Polyimide filter membrane, and preparation method and application thereof

A polyimide, filter membrane technology, applied in separation methods, chemical instruments and methods, membrane technology and other directions, can solve the problems of high retention rate of fine particle pollutants, small pore size, fiber shedding, etc., and achieve smooth material surface, The effect of dense structure and strong bonding force

Inactive Publication Date: 2017-01-04
PEKING UNIV SHENZHEN GRADUATE SCHOOL +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a polyimide filter membrane, aiming to solve the problem that the existing air purification materials cannot simultaneously meet the requirements of small pore size, high retention rate of fine particle pollutants, not easy to cause fiber shedding, and low price.

Method used

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  • Polyimide filter membrane, and preparation method and application thereof
  • Polyimide filter membrane, and preparation method and application thereof
  • Polyimide filter membrane, and preparation method and application thereof

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preparation example Construction

[0033] Correspondingly, the embodiment of the present invention also provides a method for preparing a polyimide filter membrane, comprising the following steps:

[0034] S01. Compound B and Compound C shown in the following chemical structural formulas (II) and (III) are provided respectively:

[0035]

[0036] S02. Under an inert environment, the compound B and the compound C are heated and polymerized in an organic solvent to obtain a compound A polyimide, and the number average molecular weight of the compound A is 80000-100000, and the reaction formula is as follows:

[0037]

[0038] S03. Prepare a polyimide filter membrane from the polyimide by electrospinning,

[0039] Among them, the for One of the structural formulas.

[0040] Specifically, in the above step S01, the compound B and compound C can be obtained by self-preparation or commercial purchase. Preferably, the compound B is obtained by self-preparation. Specifically, the compound B is prepared by ...

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Abstract

The invention is applicable to the technical field of membraneous materals, and provides a polyimide filter membrane, and a preparation method and application thereof. The polyimide filter membrane is composed of compounds A disclosed as the chemical structural formula (I) in the specification, wherein the number-average molecular weight of the compounds A is 80000-100000. In the chemical structural formula (I), Ar is disclosed as one of the structural formulae in the specification. The polyimide filter membrane provided by the invention has the advantages of small pore size and high entrapment rate for fine particles in air. The polyimide filter membrane material has the characteristics of high compactness and smooth surface; and the formed fibers can not easily shed and have favorable stability. Besides, the polyimide filter membrane is low in cost, and is only less than one-fifth of the price of the same mass of commercially available sampled filter membrane.

Description

technical field [0001] The invention belongs to the technical field of thin film materials, and in particular relates to a polyimide filter membrane, its preparation method and application. Background technique [0002] my country is one of the areas with the most serious fine particle pollution in the world. According to the data released by NASA in 2010, it shows that the PM in North China and Central China 2.5 The concentration even exceeds that of the Sahara Desert. In recent years, severe smog has occurred in many areas of our country, which has also made our government and people pay more and more attention to fine particle pollution. Therefore, it has become a topic of daily concern to select a suitable multi-air filter membrane for accurate sampling and analysis of fine particle pollutants, and to use suitable filter materials to isolate fine particle pollutants in the air. According to the regulations of the Ministry of Environmental Protection, PM in the atmosphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/64B01D69/02B01D67/00B01D46/54G01N1/22
Inventor 吴爱华赵卓于广河居学成栾胜基
Owner PEKING UNIV SHENZHEN GRADUATE SCHOOL
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