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Electro-conductive micro-filtration membrane and preparation method thereof

A technology of microfiltration membrane and conductivity, which is applied in the field of conductive microfiltration membrane and its preparation, can solve the problems that the research of conductive microfiltration membrane has not been reported, and achieve the effect of simple and convenient operation, easy amplification, and improved separation efficiency

Inactive Publication Date: 2014-03-05
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Combining the separation process of the microfiltration membrane with the electrochemical process in the application can undoubtedly improve the separation efficiency, but there is no report on the preparation of the conductive microfiltration membrane by combining the characteristics of the microfiltration membrane and the electrode.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Conductive Microfiltration Membrane Blended with Conductive Polymers

[0038] Step 1 Prepare a film-making solution with 8% polyethersulfone, 36% dimethylformamide, 48% polyethylene glycol 200 (mass percentage), and 8% conductive polymer polyaniline.

[0039] Step 2 Scrape the coating liquid on the non-porous support layer (glass plate or plastic plate), with a thickness of 300-500 microns;

[0040] Step 3 Form the film by dry-wet method, that is, moisture absorption and precipitation in air at 40°C and relative humidity of 80% for 5 minutes.

[0041] Step 4 After the phase separation is basically completed, immerse in water to exchange solvents and remove unnecessary components, solidify the membrane structure, and prepare a conductive microfiltration membrane.

[0042] The water flux of the membrane is 34.06ml / cm 2 ·min, thickness 200 microns, average pore diameter 0.44 microns.

Embodiment 3

[0051] Conductive Microfiltration Membrane Composite with Carbon Paper

[0052] Step 1 Prepare a membrane-forming solution with 10% polyethersulfone, 30% N-methylpyrrolidone, and 60% polyethylene glycol 200 (mass percentage).

[0053]Step 2 Scrape the coating liquid on the non-porous support layer (glass plate or plastic plate), with a thickness of 300-500 microns;

[0054] Step 3 Cover the carbon paper on the thin layer of film solution coated by scraping and compound it with it.

[0055] Step 4 Form a film by dry-wet method, absorb moisture and precipitate in air with a relative humidity of 90% at 45°C for 2 minutes.

[0056] Step 5 After the phase separation is basically completed, immerse in water to exchange solvents and remove unnecessary components, solidify the membrane structure, and prepare a conductive microfiltration membrane.

[0057] The water flux of the membrane is 81.12ml / cm 2 ·min, thickness 260 microns, average pore diameter 0.92 microns.

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PUM

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Abstract

The invention relates to an electro-conductive micro-filtration membrane and a preparation method thereof. The electro-conductive micro-filtration membrane is prepared by blending substrate polymer with electro-conductive macromolecules, carbon powder or carbon paper, doping the casting solution with powder or compounding the casting solution and the carbon paper. The membrane formed substrate material is combined with the electro-conductive macromolecules or the carbon material to prepare the electro-conductive micro-filtration membrane, so that the characteristics of the micro-filtration membrane and the characteristics of an electrode are integrated, and the separation process is combined with the electrochemical process to improve the separation efficiency.

Description

technical field [0001] The invention relates to a conductive microfiltration membrane and a preparation method thereof, which can combine the characteristics of the microfiltration membrane and electrodes, and can combine the separation process with the electrochemical process in practical applications to improve separation efficiency. Background technique [0002] The microfiltration membrane separation technology began in the middle of the 19th century. It is a membrane process that uses the static pressure difference as the driving force and uses the "sieving" effect of the mesh-shaped filter medium membrane to separate the membrane process. Removal (retention) of colloids, bacteria and solid matter to achieve the purpose of purification, separation and concentration. Its main technical advantages are: uniform membrane pore size, high filtration precision, fast filtration speed, less adsorption, no medium shedding, etc. It is mainly used in food, beverage, medical and hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12
Inventor 陈兆安吕艳霞吴佩春陆洪斌周建男
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI