Method for manufacturing water treatment separator, water treatment separator manufactured using same, and water treatment module comprising water treatment separator

Patent metadata

Field	Value
Publication number	US-10688449-B2
Application number	US-201715770859-A
Country	US
Kind code	B2
Filing date	May 18, 2017
Priority date	May 18, 2016
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

The present specification provides a method for manufacturing a water-treatment separation membrane, the method comprising: preparing a porous support; forming a polyamide active layer on the porous support by using an interfacial polymerization of an aqueous solution comprising an amine compound and an organic solution comprising an acyl halide compound; and coating a coating solution comprising a random copolymer comprising the monomers represented by Chemical Formulae 1 to 3 onto the polyamide active layer, in which a content of the random copolymer is 0.5 wt % to 2 wt % based on a total weight of the coating solution, a water-treatment separation membrane manufactured by using the same, and a water treatment module comprising the water-treatment separation membrane.

First claim

The invention claimed is:

1. A method for manufacturing a water-treatment separation membrane, the method comprising:
preparing a porous support;
forming a polyamide active layer on the porous support by using an interfacial polymerization of an aqueous solution comprising an amine compound and an organic solution comprising an acyl halide compound; and
coating a coating solution comprising a random copolymer comprising monomers represented by the following Chemical Formulae 1 to 3 onto the polyamide active layer,
wherein a content of the random copolymer is 0.5 wt % to 2 wt % based on a total weight of the coating solution:

in Chemical Formulae 1 to 3,
a content of the monomer of Chemical Formula 1 is 70 wt % to 90 wt % based on the entire random copolymer,
a content of the monomer of Chemical Formula 2 is 5 wt % to 25 wt % based on the entire random copolymer,
a content of the monomer of Chemical Formula 3 is 5 wt % to 25 wt % based on the entire random copolymer, and
R 1 to R 3 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group.

2. The method of claim 1 , wherein a solvent of the coating solution is a hydrophilic solvent.

3. The method of claim 1 , wherein R 1 to R 3 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms.

4. The method of claim 1 , wherein R 1 and R 2 are hydrogen.

5. A water-treatment separation membrane manufactured by the manufacturing method of claim 1 , the water-treatment separation membrane comprising:
a porous support;
a polyamide active layer disposed on the porous support; and
a coating layer comprising a random copolymer comprising a monomer of the following Chemical Formula 1, a monomer of the following Chemical Formula 2, and a monomer of the following Chemical Formula 3 on the polyamide active layer:

in Chemical Formulae 1 to 3,
a content of the monomer of Chemical Formula 1 is 70 wt % to 90 wt % based on the entire random copolymer,
a content of the monomer of Chemical Formula 2 is 5 wt % to 25 wt % based on the entire random copolymer,
a content of the monomer of Chemical Formula 3 is 5 wt % to 25 wt % based on the entire random copolymer, and
R 1 to R 3 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group.

6. The water-treatment separation membrane of claim 5 , wherein R 1 to R 3 are the same as or different from each other, and are each independently hydrogen; or a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms.

7. The water-treatment separation membrane of claim 5 , wherein R 1 and R 2 are hydrogen.

8. A water treatment module comprising the water-treatment separation membranes of claim 5 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Byoungsoo
• Kim Taehyeong
• Jeon Hyungjoon
• Lee Youngju
• Shin Chong Kyu
• Kwak Bong Ju

Classifications

• B01D69/1071

  Woven, non-woven or net mesh · CPC title

• B01D69/1251

  by interfacial polymerisation · CPC title

• B01D71/381

  Polyvinylalcohol · CPC title

• C02F1/441

  by reverse osmosis · CPC title

• B01D2325/30

  Chemical resistance · CPC title