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Chlorine-resistant highly permeable water-treatment membrane, and method for preparing same

A water treatment membrane and aqueous solution technology, applied in chemical instruments and methods, reverse osmosis, semi-permeable membrane separation, etc., can solve the problems of reducing the permeation flux of the polyamide layer, increasing the number of processes, etc., achieving excellent chlorine resistance, permeation The effect of excellent flux performance

Active Publication Date: 2014-09-03
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such methods, since a separate process for forming the coating is required, the number of processes increases, and at the same time, the permeation flux of the polyamide layer may decrease due to the formation of the coating.

Method used

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  • Chlorine-resistant highly permeable water-treatment membrane, and method for preparing same
  • Chlorine-resistant highly permeable water-treatment membrane, and method for preparing same
  • Chlorine-resistant highly permeable water-treatment membrane, and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 18% by weight of polysulfone solid was added to N,N-dimethylformamide (DMF) solution, and dissolved therein at a temperature of 80 to 85° C. for more than 12 hours to obtain a uniform liquid phase. The solution having this uniform liquid phase was casted on a nonwoven fabric formed of a polyester material and having a thickness of 95 to 100 μm, thereby forming a porous polysulfone support.

[0060] After impregnating the polysulfone support in an aqueous solution containing 2% by weight of m-phenylenediamine (mPD) and a fluorinated monoglycidyl ether represented by the following chemical formula 3 (the molar ratio of m-phenylenediamine to fluorinated monoglycidyl ether is After 2 minutes in 1000:1), the excess aqueous solution on the support was removed using a roller with 25 psi pressure, and the porous polysulfone support was dried at room temperature for 1 minute.

[0061] [chemical formula 3]

[0062]

[0063] Then, the support body was immersed in a solution of...

Embodiment 2

[0065] A water treatment membrane was prepared using the same method as in Example 1, except that an aqueous solution containing m-phenylenediamine (mPD) and fluorinated monoglycidyl ether in a molar ratio of 500:1 was used.

Embodiment 3

[0067] A water treatment membrane was prepared using the same method as in Example 1, except that an aqueous solution containing m-phenylenediamine (mPD) and fluorinated monoglycidyl ether in a molar ratio of 100:1 was used.

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Abstract

The present disclosure relates to a method of manufacturing a water treatment membrane having high chlorine resistance and high permeability, the method including: forming an aqueous amine solution layer on a porous support, using an aqueous amine solution including a fluorine compound having an epoxy group in a terminal thereof and an amine compound; and forming a polyamide layer containing the fluorine compound by bringing an organic solution containing acyl halide into contact with the aqueous amine solution layer, and a water treatment membrane manufactured using the same.

Description

technical field [0001] The present disclosure relates to a water treatment membrane having high chlorine resistance and high permeability and a method for producing the same, and more particularly, to water treatment having excellent chlorine resistance and permeability by including a fluorine compound in a polyamide layer Membranes and methods for their preparation. Background technique [0002] Osmosis refers to the phenomenon that a solvent moves from a solution with a low solute concentration to another solution with a high solute concentration through a semipermeable separation membrane that separates the two solutions. In this case, the pressure acting on the solution of high solute concentration by the movement of the solvent is called osmotic pressure. However, when an external pressure higher than the osmotic pressure level is applied, the solvent moves towards a solution of low solute concentration, a phenomenon known as reverse osmosis. According to the principl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D61/02B01D71/82B01D71/56B01D67/00
CPCB01D71/56B01D71/82B01D71/32B01D69/125B01D69/02B01D69/1213B01D69/10B01D67/0006B01D61/025C02F1/441B01D2325/20B01D2325/30B01D2323/12B01D69/1251B01D61/02B01D67/00B01D69/12
Inventor 金宰弘高永勳申程圭
Owner LG CHEM LTD
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