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Preparation method for novel anti-pollution polysulfone flat plate ultrafiltration membrane

An ultrafiltration membrane, anti-pollution technology, used in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc. Pore ​​and elution, good results

Inactive Publication Date: 2015-06-03
VONTRON MEMBRANE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a preparation method of a new type of anti-pollution polysulfone flat ultrafiltration membrane, to solve the problem of hydrophilic modification of the sewage treatment surface in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] (1) Add polysulfone, polyvinylpyrrolidone and polyethylene glycol into N,N-dimethylformamide, heat at 60°C, stir for 10 hours, and use a grid mesh after dissolution Microporous filtration, then stand for defoaming under vacuum constant temperature condition, the time of vacuum defoaming is 12h, obtain flat ultrafiltration membrane casting liquid;

[0045] The mass percentage of polysulfone is 16%, the mass percentage of polyethylene glycol is 1%, the mass percentage of polyvinyl chloride pyrrolidone is 1%, and the rest are solvents;

[0046] (2) The casting solution obtained in step (1) is made of non-woven fabric as a support layer, formed by scraping the film by a flat film scraping machine, and solidified into a film by a dry-wet phase transition method to make a flat ultrafiltration membrane with uniform quality ;

[0047] The specific method of coagulating and forming a film by the dry-wet phase transition method is as follows: after the film casting solution with...

Embodiment 2

[0051] (1) Add polysulfone, polyvinylpyrrolidone and polyethylene glycol into N-methylpyrrolidone, heat at 65°C, stir for 12 hours, and filter with a grid mesh after dissolution. Then stand for defoaming under vacuum constant temperature condition, the time of vacuum defoaming is 14h, obtain flat ultrafiltration membrane casting solution;

[0052] The mass percentage of the polysulfone is 17%, the mass percentage of polyethylene glycol is 2%, the mass percentage of polyvinyl chloride pyrrolidone is 2%, and the rest are solvents;

[0053] (2) The casting solution obtained in step (1) is made of non-woven fabric as a support layer, formed by scraping the film by a flat film scraping machine, and solidified into a film by a dry-wet phase transition method to make a flat ultrafiltration membrane with uniform quality ;

[0054] The specific method of coagulating and forming a film by the dry-wet phase transition method is as follows: After the casting film solution with a temperat...

Embodiment 3

[0058] (1) Add polysulfone, polyvinylpyrrolidone and polyethylene glycol into N,N-dimethylacetamide, heat at 70°C, stir for 14 hours, and use a grid mesh after dissolution Microporous filtration, and then stand for defoaming under vacuum constant temperature conditions, the time of vacuum defoaming is 16h, to obtain flat ultrafiltration membrane casting solution;

[0059] The mass percentage of the polysulfone is 18%, the mass percentage of polyethylene glycol is 3%, the mass percentage of polyvinyl chloride pyrrolidone is 3%, and the rest are solvents;

[0060] (2) The casting solution obtained in step (1) is made of non-woven fabric as a support layer, formed by scraping the film by a flat film scraping machine, and solidified into a film by a dry-wet phase transition method to make a flat ultrafiltration membrane with uniform quality ;

[0061] The specific method of coagulating and forming a film by the dry-wet phase transition method is as follows: After the film casting...

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Abstract

The invention discloses a preparation method for a novel anti-pollution polysulfone flat plate ultrafiltration membrane. The preparation method comprises the following steps: adding polysulfone and a pore-forming agent into a solvent; heating, stirring and carrying out micro-pore filtering; then carrying out vacuum de-foaming to obtain a flat plate ultrafiltration membrane casting solution; by taking a non-woven fabric as a supporting layer, and carrying out dry-wet phase changing method scraping by a membrane scraping machine to obtain a uniform flat plate membrane; carrying out grafting, coating and cross-linking on the obtained flat plate membrane by ultraviolet and infrared catalysis manners to realize surface hydrophilic modification, so as to form a stable, durable and good-tolerance hydrophilic protection layer on the surface of the flat plate membrane; and washing and drying to obtain the anti-pollution ultrafiltration membrane. The whole technology has a simple process, raw materials are easily available and industrial automatic production can be realized.

Description

technical field [0001] The invention relates to the field of membrane technology, in particular to a preparation method of a novel anti-pollution polysulfone flat ultrafiltration membrane. Background technique [0002] Ultrafiltration membrane is a microporous filtration membrane with a nominal pore size range of 0.001-0.02 microns, which is widely used in water purification, food or beverage production and other fields. Appropriate pressure is applied to one side of the ultrafiltration membrane to screen out solute molecules smaller than the pore size to separate particles with a molecular weight greater than 500 Daltons and a particle size greater than 2-20 nanometers. According to the appearance characteristics of the membrane, the ultrafiltration membrane can be divided into flat ultrafiltration membrane, tubular ultrafiltration membrane, capillary ultrafiltration membrane, hollow fiber ultrafiltration membrane, porous ultrafiltration membrane and so on. Among them, the...

Claims

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Application Information

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IPC IPC(8): B01D71/78B01D69/06B01D67/00
Inventor 梁松苗马鑫吴宗策
Owner VONTRON MEMBRANE TECH CO LTD
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