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Polyamide-based water-treatment separation membrane having excellent salt removal rate and permeation flux characteristics, and method for manufacturing same

A technology for water treatment and separation membranes, applied in chemical instruments and methods, semi-permeable membrane separation, membranes, etc., to solve problems such as membrane permeation flux decline

Active Publication Date: 2015-07-15
LG CHEM LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, as disclosed in Unexamined Japanese Patent Publication No. H10-337454, in the case of immersing a membrane including an active layer in an acidic solution, negative charges may exist on the surface of the membrane, making positive charges Pollutants can be adsorbed on the membrane, resulting in a decrease in membrane permeate flux

Method used

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  • Polyamide-based water-treatment separation membrane having excellent salt removal rate and permeation flux characteristics, and method for manufacturing same
  • Polyamide-based water-treatment separation membrane having excellent salt removal rate and permeation flux characteristics, and method for manufacturing same

Examples

Experimental program
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Effect test

Embodiment 1

[0061] 18% by weight polysulfone solid was added into a DMF (N,N-dimethylformamide) solution and dissolved therein at a temperature of 80° C. to 85° C. for more than 12 hours to obtain a uniform liquid phase. The solution with a homogeneous liquid phase was cast on a nonwoven fabric formed of polyester material with a thickness of 95 to 100 μm, to a thickness of 45 to 50 μm. Then, the cast nonwoven fabric was placed in water to form a porous polysulfone support.

[0062] After the porous polysulfone support prepared by the above method was immersed in an aqueous solution containing 2% by weight of m-phenylenediamine, 1% by weight of triethylamine, and 2.3% by weight of camphorsulfonic acid for 2 minutes and taken out, a pressure of 25 psi was used to The lower roller removes excess aqueous solution on the support, and then the porous polysulfone support is dried at room temperature for 1 minute.

[0063] After that, an organic solution containing n-hexane (manufactured by Sig...

Embodiment 2

[0066] A water treatment separation membrane was prepared using the same method as in Example 1, except that Isopar G was used as the second organic solvent.

Embodiment 3

[0068] A water treatment separation membrane was prepared using the same method as in Example 1, except that Isopar E was used as the second organic solvent.

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Abstract

The present disclosure provides a method of manufacturing a water-treatment separation membrane having improved salt rejection rate and permeable flux properties, the method including: forming an aqueous solution layer containing an amine compound on a porous support; forming a polyamide active layer by bringing an organic solution containing an acyl halide compound and a first organic solvent into contact with the aqueous solution layer; and coating a second organic solvent having a degree of volatility lower than that of the first organic solvent on the polyamide active layer, and a water-treatment separation membrane manufactured by the manufacturing method.

Description

technical field [0001] The present disclosure relates to a polyamide water treatment separation membrane and a preparation method thereof, and more particularly, to a membrane having improved salt rejection and permeation through inducing a secondary polymerization reaction between acid halide compounds and residual unreacted parts of amine compounds. Quantitative polyamide water treatment separation membrane. Background technique [0002] Recently, due to the severe water pollution and water shortage worldwide, the research and development of new water resources and water supply sources has become an urgent issue in front of people. The purpose of studying water pollution is to deal with domestic water, commercial and industrial water, various household sewage and industrial wastewater, etc. Water treatment processes using separation membranes with energy-saving advantages are of significant significance. In addition, the recent increase in the enforcement of environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/56
CPCB01D67/0088B01D71/56B01D2323/40B01D69/125B01D69/02B01D69/10B01D2323/38B01D2325/04B01D2325/20
Inventor 高永勋金宰弘宋根元申程圭
Owner LG CHEM LTD
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