Asymmetric PES filter membrane for removing viruses, and preparation method thereof

An asymmetric and membrane-filtering technology, applied in the field of membrane materials, can solve the problems of restricting the development of virus-removing membranes, cumbersome configuration of casting membrane liquid, complex composite process, etc., and achieves a technology suitable for large-scale promotion, high throughput, and simple preparation process Effect

Inactive Publication Date: 2021-12-28
HANGZHOU COBETTER FILTRATION EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] But this composite ultrafiltration membrane just can be made with at least two kinds of different casting liquids, and its composite process is to use a slot die coating machine to cast two kinds of solutions altogether (device schematic diagram: attached Figure 18 ), the casting thickness of the first polymer solution is adjusted to a suitable thickness, the casting thickness of the second polymer solution is adjusted to a final layer thickness of 15 microns or about 10% of the overall film thickness, and the forming conditions are s

Method used

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  • Asymmetric PES filter membrane for removing viruses, and preparation method thereof
  • Asymmetric PES filter membrane for removing viruses, and preparation method thereof
  • Asymmetric PES filter membrane for removing viruses, and preparation method thereof

Examples

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Effect test

Embodiment 1

[0080] A method for preparing an asymmetric PES membrane with a virus other, comprising the steps of:

[0081] S1: Preparation of a casting solution, a liquid film is formed and cast onto a support; wherein said casting solution comprising by weight parts consisting of the following: 20 parts of polyether sulfone; organic solvent 75 parts; 20 parts of a polar additive; the said casting solution viscosity of 7500 cps; organic solvent is dimethylformamide; polar additive is glycerol, a mixture of polyvinyl alcohol and the amide N-2- propan-hydroxybutyl azobis methyl, mass ratio of 2 : 1: 1;

[0082] S2: The film was immersed together with the support for 40 seconds and solidifying liquid, a liquid phase diffusion within the cured film inner and invasive, and further cured to form a separation layer and a prefiltration layer; curable liquid comprises water and the osmotic additives isopropyl alcohol, the additive content of the permeate is 50%; wherein the curing solution temperature...

Embodiment 2

[0084] A method for preparing an asymmetric PES membrane with a virus other, comprising the steps of:

[0085] S1: Preparation of a casting solution, a liquid film is formed and cast onto a support; wherein a casting solution comprising by weight parts consisting of the following: 21 parts of polyether sulfone; organic solvent 70 parts; 18 parts of a polar additive; casting solution the viscosity of 8000cps; organic solvent is N- ethylpyrrolidone; polar additive is glycerol, a mixture of polyvinyl alcohol and the amide N-2- propan-hydroxybutyl azobis methyl, mass ratio of 2: 1: 1 ;

[0086] S2: The film was immersed together with the support for 45 seconds and solidifying liquid, a liquid phase diffusion within the cured film inner and invasive, and further cured to form a separation layer and a prefiltration layer; solidifying liquid comprising water and ethanol penetration additives, permeation additives content 55%; the curing solution temperature at 30 ℃, the support temperatu...

Embodiment 3

[0088] A method for preparing an asymmetric PES membrane with a virus other, comprising the steps of:

[0089] S1: Preparation of a casting solution, a liquid film is formed and cast onto a support; wherein said casting solution comprising by weight parts consisting of the following: 23 parts of polyether sulfone; organic solvent 65 parts; 16 parts of a polar additive; cast solution viscosity of the film was 9000 cps; organic solvent is N- methylpyrrolidone; polar additive is glycerol, a mixture of polyvinyl alcohol and the amide N-2- propan-hydroxybutyl azobis methyl, mass ratio of 2: 1 :1;

[0090] S2: The film was immersed together with the support for 50 seconds was cured, a cured film was invade the interior and gradually spread, and further cured to form a separation layer and a prefiltration layer; solidifying liquid comprising water and ethylene glycol penetration additives, osmotic additive content of 60%; liquid temperature curing is 30 ℃, the support temperature is 10 ℃...

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Abstract

The invention provides an asymmetric PES filter membrane for removing viruses, and a preparation method thereof. The PES filter membrane comprises a main body, wherein a non-directional zigzag passage is arranged in the main body, the surface of one side of the main body is a first outer surface, the average pore size of the first outer surface is 150-450 nm, the first outer surface is a macroporous membrane, the surface of the other side of the main body is a second outer surface, the average pore diameter of the second outer surface is 10-42 nm, the second outer surface is a small-pore surface, the average pore diameter of the main body continuously changes in a gradient manner from a region close to one side of the first outer surface to a region close to one side of the second outer surface, the main body comprises a pre-filtering layer and a separation layer for intercepting viruses, and the other side of the pre-filtering layer and the other side of the separation layer are in transition through continuous fibers. According to the invention, the PES filter membrane is prepared only through a membrane casting solution, is integrally formed and does not need to be compounded, and the preparation process is relatively simple; and the prepared PES filter membrane has a relatively strong interception effect on parvoviruses with the particle size of 20 nm or more, and a relatively high protein yield can be obtained, so that the requirements of practical application are met.

Description

Technical field [0001] The present invention relates to the field of membrane material, and more particularly to a PES filter having an asymmetrical dissemination of a virus and a preparation method thereof. Background technique [0002] Membrane technology is a new technique for contemporary high-efficiency separation, compared to traditional distillation, rectification, etc., it has high separation efficiency, low energy consumption, small footprint, etc. The core is the core of membrane separation. The polymer filter is a type of isolated film based on the organic polymer polymer, according to a certain process; with the development of the petroleum industry and technology, the application field of polymer filter is continuously expanded, and the fields currently have been applied. There is gas separation, seawater, ultrapure water preparation, deterioration treatment, artificial organs, pharmaceutical, food, agriculture, chemical and other aspects. [0003] According to the v...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D69/02B01D67/00
CPCB01D71/68B01D69/02B01D67/0011B01D67/0013B01D67/0016Y02A20/131
Inventor 贾建东卢红星
Owner HANGZHOU COBETTER FILTRATION EQUIP
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