Preparation method of high-flux antifouling composite filter membrane

A high-flux, composite membrane technology, applied in chemical instruments and methods, membranes, membrane technology, etc., to achieve environmental friendliness, good anti-fouling effect, good high permeability effect

Inactive Publication Date: 2018-09-28
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: The present invention provides a method for preparing a high-flux anti-fouling composite membrane to solve the problem that the method for preparing the composite membrane cannot make the composite membrane have good anti-fouling effect and high permeability at the same time

Method used

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  • Preparation method of high-flux antifouling composite filter membrane
  • Preparation method of high-flux antifouling composite filter membrane
  • Preparation method of high-flux antifouling composite filter membrane

Examples

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Effect test

Embodiment 1

[0025] A kind of preparation method of high flux antifouling chitosan / polyacrylonitrile nanofiber matrix composite filter membrane comprises: 1, polyacrylonitrile 8g is dissolved in N, in N-dimethylformamide (DMF) solvent 92g, obtains Transparent and uniform electrospinning solution; the manufacturer of polyacrylonitrile is Jinshan Petrochemical, and the molar mass fraction is M w =120000g / mol; 2, dissolving chitosan in 1% acetic acid aqueous solution to prepare a coating solution with a mass fraction of 1.2%; 3, adding the electrospinning solution in step 1 to the syringe, The extrusion is controlled by a micro-injection pump, the nozzle of the syringe is connected to the high-voltage positive electrode, the electrospinning parameters are controlled at a voltage of 22kv, the nozzle aperture is 0.7mm, the solution flow rate is 18μl / min, the ambient temperature is 35°C, and the relative air humidity is 35%. Electrospinning is carried out , to obtain nanofibers, the average diam...

Embodiment 2

[0028] A high-throughput antifouling sodium alginate / polyethersulfone nanofiber-based composite membrane preparation method comprises: 1. Dissolving 26 g of polyethersulfone in N, N-dimethylformamide (DMF) solvent 74 g to obtain Transparent and uniform electrospinning solution; polyethersulfone is produced by Solvay (Shanghai) Co., Ltd., and the molar mass fraction is M w =64000g / mol; 2. Sodium alginate was dissolved in deionized water to prepare a coating solution with a mass fraction of 2%; 3. The electrospinning solution in step 1 was added to the syringe, and injected by microinjection The pump controls the extrusion, the nozzle of the syringe is connected to the high-voltage positive electrode, the electrospinning parameters are controlled at a voltage of 24kv, the nozzle aperture is 0.7mm, the solution flow rate is 16μl / min, the ambient temperature is 30°C, and the relative air humidity is 30%. Electrospinning is performed to obtain nano fiber, the average diameter of th...

Embodiment 3

[0031] A kind of preparation method of high-throughput antifouling sodium polyacrylate / polyvinylidene fluoride nanofiber matrix composite filter membrane comprises: 1, polyvinylidene fluoride 16g is dissolved in 84g N, N-dimethylformamide (DMF) / acetone In a mixed solvent with a mass ratio of 7:3, a transparent and uniform electrospinning solution is obtained; the supplier of polyvinylidene fluoride is Aldrich, and the molar mass fraction is M w=370000g / mol; 2. Sodium polyacrylate was dissolved in deionized water to prepare a coating solution with a mass fraction of 2.5%; 3. The electrospinning solution in step 1 was added to the syringe, and the extrusion was controlled by a micro-injection pump out, the nozzle of the syringe is connected to the high-voltage positive electrode, the electrospinning parameters are controlled at a voltage of 18kv, the nozzle aperture is 0.3mm, the solution flow rate is 40μl / min, the ambient temperature is 50°C, and the relative air humidity is 30%...

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Abstract

The invention discloses a preparation method of a high-flux antifouling composite filter membrane. The preparation method comprises the steps: dissolving a polymer material into a solvent to prepare an electrospinning solution; then, carrying out electrospinning to obtain nanofibers; next, carrying out cold pressing to obtain a nanofiber-based membrane; dissolving a polyelectrolyte into a solventto prepare a coating solution; then, coating the nanofiber-based membrane with the coating solution, and carrying out standing and drying in the shade at room temperature to obtain a nanofiber-based composite membrane with the surface being provided with a complete cortical layer; and then, soaking the nanofiber-based composite membrane into a dye with charges being opposite to those on the surface cortical layer to obtain the high-flux antifouling composite filter membrane. According to the preparation method, a "pollution layer" of the dye is used as a constituent part of a functional barrier layer of the composite membrane, so that the prepared composite filter membrane simultaneously has a good antifouling effect and high permeability, and the preparation method is simple and easy, environment-friendly, capable of realizing fine regulation of the pore diameter on the surface of the functional barrier layer of the composite membrane and suitable for large-scale production.

Description

technical field [0001] The invention relates to the preparation of a separation composite membrane, in particular to a preparation method of a high-throughput antifouling composite membrane. Background technique [0002] A large amount of high-concentration dye wastewater discharged by the printing and dyeing industry is one of the main sources of industrial wastewater. Most dyes are extremely stable in nature, complex in structure, difficult to degrade, and have carcinogenic, teratogenic, and mutagenic effects. Efficient treatment of printing and dyeing wastewater can not only protect the lives of humans and other organisms, but also reuse the purified water and recycled dyes to alleviate the serious water shortage crisis in our country and take the road of sustainable development. However, printing and dyeing wastewater has the characteristics of large chroma, high content of organic pollutants, complex components, water quality changes, high biological toxicity, and diff...

Claims

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Application Information

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IPC IPC(8): B01D71/06B01D69/12B01D69/02B01D67/00
CPCB01D67/0002B01D69/02B01D69/12B01D71/06B01D2323/39B01D2325/00
Inventor 神领弟
Owner XUZHOU NORMAL UNIVERSITY
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