Polyamide water-treatment separation membrane with improved antifouling properties and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-9649597-B2
Application number	US-201414197204-A
Country	US
Kind code	B2
Filing date	Mar 4, 2014
Priority date	Nov 5, 2012
Publication date	May 16, 2017
Grant date	May 16, 2017

Abstract

A water-treatment separation membrane with good antifouling properties includes a support having pores, a polyamide layer formed on the support, and a passivation layer comprising specific materials formed on the polyamide layer.

First claim

What is claimed is:

1. A water-treatment separation membrane comprising:
a support having pores;
a polyamide layer formed on the support; and
a passivation layer formed on the polyamide layer, the passivation layer including a compound represented by following formula (I),
L 1 -A-L 2 -B-L 3 ,  [Formula I]

in which L 1 is an amine, a haloalkyl, a haloalkenyl, a haloalkynyl, a hydroxyl, a ketone, an aldehyde, an acyl halide, a carbonate, an ester, an ether, an imine, an azide, a nitrile, a thiocyanate, a thione, a thial, a phosphate, an epoxide, an acryloyl amine or a thiol,
A includes one or more C1-6 alkylene unit, one or more C1-6 alkylene oxide unit or a combination thereof,
L 2 is at least one selected from the group consisting of following formulae (II) to (V),

B is an unsubstituted C 1-20 alkylene, aryl alkylene, alkylene oxide, alkenylene, aryl alkenylene or alkenylene oxide or a substituted C 1-20 alkylene, aryl alkylene, alkylene oxide, alkenylene, aryl alkenylene or alkenylene oxide in which the alkylene, the aryl alkylene, the alkylene oxide, the alkenylene, the aryl alkenylene or the alkenylene oxide is substituted with at least one selected from a group consisting of a halogen, a sulfonyl, an amine, a hydroxyl and a ketone, and
L 3 is —CF 3 or —F.

2. The water-treatment separation membrane of claim 1 , wherein A is at least one selected from a group consisting of the following formulae (VI) to (XII):

3. The water-treatment separation membrane of claim 1 , wherein B is at least one selected from a group consisting of following compounds, in which n is 1 to 10 and m is 0 to 10:

4. The water-treatment separation membrane of claim 1 , wherein the compound represented by formula (I) is selected from a group consisting of following compounds:

in which each of x, y and z is an integer from 0 to 70, x+y+z is an integer from 1 to 70, and q is an integer from 1 to 150.

5. The water-treatment separation membrane of claim 1 , wherein the compound represented by formula (I) is grafted to the polyamide layer.

6. A method of forming a water-treatment separation membrane, the method comprising:
providing a support having pores and a polyamide layer formed thereon; and
forming a passivation layer including a compound represented by following formula (I) on the polyamide layer,
L 1 -A-L 2 -B-L 3 ,  [Formula I]

in which L 1 is an amine, a haloalkyl, a haloalkenyl, a haloalkynyl, a hydroxyl, a ketone, an aldehyde, an acyl halide, a carbonate, an ester, an ether, an imine, an azide, a nitrile, a thiocyanate, a thione, a thial, a phosphate, an epoxide, an acryloyl amine or a thiol,
A includes one or more C 1-6 alkylene unit, one or more C 1-6 alkylene oxide unit or a combination thereof,
L 2 is at least one selected from the group consisting of following formulae (II) to (V),

B is an unsubstituted C 1-20 alkylene, aryl alkylene, alkylene oxide, alkenylene, aryl alkenylene or alkenylene oxide or a substituted C 1-20 alkylene, aryl alkylene, alkylene oxide, alkenylene, aryl alkenylene or alkenylene oxide in which the alkylene, the aryl alkylene, the alkylene oxide, the alkenylene, the aryl alkenylene or the alkenylene oxide is substituted with at least one selected from a group consisting of a halogen, a sulfonyl, an amine, a hydroxyl and a ketone, and
L 3 is —CF 3 or —F.

7. The method of claim 6 , wherein forming the passivation layer comprises impregnating the support including the polyamide layer formed thereon with an aqueous solution including the compound represented by formula (I).

8. The method of claim 6 , wherein forming the water treatment separation membrane comprises exposing the support to an aqueous solution including the compound represented by formula (I), and the aqueous solution includes 0.01 to 10 wt % of the compound represented by formula (I).

9. The method of claim 6 , wherein A is at least one selected from a group consisting of the following formulae (VI) to (XII):

10. The method of claim 6 , wherein B is at least one selected from a group consisting of following compounds, in which n is an integer from 1 to 10 and m is an integer from 0 to 10:

11. The method of claim 6 , wherein the compound represented by formula (I) is selected from a group consisting of following compounds:

in which each of x, y and z is an integer from 0 to 70, x+y+z is an integer from 1 to 70, and q is an integer from 1 to 150.

12. The method of claim 6 , wherein the compound represented by formula (I) is grafted to the polyamide layer.

13. A water-treatment module comprising the water-treatment separation membrane according to claim 1 .

14. A water-treatment apparatus comprising the water-treatment module of claim 13 .

Assignees

• Lg Chemical Ltd

Inventors

• Lee Phill
• Kim Jae-Hong
• Shin Chong-Kyu
• Yoo Joung-Eun
• Jeong Seung-Pyo
• Lee Young-Ju
• Ko Young-Hoon
• Kwon Hye-Jin

Classifications

• B01D71/56 Primary

  Polyamides, e.g. polyester-amides · CPC title

• B01D61/025 Primary

  Reverse osmosis; Hyperfiltration · CPC title

• C02F1/44

  by dialysis, osmosis or reverse osmosis {(general membrane separation processes B01D61/00, membrane modules B01D63/00, electrodialysis C02F1/4693, combination of membrane modules and bioreactors C02F3/1268)} · CPC title

• B01D2325/28

  Degradation or stability over time · CPC title

• B01D67/0088

  Physical treatment with compounds, e.g. swelling, coating or impregnation · CPC title