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Polysulfone ultrafiltration membrane and preparation method thereof

A polysulfone ultrafiltration membrane and a polysulfone technology are applied in the field of polysulfone ultrafiltration membrane and its preparation, which can solve the problems of damage to the material of the ultrafiltration membrane body and unfavorable long-term use of the ultrafiltration membrane.

Inactive Publication Date: 2021-02-19
苏州富淼膜科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The method of radiation grafting will cause certain damage to the material of the ultrafiltration membrane, which is not conducive to the long-term use of the ultrafiltration membrane.

Method used

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  • Polysulfone ultrafiltration membrane and preparation method thereof
  • Polysulfone ultrafiltration membrane and preparation method thereof
  • Polysulfone ultrafiltration membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022](1) Preparation of polysulfone casting film: accurately weigh 4% PEG6000 and 2% ZnCl according to the mass fraction percentage2, 1% PVPK60, and 71% DMAC solvent were stirred at 80°C until completely dissolved; then 22% of polysulfone raw material was added and mechanically stirred at 80°C for 4h until completely dissolved; static and vacuum to remove bubbles, That is, a uniform, transparent polysulfone casting liquid with a certain viscosity is obtained;

[0023](2) Film casting process: Rinse the glass plate and scraper that comes with the automatic coating machine at room temperature, and stick the dry non-woven fabric on the glass plate smoothly; adjust the thickness of the automatic coating machine differentiator It is 160um, and the coating speed is set to 15m / min; the polysulfone casting liquid is uniformly coated on the non-woven fabric substrate, and a polysulfone nascent membrane with a certain thickness is formed;

[0024](3) Membrane production by phase inversion method: ...

Embodiment 2

[0026](1) Preparation of polysulfone casting film: accurately weigh 4% PEG4000 and 1.5% ZnCl according to the mass fraction percentage2, 1% PVPK60, and 71% DMAC solvent were stirred at 80°C until completely dissolved; then 22% of polysulfone raw material was added and mechanically stirred at 80°C for 4h until completely dissolved; static and vacuum to remove bubbles, That is, a uniform, transparent polysulfone casting liquid with a certain viscosity is obtained;

[0027](2) Film casting process: Rinse the glass plate and scraper that comes with the automatic coating machine at room temperature, and stick the dry non-woven fabric on the glass plate smoothly; adjust the thickness of the automatic coating machine differentiator 150um, set the coating speed to 15m / min; uniformly coat the polysulfone casting liquid on the non-woven fabric substrate, and form a polysulfone nascent membrane with a certain thickness;

[0028](3) Membrane production by phase inversion method: Put the polysulfone n...

Embodiment 3

[0030](1) Preparation of polysulfone casting film: accurately weigh 5% PEG6000 and 2% ZnCl according to the mass fraction percentage2, 2% PVPK60, and 71% DMAC solvent were stirred at 80°C until completely dissolved; then 20% of the polysulfone raw material was added and mechanically stirred at 80°C for 6 hours until completely dissolved; static and vacuum to remove bubbles, That is, a uniform, transparent polysulfone casting liquid with a certain viscosity is obtained;

[0031](2) Film casting process: Rinse the glass plate and scraper that comes with the automatic coating machine at room temperature, and stick the dry non-woven fabric on the glass plate smoothly; adjust the thickness of the automatic coating machine differentiator It is 145um, and the coating speed is set to 15m / min; the polysulfone casting liquid is uniformly coated on the non-woven fabric substrate to form a polysulfone nascent membrane with a certain thickness;

[0032](3) Membrane production by phase inversion method...

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Abstract

The invention discloses a preparation method of a polysulfone ultrafiltration membrane, which comprises the following steps: adding an organic additive and ZnCl2 into an organic solvent, conducting complete dissolving, adding polysulfone, conducting heating, conducting stirring until the polysulfone is completely dissolved, conducting standing, and carrying out vacuum defoaming and degassing to obtain a uniform and transparent polysulfone membrane casting solution with viscosity; uniformly smearing the polysulfone membrane casting solution on a non-woven fabric base material through an automatic coating machine to obtain a polysulfone primary membrane; and soaking the polysulfone primary membrane in a coagulating bath at room temperature for a period of time, and conducting solidifying toobtain the polysulfone ultrafiltration membrane. According to the polysulfone ultrafiltration membrane and the preparation method thereof, the preparation method is started from a membrane structure,when a membrane casting solution is prepared, the hydrophilicity of the membrane and the morphology of membrane section holes can be regulated and controlled by adding an organic additive; and the prepared polysulfone ultrafiltration membrane has the advantages of high flux and strong hydrophilicity.

Description

Technical field[0001]The invention relates to a polysulfone ultrafiltration membrane and a preparation method thereof.Background technique[0002]With the continuous development of membrane separation technology, polysulfone ultrafiltration membrane, as a polymer membrane material with good chemical stability, high mechanical strength, and good acid and alkali resistance, is widely used in drinking water purification, sewage treatment and Biotechnology and other fields.[0003]Due to the hydrophobicity of the polysulfone ultrafiltration membrane, the water flux of the membrane is low, the hydrophilic performance is poor, and the membrane is easily fouled and difficult to clean, which affects its application in water treatment. Currently, there are two main methods for modifying polysulfone membranes: blending modification and radiation grafting modification. The radiation grafting method will cause certain damage to the ultrafiltration membrane body material, which is not conducive to t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/68B01D61/14B01D67/00C02F1/44B01D61/00B01D61/02
CPCB01D71/68B01D61/145B01D67/0079C02F1/444B01D61/027B01D61/025B01D2325/36
Inventor 侯婷马超麻丽峰魏星光郭守君
Owner 苏州富淼膜科技有限公司