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High-hydrophilic compound reverse osmosis membrane and preparation method of high-hydrophilic compound reverse osmosis membrane

A technology of reverse osmosis membrane and hydrophilicity, which is applied in the field of highly hydrophilic composite reverse osmosis membrane and its preparation, can solve the problems of poor hydrophilicity, etc., and achieve the goals of improved hydrophilicity, wide application value, and improved preparation process Effect

Inactive Publication Date: 2016-06-22
唐山海清源科技股份有限公司
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  • Summary
  • 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 the existing composite reverse osmosis membrane, carry out hydrophilic modification to the polymer porous support layer in the reverse osmosis membrane, and provide a kind of highly hydrophilic composite reverse osmosis membrane and its preparation method , can solve this problem well

Method used

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  • High-hydrophilic compound reverse osmosis membrane and preparation method of high-hydrophilic compound reverse osmosis membrane

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Embodiment 1

[0033] Disperse graphene oxide 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, and slowly add polysulfone Form the feed liquid in the dispersion solution, then raise the temperature of the feed liquid to 80°C, continue stirring and dissolving for 6 hours, then let it stand for degassing for 16 hours to form a uniform and stable casting solution, and the contents of the components in the casting solution are as follows: : Graphene oxide 1%, N,N-dimethylformamide 73%, ethylene glycol methyl ether 8%, polysulfone 18%.

[0034] The casting solution forms a liquid primary film on the non-woven fabric through a scraper, and undergoes a phase inversion to form a solid film through a pure water gel bath at 18°C. The solid film is then washed through cleaning tanks with water temperatures of 25°C and 60°C in sequence...

Embodiment 2

[0037] Disperse graphene oxide 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, and slowly add polysulfone Form the feed liquid in the dispersion solution, then raise the temperature of the feed liquid to 80°C, continue stirring and dissolving for 6 hours, then let it stand for degassing for 16 hours to form a uniform and stable casting solution, and the contents of the components in the casting solution are as follows: : 2% graphene oxide, 72% N,N-dimethylformamide, 8% ethylene glycol methyl ether, 18% polysulfone.

[0038] The casting solution forms a liquid primary film on the non-woven fabric through a scraper, and undergoes a phase inversion to form a solid film through a pure water gel bath at 18°C. The solid film is then washed through cleaning tanks with water temperatures of 25°C and 60°C in sequence...

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Abstract

The invention discloses a high-hydrophilic compound reverse osmosis membrane and a preparation method of the high-hydrophilic compound reverse osmosis membrane. Graphene oxide containing abundant oxygen-containing functional groups including carboxyl, hydroxyl, carbonyl and the like is used as a modifying agent, is added into a polysulfone porous supporting layer and is used for changing an inner pore structure of the polysulfone porous supporting layer, so that the hydrophilic performance of the prepared polysulfone porous supporting layer modified by graphene oxide is remarkably improved, and furthermore, the hydrophilic performance of the compound reverse osmosis membrane is improved, and the high-hydrophilic compound reverse osmosis membrane is prepared. The preparation method of the high-hydrophilic compound reverse osmosis membrane mainly comprises the following two steps: (1) preparing the polysulfone porous supporting layer modified by graphene oxide; (2) preparing a polyamide desalting layer. With the adoption of the high-hydrophilic compound reverse osmosis membrane and the preparation method of the high-hydrophilic compound reverse osmosis membrane, the problem that the hydrophilic performance of an existing polyamide reverse osmosis membrane is poor is solved and the industrial application prospect is good.

Description

technical field [0001] The invention belongs to the technical field of membrane separation for water treatment, and in particular relates to a highly hydrophilic composite reverse osmosis membrane and a preparation method thereof. Background technique [0002] Due to the advantages of low energy consumption, high efficiency, and easy operation, reverse osmosis membrane filtration technology is widely used in the desalination of seawater and brackish water, pure water preparation, wastewater treatment, separation and concentration in the food industry, etc. hotspots. However, due to the poor hydrophilicity of the membrane, the adsorption and deposition of pollutants on the membrane surface and in the membrane pores will cause the membrane pore size to become smaller and clogged, and the membrane fouling caused by factors such as concentration polarization and the formation of a gel layer will cause membrane pollution. The attenuation of flux and the reduction of separation e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/82B01D67/00B01D69/02B01D69/10B01D69/12B01D71/02B01D71/56B01D71/68
CPCB01D71/82B01D67/0079B01D69/02B01D69/10B01D69/12B01D71/021B01D71/56B01D71/68B01D2323/02B01D2323/36B01D2325/36
Inventor 汤培戴鸿君
Owner 唐山海清源科技股份有限公司
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