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Carbon nano tube/polyaniline/polysulfone composite ultra-filtration membrane and preparing method thereof

A technology of carbon nanotubes and polyaniline, which is applied in the field of preparation of modified ultrafiltration membranes, can solve the problems of poor pollution resistance, poor charge responsiveness, and poor hydrophilicity of polysulfone membranes, and achieve simple equipment, convenient operation, and optimized The effect of separation performance

Inactive Publication Date: 2012-07-11
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] One of the objectives of the present invention is to provide a carbon nanotube / polyaniline / polysulfone composite ultrafiltration membrane in order to solve the technical problems of the above-mentioned polysulfone membrane such as poor hydrophilicity, poor charge responsiveness, and poor pollution resistance. The composite ultrafiltration membrane has more amino and imine active groups, and has good hydrophilicity, anti-pollution, electrical conductivity and mechanical strength, and can be widely used in affinity ultrafiltration separation of various substances.

Method used

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  • Carbon nano tube/polyaniline/polysulfone composite ultra-filtration membrane and preparing method thereof
  • Carbon nano tube/polyaniline/polysulfone composite ultra-filtration membrane and preparing method thereof
  • Carbon nano tube/polyaniline/polysulfone composite ultra-filtration membrane and preparing method thereof

Examples

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Effect test

Embodiment 1

[0082] A preparation method of a pure polysulfone ultrafiltration membrane (that is, the carbon nanotube-reinforced polyaniline nanofiber content is 0%), specifically comprising the following steps:

[0083] (1) Preparation of casting solution

[0084] Weigh 1.5g polysulfone and add to 8.5g N - In methylpyrrolidone, stir magnetically for two days at 50° C. to form a light yellow homogeneous polysulfone solution with a concentration of 15%, which is the casting solution, and set aside;

[0085] (2) Coating film

[0086] 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...

Embodiment 2

[0092] A method for preparing a carbon nanotube / polyaniline / polysulfone composite ultrafiltration membrane, wherein the carbon nanotube-reinforced polyaniline nanofiber and polysulfone are calculated by mass percentage, that is, the carbon nanotube-reinforced polyaniline nanofiber: polysulfone 10%: 90%, that is, the carbon nanotube-reinforced polyaniline nanofiber content used is 10%, and its specific preparation steps are as follows:

[0093] (1) Preparation of casting solution

[0094] Weigh 1.35g polysulfone and add 7.15g N -Methylpyrrolidone, at 50 o Dissolving under C obtains polysulfone solution;

[0095] Weigh 0.15g carbon nanotube reinforced polyaniline nanofiber and add 1.35g N -Methylpyrrolidone at 50 o Ultrasonic dispersion at C for 6 hours to obtain a carbon nanotube-reinforced polyaniline nanofiber dispersion;

[0096] Then the above polysulfone solution and carbon nanotube reinforced polyaniline nanofiber dispersion were mixed at 50 o C under magn...

Embodiment 3

[0104] A method for preparing a carbon nanotube / polyaniline / polysulfone composite ultrafiltration membrane, wherein the carbon nanotube-reinforced polyaniline nanofiber and polysulfone are calculated by mass percentage, that is, the carbon nanotube-reinforced polyaniline nanofiber: polysulfone 15%: 85%, that is, the carbon nanotube-reinforced polyaniline nanofiber content used is 15%, and its specific preparation steps are as follows:

[0105] (1) Preparation of casting solution

[0106] Weigh 1.275g polysulfone and add 6.475g N -Methylpyrrolidone, at 50 o Dissolving under C obtains polysulfone solution;

[0107] Weigh 0.225g carbon nanotube reinforced polyaniline nanofiber and add 2.025g N -Methylpyrrolidone at 50 o Ultrasonic dispersion at C for 6 hours to obtain a carbon nanotube-reinforced polyaniline nanofiber dispersion;

[0108] Then the above polysulfone solution and carbon nanotube-reinforced polyaniline nanofiber dispersion were mixed uniformly at 50°C...

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Abstract

The invention discloses a carbon nano tube / polyaniline / polysulfone composite ultra-filtration membrane and a preparing method of the membrane, i.e. the carbon nano tube / polyaniline / polysulfone composite ultra-filtration membrane is prepared by using polysulfone as a matrix membrane formation material and a carbon nano tube reinforced polyaniline nano-fiber as a filler through solvent commixing phase transfer. The preparing method of the carbon nano tube / polyaniline / polysulfone composite ultra-filtration membrane provided by the invention is simple in structure, strong in operability and low in cost; the electric conductivity of the carbon nano tube / polyaniline / polysulfone composite ultra-filtration membrane can be 0.1S / cm, the retention rate of bovine serum albumin is 39.8-73.7%, the contact angle of the water is reduced to be minimum 32.6 degrees, while the pure water flux is 7.3 times of a pure polysulfone membrane, and the membrane can be used in application fields, such as protein isolation, medicine terminal filtration, industrial waste water treatment and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified ultrafiltration membranes, and in particular relates to a carbon nanotube / polyaniline / polysulfone composite ultrafiltration membrane with hydrophilicity, conductivity, high permeability and high rejection rate and a preparation method thereof. Background technique [0002] In recent years, organic 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. Solvent / non-solvent phase transfer is the most commonly used method for preparing organic ultrafiltration membranes. That is, through the steps of casting membrane solution preparation, scraping membrane, solvent / non-solvent exchange, etc., an asymmetric ultrafiltration membrane with a loose finger-hole support layer and a dense skin layer is obtained. In actual use, in order to w...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D71/60B01D71/68B01D69/12B01D67/00B01D61/14C02F1/44C07K1/34
Inventor 廖耀祖王霞钱微余灯广李颖李晓燕
Owner UNIV OF SHANGHAI FOR SCI & TECH
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