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Preparation method of highly hydrophilic polysulfone ultrafiltration membrane

A technology of polysulfone ultrafiltration membrane and hydrophilicity, which is applied in the direction of chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of poor hydrophilicity of ultrafiltration membranes, achieve excellent hydrophilicity, and improve hydrophilicity , the effect of widely applied value

Inactive Publication Date: 2016-06-15
唐山海清源科技股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problem of poor hydrophilic performance of existing ultrafiltration membranes, modify polysulfone ultrafiltration membranes, and provide a preparation method for highly hydrophilic polysulfone ultrafiltration membranes, which can well solve this problem

Method used

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  • Preparation method of highly hydrophilic polysulfone ultrafiltration membrane
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  • Preparation method of highly hydrophilic polysulfone ultrafiltration membrane

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preparation example Construction

[0019] The preparation method of a highly hydrophilic polysulfone ultrafiltration membrane of the present invention, the casting membrane liquid system is as follows: the membrane material is selected from polysulfone, the modified material is selected from graphene oxide, the additive is selected from ethylene glycol methyl ether, and the polar organic solvent is selected from N,N-Dimethylformamide.

[0020] The invention discloses a method for preparing a highly hydrophilic polysulfone ultrafiltration membrane. The ratio of components in the casting solution system is as follows: the content of polysulfone is 10%-25%, and the content of graphene oxide is 0.01%- 5%, the content of ethylene glycol methyl ether is 5%-15%, the content of N,N-dimethylformamide is 55%-84.99%, and the content of the above components are all calculated by weight percentage.

[0021] A kind of preparation method of highly hydrophilic polysulfone ultrafiltration membrane of the present invention, its ...

Embodiment 1

[0026] Graphene oxide (selected from Tangshan Jianhua Science and Technology Development Co., Ltd., graphene oxide JH- , the technical index is: the thickness is 0.5-4nm, the lateral dimension is 0.5-3μm, and the number of layers is 1-10 layers) using ultrasonic dispersion in N, N-dimethylformamide, ultrasonic dispersion for 2 hours, forming a uniform and stable dispersion Solution, add ethylene glycol methyl ether to the dispersion solution, stir and mix evenly, slowly add polysulfone to the dispersion solution to form a feed liquid, then raise the temperature of the feed liquid to 80°C, continue to stir and dissolve for 6 hours, and then let it stand for defoaming 16h, a uniform and stable casting solution was formed, and the contents of the components in the casting solution were as follows: graphene oxide 1%, N, N-dimethylformamide 73%, ethylene glycol methyl ether 8%, poly Sulfone 18%.

[0027] Pour the casting solution into the trough of the scraping film equipment. Th...

Embodiment 2

[0029] Disperse graphene oxide (same as in Example 1) in N,N-dimethylformamide by ultrasonic wave, and disperse by ultrasonic wave for 2 hours to form a uniform and stable dispersion solution, add ethylene glycol methyl ether to the dispersion solution, stir and mix evenly , slowly add polysulfone to the dispersion solution to form a feed liquid, then raise the temperature of the feed liquid to 80°C, continue stirring and dissolving for 6 hours, and then stand for defoaming for 16 hours to form a uniform and stable casting solution, as described in the casting solution The contents of the components are as follows: 2% graphene oxide, 72% N,N-dimethylformamide, 8% ethylene glycol methyl ether, and 18% polysulfone.

[0030] Pour the casting solution into the trough of the scraping film equipment. The casting solution forms a liquid primary film on the polyester non-woven fabric through a scraper. After passing through a pure water gel bath at 18°C, a phase transformation occurs t...

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Abstract

The invention discloses a preparation method of a highly hydrophilic polysulfone ultrafiltration membrane. The method comprises the following steps: uniformly dispersing graphene oxide in a polar organic solvent by ultrasonic waves, then adding polysulfone and additives to the organic solution, dissolving and stirring to form a uniform and stable casting solution, and adopting a phase inversion method to cast The membrane liquid undergoes phase inversion on the polyester non-woven fabric through the scraping membrane equipment to form a solid membrane, and finally a highly hydrophilic polysulfone ultrafiltration membrane is produced. In the present invention, graphene oxide rich in carboxyl, hydroxyl, carbonyl and other oxygen-containing functional groups is added to the polysulfone ultrafiltration membrane as a modifier to change the internal pore structure of the polysulfone ultrafiltration membrane and reduce the The contact angle significantly improves the hydrophilic performance of the prepared modified polysulfone ultrafiltration membrane, overcomes the problems of poor hydrophilic performance of the existing ultrafiltration membrane, and has a good industrial application prospect.

Description

technical field [0001] The invention belongs to the technical field of water treatment membrane separation, and in particular relates to a preparation method of a highly hydrophilic polysulfone ultrafiltration membrane. Background technique [0002] Membrane separation technology has the advantages of low energy consumption, simple operation and high separation efficiency. As a new separation method, it has been widely used in medicine, food, biology, chemical industry, environmental protection and other industries. Membrane separation technology can be divided into microfiltration, ultrafiltration, nanofiltration and reverse osmosis according to pore size. Among them, ultrafiltration technology has the advantages of high concentration and purification efficiency, simple operation and low energy consumption, and is currently a research hotspot in the field of membrane separation at home and abroad. one. Ultrafiltration membrane technology has a wide range of industrial ap...

Claims

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Application Information

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IPC IPC(8): B01D71/68B01D67/00B01D69/02
CPCB01D71/68B01D67/0079B01D67/0088B01D69/02B01D2323/02B01D2323/12B01D2325/36
Inventor 汤培戴鸿君
Owner 唐山海清源科技股份有限公司
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