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A kind of polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane and preparation method thereof

A nano-polypyrrole, asymmetric technology, applied in ultrafiltration, chemical instruments and methods, membrane technology, etc., can solve the problems of uneven dispersion of polypyrrole in composite membranes, easy residual oxidants and monomers, etc., and achieve good selective separation. Function, high charge response performance, effect of improving heat resistance

Inactive Publication Date: 2011-11-30
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a polysulfone-polypyrrole nanoparticle asymmetric composite ultrafiltration membrane and its preparation in order to solve the above technical problems such as uneven dispersion of polypyrrole in polysulfone and easy residue of oxidant and monomer method

Method used

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  • A kind of polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane and preparation method thereof
  • A kind of polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane and preparation method thereof
  • A kind of polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] Preparation of pure polysulfone membranes

[0099] (1) Preparation of casting solution

[0100] Weigh 1.5g polysulfone and add to 6.83g N -in methylpyrrolidone, magnetically stirred at 50°C for two days to form a light yellow homogeneous polysulfone solution with a concentration of 18wt%, which is ready for use;

[0101] (2) Coating film

[0102] With the aid of water-resistant adhesive tape, the polyester non-woven fabric was spread very smoothly on the glass plate, and the Doctor Blade adjustable film applicator was used to coat the film, and the thickness of the film was controlled to 152 μm; the polysulfone solution after degassing was placed in a straight line Apply it evenly on the polyester non-woven fabric horizontally, and then use a Doctor Blade type film applicator to apply the film;

[0103] (3) Film formation

[0104] Place the glass plate coated with the casting solution in the above step (2) horizontally and immerse it in th...

Embodiment 2

[0109] A method for preparing a polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane with a polypyrrole nanoparticle content of 2.0%, comprising the steps of:

[0110] (1) Preparation of casting solution

[0111] Weigh 0.03g of hydrochloric acid-doped polypyrrole nanoparticles with a diameter of 80-100nm and add 6.83g N -Methylpyrrolidone, after ultrasonic dispersion at 50°C for 6h, then magnetic stirring at the same temperature for 24h, so that the polypyrrole nanoparticles are uniformly dispersed in the N -in methylpyrrolidone; then 1.47g of polysulfone was added to each of the above dispersions, magnetically stirred at 50°C for 24h, and then ultrasonicated for 2h to form a polysulfone-polypyrrole nanoparticle blend solution with a polypyrrole content of 2.0%. stand-by;

[0112] (2), coating film

[0113] Replace the pure polysulfone solution with the polypyrrole content of 2.0% polysulfone-polypyrrole nanoparticle blend s...

Embodiment 3

[0118] A method for preparing a polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane with a polypyrrole nanoparticle content of 4.0%, comprising the steps of:

[0119] (1) Preparation of casting solution:

[0120] Weigh 0.06g of hydrochloric acid-doped polypyrrole nanoparticles with a diameter of 80-100nm and add 6.83g N -Methylpyrrolidone, after ultrasonic dispersion at 50°C for 6h, then magnetic stirring at the same temperature for 24h, so that the polypyrrole nanoparticles are uniformly dispersed in the N - into methylpyrrolidone; then add 1.44g of polysulfone to each of the above dispersions, stir magnetically at 50°C for 24h, and then sonicate for 2h to form a polysulfone-polypyrrole nanoparticle blend solution with a polypyrrole content of 4.0%. ,stand-by;

[0121] (2), coating film

[0122] The pure polysulfone solution is replaced by the polysulfone-polypyrrole nanoparticle blend solution with a polypyrrole content o...

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Abstract

The invention discloses a preparation method of a polysulfone-polypyrrole nano particle composite asymmetric ultrafiltration membrane. That is, using polysulfone as the matrix membrane material and highly dispersed polypyrrole nanoparticles as the filler, polysulfone-polypyrrole nanoparticles composite asymmetric ultrafiltration membranes with different compositions were prepared by solvent blending and phase transfer. The preparation method of the invention requires simple equipment, convenient operation, low production cost and no post-treatment. The polypyrrole nanoparticles in the obtained composite membrane are uniformly dispersed in the polysulfone, and the obtained membrane has no pollution. During the preparation process, the pore structure, hydrophilicity and chargeability of the membrane are controlled by adjusting the content, particle size and concentration of the casting solution of polypyrrole nanoparticles, so as to optimize the separation performance of the membrane. The resulting composite ultrafiltration membrane is suitable for terminal filtration of various Chinese and Western medicine injections, oral liquids, eye drops, etc., protein separation and purification, and human hemodialysis, etc., especially has a good selective separation function for bovine serum proteins.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified ultrafiltration membranes, in particular to a polysulfone-polypyrrole nanoparticle composite asymmetric ultrafiltration membrane with high hydrophilic performance, high charge response performance, high permeability and high protein retention rate and its preparation method. Background technique [0002] In recent years, asymmetric ultrafiltration membrane technology has shown unique advantages over traditional separation technologies in the field of biological separation due to its simplicity, low energy consumption and high efficiency. (Ghosh R. Protein separation using membrane chromatography: opportunities and challenges [J]. Journal of Chromatography A, 2002, 952(1-2): 13–27. Feins M, Sirkar K K. Highly selective membranes in protein ultrafiltration [J] ]. Biotechnology and Bioengineering, 2004, 86(6): 603–611. Feins M, Sirkar K K. Novel internally staged ultrafiltration fo...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/12B01D61/14
Inventor 廖耀祖谭娜王霞
Owner UNIV OF SHANGHAI FOR SCI & TECH
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