Preparation method of high-flux polypyrrole doped polymer conductive ultrafiltration membrane

A high polymer and polypyrrole technology, applied in the field of membrane separation, can solve the problems of particle size inhomogeneity, agglomeration, etc., and achieve the effect of wide application prospects

Pending Publication Date: 2018-11-06
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it should be pointed out that these inorganic nanoparticles have problems such as agglomeration and uneven particle size during the blending proc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) First, dissolve polyvinylpyrrolidone and sodium dodecylsulfonate in N-methylpyrrolidone at a dissolution temperature of 25°C, stir and dissolve for 2 hours; then, add polyvinyl chloride precursor (14%) Into the aforementioned solution, the temperature is 60°C, and the stirring time is 12h, until the solution is uniform and stable; cooling to 20°C, adding pyrrole monomer to the solution, with a mass fraction of 2%, and stirring for 12h, until the color of the solution is uniform; then 2mol / The ferric chloride N-methylpyrrolidone solution of L is added dropwise in the aforementioned solution, and the molar concentration ratio of ferric chloride and pyrrole monomer is 1:1, and after stirring for 12h, the gained solution is a scraping solution; The membrane solution was left to stand for 1 hour to exhaust the air bubbles in the solution;

[0018] (2) Utilizing the film-casting solution gained in step (1) at a temperature of 20° C. and a relative humidity of 30% using a...

Embodiment 2

[0022] (1) First, dissolve polyethylene glycol and sodium dodecylsulfonate in N-methylpyrrolidone at a temperature of 30°C and stir to dissolve for 1 hour; then, add polyacrylonitrile precursor (16%) to Into the aforementioned solution, the temperature is 60°C, and the stirring time is 12h, until the solution is uniform and stable; cooling to 20°C, adding pyrrole monomer to the solution, with a mass fraction of 4%, and stirring for 12h, until the color of the solution is uniform; then 2mol / The ferric chloride N-methylpyrrolidone solution of L is added dropwise in the aforementioned solution, and the molar concentration ratio of ferric chloride and pyrrole monomer is 2:1, and after stirring for 12h, the gained solution is a film scraping solution; The membrane solution was left to stand for 1 hour to exhaust the air bubbles in the solution;

[0023] (2) Utilizing the film-casting solution gained in step (1) at a temperature of 25° C. and a relative humidity of 30% using a flat...

Embodiment 3

[0027] (1) First, dissolve polyvinylpyrrolidone and sodium octadecylsulfonate in N, N-dimethylformamide at a temperature of 30° C., stir and dissolve for 2 hours; then, dissolve the polyvinyl chloride precursor ( 18%) was added to the aforementioned solution at a temperature of 60°C and stirred for 12 hours until the solution was uniform and stable; cooled to 20°C, adding pyrrole monomer to the solution with a mass fraction of 5%, and stirred for 12 hours until the solution was uniform in color; Then 2mol / L ferric chloride N-methylpyrrolidone solution is added dropwise to the aforementioned solution, the molar concentration ratio of ferric chloride to pyrrole monomer is 2:1, after stirring for 12 hours, the resulting solution is a scraping film solution; the membrane solution was allowed to stand for 1h to exhaust the air bubbles in the solution;

[0028] (2) Utilizing the film-casting solution obtained in step (1) at a temperature of 30° C. and a relative humidity of 50% usin...

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Abstract

The invention discloses a preparation method of a high-flux polypyrrole doped polymer conductive ultrafiltration membrane. The method comprises the following steps: (1) a polymer stabilizer and a surfactant are dissolved in an organic solvent; (2) a polymer precursor and a pyrrole monomer are added to the solution obtained in step (1) and stirred; (3) a certain quantity of oxidizing agent is addedto the solution obtained in step (2), and a membrane casting solution is prepared; (4) a flat membrane with thickness being 100-300 mu m is prepared from the membrane casting solution obtained in step (3) by scraping; (5) the flat membrane obtained in step (4) is immersed into deionized water, and the conductive ultrafiltration membrane is obtained by phase inversion. Conductivity of the preparedhigh-flux conductive ultrafiltration membrane is 0.1-5 S/m, pure water flux under pressure of 0.2 MPa is 2740-3660 L/(m2.h), sodium alginate interception rate is 94%, and flux recovery rate after interception is 74%. The membrane can serve as a cathode, and after being powered on, the conductive ultrafiltration membrane has certain anti-pollution capacity.

Description

technical field [0001] The invention belongs to the technical field of membrane separation, in particular to a method for preparing a high-throughput polypyrrole-doped polymer conductive ultrafiltration membrane. Background technique [0002] Ultrafiltration technology is widely used in industrial production and residential life, and is used in the separation, concentration, purification of biological products, and food and pharmaceutical industries. However, the currently used ultrafiltration membranes generally have the problems of low flux and weak anti-pollution ability. In the actual application process, with the operation of the membrane module, the surface of the membrane will be polluted, resulting in a decrease in water flux and a decrease in membrane performance, which seriously shortens the service life of the ultrafiltration membrane. [0003] In order to further improve the membrane flux of the ultrafiltration membrane and alleviate the membrane pollution probl...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D69/06B01D71/30B01D71/34B01D71/42
CPCB01D67/0002B01D67/0011B01D67/0013B01D69/02B01D69/06B01D71/30B01D71/34B01D71/42B01D2325/26
Inventor 郝润龙赵毅毛星舟柳苏童鑫高海萍
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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