Preparation of carbon nanotube/polyaniline/polysulfone conductive ultrafiltration membrane and membrane pollution online monitoring technology

A technology of carbon nanotubes and polyaniline, which is applied in the field of preparation of modified ultrafiltration membranes and membrane fouling monitoring, can solve problems such as pollution, permeability and service life reduction, limit membrane development and application, etc., and achieve sensitive and efficient methods. low cost effect

Inactive Publication Date: 2019-12-10
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, membrane fouling has always been an inevitable problem in the membrane separation process, which will lead to a decrease in the permeability and service life of the membrane, thus limiting the development and application of the membrane.

Method used

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  • Preparation of carbon nanotube/polyaniline/polysulfone conductive ultrafiltration membrane and membrane pollution online monitoring technology
  • Preparation of carbon nanotube/polyaniline/polysulfone conductive ultrafiltration membrane and membrane pollution online monitoring technology
  • Preparation of carbon nanotube/polyaniline/polysulfone conductive ultrafiltration membrane and membrane pollution online monitoring technology

Examples

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Effect test

example 1

[0028] Example 1: A preparation method of pure polysulfone ultrafiltration membrane and online monitoring of membrane fouling, the specific steps are as follows:

[0029] (1) Preparation of a pure polysulfone ultrafiltration membrane. Weigh 6.8g of polysulfone and 0.4g of polyvinylpyrrolidone into 36.5ml of N,N-dimethylformamide, heat and stir at 60°C for 7h to prepare the casting solution, and place the casting solution in an ultrasonic and vacuum oven The defoaming treatment was carried out in the medium, and the membrane was scraped with a 200 μm thick film scraping rod and placed in a water coagulation bath for phase inversion to obtain a flat polysulfone ultrafiltration membrane.

[0030] (2) Membrane fouling online monitoring technology. A prepared pure polysulfone ultrafiltration membrane was placed in a membrane cell with a titanium electrode and connected to an electrochemical workstation to filter a 1 g / L bovine serum albumin solution at 0.1 MPa. The change of memb...

example 2

[0031] Example 2: A preparation method of carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane and online monitoring of membrane fouling, the specific steps are as follows:

[0032] (1) Polyaniline nanofibers were prepared by redox reaction by rapid mixing method. Weigh 3ml of aniline monomer and dissolve it in 100ml of 1mol / L HCl solution, which is called solution A; weigh 2g of ammonium persulfate and dissolve it in 100ml of 1mol / L HCl solution, and call it solution B. The two solutions A and B were quickly mixed, stirred vigorously for 2 minutes, and left to react for 6 hours. The polymerization solution was suction-filtered with a 0.22 μm microfiltration membrane, washed several times with methanol, acetone and deionized water, and dried in a vacuum oven at 60°C for later use.

[0033] (2) Preparation of a carbon nanotube / polyaniline / polysulfone ultrafiltration membrane. Weigh 0.085g of carbon nanotubes, 0.5g of polyaniline and 0.5g of polyvinylpyr...

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Abstract

The invention discloses preparation of a carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane and a membrane pollution online monitoring technology. With polysulfone as a film-forming material, and carbon nanotubes and polyaniline nanofibers as fillers, the carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane is prepared by a blending method and immersion phase transformation. A polysulfone membrane itself is non-conductive, so with the addition of conductive material carbon nanotubes and polyaniline, not only are the flux, hydrophilicity, mechanical strength and other properties of the membrane improved, but also the electrical conductivity of the membrane is improved. The change of the membrane flux is reflected through the change of the membrane resistance, and a membrane pollution condition can be monitored in real time. The preparation method and process flow of the conductive ultrafiltration membrane are simple and easy to operate andlow in cost; the prepared membrane has excellent performance, the real-time monitoring method of the membrane pollution is sensitive and simple, the service life of the membrane is prolonged, and themembrane can be used in the industrial fields such as sewage treatment, protein separation and the like.

Description

technical field [0001] The invention belongs to the technical field of preparation of modified ultrafiltration membrane and membrane pollution monitoring, and relates to the preparation and membrane of a carbon nanotube / polyaniline / polysulfone conductive ultrafiltration membrane with high permeability, high rejection rate, hydrophilicity and conductivity Pollution online monitoring technology. Background technique [0002] As people have higher and higher requirements for drinking water demand and quality, water treatment membranes have attracted the attention of researchers in the field of separation. However, membrane fouling has always been an inevitable problem in the membrane separation process, which will lead to a decrease in the permeability and service life of the membrane, thus limiting the development and application of the membrane. In order to overcome this shortcoming, we need to modify the membrane to improve the anti-fouling performance of the membrane, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D71/58B01D71/02B01D69/12B01D69/06B01D67/00B01D65/10B01D61/14
CPCB01D61/145B01D65/10B01D67/0011B01D67/0013B01D67/0079B01D69/06B01D69/12B01D71/021B01D71/58B01D71/68
Inventor 耿宏章袁雪爽郭志迎耿文铭景立超谷泽增
Owner TIANJIN POLYTECHNIC UNIV
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