membrane separation technology, gas separation membrane has the advantages of economy, convenience...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56B01D69/02B01D53/22
Inventor 胡继文吴艳胡盛逾涂园园刘锋刘国军林树东杨洋苗磊李妃
Owner 国科广化(南雄)新材料研究院有限公司
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