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Method for preparing polyimides microporous separation membrane

A polyimide, separation membrane technology, applied in semi-permeable membrane separation, chemical instruments and methods, membrane technology, etc., to achieve the effect of short production cycle, simple process flow and high filtration efficiency

Inactive Publication Date: 2007-10-17
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At present, there is no relevant report on the use of templates to cover polyimide polymer films for electron beam irradiation, and then to prepare them by etching.

Method used

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Experimental program
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Effect test

Embodiment 1

[0023] The technological process and steps of the present embodiment are as follows:

[0024] (1) First prepare H with deionized water 2 SO 4 and K 2 Cr 2 o 7 The etching mixed solution, in which H 2 SO 4 The concentration of the solution is 8mol / L, K 2 Cr 2 o 7 The concentration of the solution is 0.2mol / L;

[0025] (2) Cover the metal template with the microhole pattern on the polymer polyimide film, and then use a conventional electron accelerator to irradiate under the electron beam irradiation produced by the electron accelerator. 900KGy;

[0026] (3) The irradiated polyimide film is pre-treated by pickling and alkali washing, and then it is immersed in the above-mentioned prepared etching mixed solution; etching is carried out at a temperature of 90 ° C, and the time of controlling the etching reaction is 9 hours;

[0027] (4) Wash the etched polyimide film with deionized water, and then put it in a drying oven to dry; after drying, a polymer polyimide microp...

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PUM

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Abstract

The invention relates to a method for irradiating the dosage polyimide micropore separating membrane using electron beam, and to the technology field of radiation chemistry and macromolecule membrane treatment. The method of the invention uses the polyimide membrane synthesized by polymerizing various of monomers as the main membrane material, on which metalform with micropore pattern is covered, and irradiates by high energy electron beam product by regular electron accelerator; the irradiation dose is 600-1200KGy; and then it is immerged into the mixed comprising H2SO4 and K2Cr2O7, wherein the concentration of H2SO4 solution is 6-10 mol / L, and the concentration of K2Cr2O7 solution is 0.1-0.3 mol / L; etching is done under the temperature of 60-90 degree C for 5-10 hours; lastly, clean and dry to get the macromolecule polyimide micropore separating membrane with the pattern arranged clear and neat and consistent aperture.

Description

technical field [0001] The invention relates to a preparation method of a polyimide microporous separation membrane, which mainly adopts electron beam irradiation technology, and belongs to the technical field of radiation chemistry and polymer film material processing. Background technique [0002] In today's world where energy and water resources are in short supply, and water and environmental pollution are becoming more and more serious, the research on membrane separation science and technology has been highly valued by countries all over the world. In the past 30 years, membrane technology has achieved extremely rapid development, and has been widely and effectively used in petrochemical, pharmaceutical, biochemical, environmental, energy, electronics, metallurgy, light industry, food, aerospace, seawater (brackish water) desalination , medical care and other fields (especially closely related to energy conservation, environmental protection, water resources developmen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/46B01D67/00
Inventor 周瑞敏吴新锋郝旭峰周菲王智涛贵舜延邓邦俊
Owner SHANGHAI UNIV
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