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Polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof

A polyacrylonitrile-based membrane, polyacrylonitrile technology, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problems of membrane fouling, poor hydrophilicity of PAN membrane, etc., and achieve simple preparation process and anti-pollution performance. Enhanced, mildly conditioned effects

Inactive Publication Date: 2010-06-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, PAN membranes still have problems such as poor hydrophilicity and serious membrane fouling during the separation of protein solutions.

Method used

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  • Polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof
  • Polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof
  • Polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 3.2 g of polyacrylonitrile PAN (the molecular weight of polyacrylonitrile is between 80,000 and 200,000, obtained by emulsion polymerization of acrylonitrile monomer). And 16.8g of solvent N, N dimethylformamide DMF was added into a three-necked flask, placed in a water bath at 60°C at a speed of 900r / min and stirred for 5 hours to form a transparent and clear homogeneous casting solution; after stirring evenly, the casting solution Stand at 60°C for 6 hours to remove the air bubbles in the casting solution; take a clean ordinary glass plate and a self-made scraper, place it flat on the table, scrub it with absolute ethanol, take out the casting solution from the constant temperature water bath, and Pour an appropriate amount of casting solution on one end of the glass plate, pull the scraper to the other end of the glass plate at a uniform speed, and scrape out a nascent film about 240 μm thick on the glass plate; place it in the air for 10 to 30 seconds, and then...

Embodiment 2

[0021] Weigh 3.2g of polyacrylonitrile PAN and 16.8g of solvent N, N dimethylformamide DMF into a three-necked flask, place in a water bath at 60°C at 900r / min and stir to dissolve for 5 hours to form a transparent and clear homogeneous casting solution ;Stir the casting solution at 60°C for 6 hours after stirring evenly to remove the air bubbles in the casting solution; take a clean ordinary glass plate and a self-made scraper, put it flat on the table, scrub it with absolute ethanol, and remove it from a constant temperature Take out the casting solution from the water bath, pour an appropriate amount of casting solution on one end of the glass plate, pull the scraper to the other end of the glass plate at a uniform speed, and scrape out a nascent film about 240 μm thick on the glass plate; place it in the air for 10-30 seconds After that, put it into a water bath to solidify to form a film, and soak it in deionized water for 24 to 36 hours to obtain the polyacrylonitrile ult...

Embodiment 3

[0023] Weigh 3.2g of polyacrylonitrile PAN and 16.8g of solvent N, N dimethylformamide DMF into a three-necked flask, place in a water bath at 60°C at 900r / min and stir to dissolve for 5 hours to form a transparent and clear homogeneous casting solution ;Stir the casting solution at 60°C for 6 hours after stirring evenly to remove the air bubbles in the casting solution; take a clean ordinary glass plate and a self-made scraper, put it flat on the table, scrub it with absolute ethanol, and remove it from a constant temperature Take out the casting solution from the water bath, pour an appropriate amount of casting solution on one end of the glass plate, pull the scraper to the other end of the glass plate at a uniform speed, and scrape out a nascent film about 240 μm thick on the glass plate; place it in the air for 10-30 seconds After that, put it into a water bath to solidify to form a film, and soak it in deionized water for 24 to 36 hours to obtain the polyacrylonitrile ult...

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Abstract

The invention relates to polyacrylonitrile hydrolyzed modified ultrafiltration membrane resisting protein pollution and preparation method thereof. The polyacrylonitrile hydrolyzed modified ultrafiltration membrane is prepared by hydrolyzing and modifying a polyacrylonitrile based membrane made of by taking polyacrylonitrile and N,N-dimethylformamide as raw materials, wherein the mass ratio of the polyacrylonitrile to the N,N-dimethylformamide is 16:84. The preparation method comprises the steps of: dissolving the polyacrylonitrile in the N,N-dimethylformamide at a temperature of 60 DEG C to prepare a casting membrane solution, defoaming, pouring the casing membrane solution on glass, knifing, placing, putting into a water bath to be solidified into a membrane, soaking with water to obtain a polyacrylonitrile ultrafiltration based membrane, soaking into aqueous alkali with 60 DEG C for 1h, washing to be neutral, soaking a polyacrylonitrile hydrolyzed membrane into an aminoethanol water solution with 60 DEG C again, and taking out the membrane and washing to obtain the polyacrylonitrile hydrolyzed modified ultrafiltration membrane. The invention has simple modification process and more generated active group quantity; and the ultrafiltration membrane prepared by the method has great pollution-resisting capacity for protein molecules.

Description

technical field [0001] The invention relates to a polyacrylonitrile anti-protein pollution hydrolysis modified ultrafiltration membrane and a preparation method thereof, belonging to the ultrafiltration membrane preparation technology. Background technique [0002] Ultrafiltration is a liquid phase separation process based on a sieving mechanism under the driving force of a static pressure difference using a membrane as a separation medium. The molecular weight cut-off range of the ultrafiltration membrane is roughly 1000-300000. Bacteria, viruses, latex, etc. As a new and efficient separation technology, ultrafiltration has some obvious advantages: no phase change, can be separated at room temperature and low pressure, and can well maintain the physiological activity of proteins; low energy consumption, small equipment volume, simple structure; The process has strong adaptability and is easy to be automatically controlled. At present, ultrafiltration technology has been w...

Claims

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Application Information

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IPC IPC(8): B01D71/42B01D71/82B01D65/08B01D61/14
Inventor 苏延磊姜忠义孙萌萍
Owner TIANJIN UNIV
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