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A polysulfone porous membrane responsive to temperature and acidity and its preparation method and application

An acidity-responsive, porous membrane technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of high cost, high operating conditions, adverse effects of basement membrane, etc., and achieve strict and reliable structure control, simple operation and low cost

Active Publication Date: 2015-11-18
GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the limitation of this method is also obvious. The surface-initiated grafted polymer requires special treatment of the substrate membrane to provide usable initiated surface functional groups.
For example, plasma radiation, ultraviolet irradiation, acid-base treatment, etc. Some of these methods are expensive to operate and cannot be mass-produced, and some of them are relatively harsh, which will have adverse effects on the basement membrane itself. High, it needs to be strictly anaerobic, otherwise the polymerization efficiency and polymerization controllability will be greatly reduced

Method used

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  • A polysulfone porous membrane responsive to temperature and acidity and its preparation method and application
  • A polysulfone porous membrane responsive to temperature and acidity and its preparation method and application
  • A polysulfone porous membrane responsive to temperature and acidity and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Blending of polysulfone industrial products and polysulfone azide: Add 1 part of polysulfone S3010, 14 parts of polysulfone azide, and 1 part of polyethylene glycol (Mw=2000Da) to 40 parts of methylpyrrolidone , stirred at 25°C until transparent and clear to obtain the casting solution of polysulfone industrial products and polysulfone azide blend membrane;

[0054] (2) Preparation of porous membrane from polysulfone / polysulfone azide blend: Pour the casting liquid of the polysulfone industrial product and polysulfone azide blend membrane prepared in step (1) onto the substrate of the film applicator , adjust the height of the scraper to 150um, squeegee to form a film, and immerse the substrate in water at 25°C; after the film is separated from the substrate, take out the film and dry it to prepare a polysulfone / polysulfone azide porous membrane. 5 ~ 10um, porosity 63%;

[0055] (3) Modification of the surface of polysulfone / polysulfone azide porous membrane:

[0...

Embodiment 2

[0060] (1) Blending polysulfone industrial products with polysulfone azide: Add 3 parts of polysulfone S3010, 12 parts of polysulfone azide, and 1 part of polyethylene glycol (Mw=2000Da) to 40 parts of dimethyl ethylene glycol In amide, stir until transparent and clear at 25°C to obtain a casting solution for a blend film of polysulfone industrial products and polysulfone azide;

[0061] (2) Preparation of porous membrane from polysulfone / polysulfone azide blend: Pour the casting liquid of the polysulfone industrial product and polysulfone azide blend membrane prepared in step (1) onto the substrate of the film applicator , adjust the height of the scraper to 150um, squeegee to form a film, and immerse the substrate in ethanol at 25°C; after the film is separated from the substrate, take out the film and dry it to prepare a polysulfone / polysulfone azide porous membrane. 5 ~ 10um, porosity 63%;

[0062] (3) Modification of the surface of polysulfone / polysulfone azide porous me...

Embodiment 3

[0067] (1) Blending polysulfone industrial products with polysulfone azide: Add 5 parts of polysulfone S3010, 10 parts of polysulfone azide, and 1 part of polyethylene glycol (Mw=2000Da) to 40 parts of dimethylformaldehyde In amide, stir until transparent and clear at 25°C to obtain a casting solution for a blend film of polysulfone industrial products and polysulfone azide;

[0068] (2) Preparation of porous membrane from polysulfone / polysulfone azide blend: Pour the casting liquid of the polysulfone industrial product and polysulfone azide blend membrane prepared in step (1) onto the substrate of the film applicator , adjust the height of the scraper to 150um, scrape to form a film, and immerse the substrate in methanol at 25°C; after the film is separated from the substrate, take the film out and dry it to prepare a polysulfone / polysulfone azide porous membrane. 5 ~ 10um, porosity 63%;

[0069] (3) Modification of the surface of polysulfone / polysulfone azide porous membran...

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Abstract

The invention belongs to the field of film preparation and modification technologies, and in particular provides a polysulfone porous film in response to temperature and acidity, a preparation method and an application of the polysulfone porous film. With the principle of click chemistry, environmental response polymer of an alkynyl terminal is chemically grafted to the surface of a polysulfone film by reaction between aklyne and nitrine to obtain the polysulfone film of which the surface is grafted with the environmental response polymer chain, and therefore the purpose of modifying the environment response of the polysulfone is realized. The pores of the polysulfone porous film in response to temperature and acidity prepared by the method can change with the changes of pH and temperature, and have reversibility; and furthermore, the physical and chemical properties of the film substrate are not changed basically.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation and modification, in particular to a polysulfone porous membrane responsive to temperature and acidity, its preparation method and application. Background technique [0002] Polysulfone is a slightly amber amorphous transparent or translucent polymer with excellent mechanical properties, high rigidity, wear resistance, high strength, high thermal stability, hydrolysis resistance, good dimensional stability, small molding shrinkage, and non-toxic , radiation resistance, flame resistance, extinguishing property, good chemical stability, except for concentrated nitric acid, concentrated sulfuric acid and halogenated hydrocarbons, it can withstand general acids, alkalis and salts, and can swell in ketones and esters. Porous membranes prepared based on polysulfone have the same advantages as polysulfone substrates, and are widely used in electronics, food and daily necessities, automobiles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D71/80B01D67/00C08J9/42C08F120/06C08F220/54C08F220/06
Inventor 胡继文苗磊杨洋刘锋刘国军邹海良
Owner GUANGZHOU CHEM CO LTD CHINESE ACADEMY OF SCI
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