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Filter membrane as well as preparation method and application

A filter membrane and metal-organic framework technology, applied in the field of applied chemistry, can solve the problems of no technical methods and materials, and achieve the effect of simple and fast preparation process, high porosity, and rich surface functional groups

Active Publication Date: 2016-05-04
理工清科(北京)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the filtration of volatile organic compounds, there are currently no technical methods and materials that can be widely used in daily life.

Method used

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  • Filter membrane as well as preparation method and application
  • Filter membrane as well as preparation method and application
  • Filter membrane as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0074] Preparation of filter membrane

[0075] The contacting of the metal-organic framework material of the present invention with the polymer is carried out in a solvent.

[0076] The solvent includes at least one of water, methanol, ethanol, dimethylformamide, dimethylacetamide and diethylformamide. The inventors found that choosing dimethylformamide as a solvent can obtain a membrane with higher purity and better filtration effect.

[0077] With respect to 1 gram of the metal-organic framework material, the amount of the polymer used is 0.1-10 grams, more preferably 1-8 grams, and the amount of the solvent used is 10-100 milliliters, more preferably 15-80 milliliters.

[0078] The filter membrane of the present invention is prepared by a spinning method.

[0079] Metal-organic framework materials and polymers are spun onto non-woven fabrics, and the two interweave and grow together to obtain metal-organic framework / polymer filtration membranes. Specifically, first set t...

Embodiment 1

[0090] Disperse the metal-organic framework material (zirconium chloride as the metal source and 2-aminoterephthalic acid as the organic ligand) in the solvent dimethylformamide, then add polyacrylonitrile, and mix evenly to obtain a spinning solution. Wherein, relative to 1 gram of metal-organic framework material, the amount of polymer used is 5 grams, the amount of solvent used is 50 milliliters, the mixing temperature is room temperature, and the mixing time is 8 hours.

[0091] The above-mentioned spinning solution is spun, and the fiber is received by a non-woven fabric to obtain a filter membrane; wherein, the spinning parameters are a spinning feed rate of 3 milliliters per hour, a spinning voltage of 13 kilovolts, and a spinning distance of 20 centimeters. The spinning time is 10 minutes, and the needle type is 20G.

[0092] The filter membrane was analyzed by X-ray powder diffraction and scanning electron microscope. X-ray powder diffraction, model: BrukerD8Advance,...

Embodiment 2

[0095] The metal organic framework material (the metal source is copper acetate, and the organic ligand is trimesic acid) is dispersed in dimethylformamide, then polystyrene is added, and the spinning solution is obtained by mixing evenly. Wherein, relative to 1 gram of metal-organic framework material, the amount of polymer used is 8 grams, the amount of solvent used is 80 milliliters, the mixing temperature is room temperature, and the mixing time is 8 hours.

[0096] The above-mentioned spinning solution is spun, and the fiber is received by a non-woven fabric to obtain a filter membrane; wherein, the spinning parameters are a spinning feed rate of 5 milliliters per hour, a spinning voltage of 10 kV, and a spinning distance of 15 centimeters. The spinning time is 5 minutes, and the needle type is 20G.

[0097] The filter membrane was analyzed by X-ray powder diffraction and scanning electron microscope. The test method and test conditions were the same as in Example 1. The ...

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Abstract

The invention relates to a filter membrane, which is formed by a metal organic framework material and a polymer. The invention also provides a method for preparing the filter membrane which is formed by the metal organic framework material and the polymer. The method comprises the following steps: the metal organic framework material and the polymer are contacted, and the filter membrane is formed by spinning or dip-coating. The invention also relates to an application of the filter membrane to filtering of PM2.5 and volatile organic compounds. The filter membrane has the advantages of high specific surface area, abundant surface function groups, high amount of porosity, light transmission, ventilation, etc., and the filter membrane is used for realizing high-efficiency filtering of PM2.5 and volatile organic compounds.

Description

technical field [0001] The present invention relates to the field of applied chemistry, in particular, to a filter membrane formed by a metal organic framework material and a polymer, a method for preparing the filter membrane, and the use of the filter membrane in filtering out PM2.5 and volatile organic compounds the use of. Background technique [0002] Metal-organic frameworks are a kind of porous materials, which form a one-dimensional, two-dimensional or three-dimensional network channel structure by the interaction of metal clusters, metal oxides or metal salts with organic ligands, with high porosity, rich functional groups and orderly channels. It plays an important role in gas storage and separation, catalysis, membrane, sensing, biomedical imaging and other fields. [0003] In recent years, environmental problems have become increasingly serious, causing great harm to social development, people's lives, and ecological security. They have been highly valued by the...

Claims

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Application Information

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IPC IPC(8): B01D71/36B01D71/30B01D71/38B01D71/26B01D71/42B01D71/28B01D71/06B01D71/44B01D71/50B01D71/40B01D67/00B01D46/54B01D53/22
CPCB01D46/54B01D53/22B01D67/0002B01D71/06B01D71/26B01D71/28B01D71/30B01D71/36B01D71/38B01D71/40B01D71/42B01D71/44B01D71/50
Inventor 韩若丹
Owner 理工清科(北京)科技有限公司
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