Composition for interfacial polymerization of polyamide and method for manufacturing reverse osmosis membrane using same

Patent metadata

Field	Value
Publication number	US-10632425-B2
Application number	US-201715749478-A
Country	US
Kind code	B2
Filing date	Mar 31, 2017
Priority date	Mar 31, 2016
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

The present specification provides a composition for interfacial polymerization of polyamide including at least one of an amine compound and an acyl halide compound; a surfactant; and a compound represented by Chemical Formula 1, and a method for preparing a reverse osmosis membrane using the same.

First claim

The invention claimed is:

1. A composition, comprising:
an amine compound;
a surfactant; and
a compound of Chemical Formula 1:

wherein, in Chemical Formula 1:
x and y are the same as or different from each other, and each independently an integer of 1 to 30;
a ratio of x and y is from 1:1 to 1:3; and
L 1 is a linear or branched alkylene group.

2. The composition for interfacial polymerization of polyamide of claim 1 , wherein the surfactant is a compound of Chemical Formula 2:

wherein in Chemical Formula 2:
L 2 is a linear or branched alkylene group;
n is an integer of from 0 to 10; and
M + is any one selected from the group consisting of Li + , Na + and K + .

3. The composition for interfacial polymerization of polyamide of claim 1 , wherein the amine compound comprises an aromatic amine compound, and the aromatic amine compound includes a compound of Chemical Formula 3:

wherein in Chemical Formula 3:
n is an integer from 1 to 3; and
m is an integer from 1 or 2.

4. The composition for interfacial polymerization of polyamide of claim 3 , wherein the aromatic amine compound further includes one or more types of amine selected from the group consisting of m-phenylenediamine, p-phenylenediamine, 1,3,6-benzenetriamine, 4-chloro-1,3-phenylenediamine, 6-chloro-1,3-phenylenediamine and 3-chloro-1,4-phenylenediamine.

5. The composition for interfacial polymerization of polyamide of claim 3 , wherein the compound of Chemical Formula 3 includes one or more compounds selected from the group consisting of 2,3-diaminotoluene, 2,4-diaminotoluene, 2,5-diaminotoluene, 2,6-diaminotoluene, 3,4-diaminotoluene, 2,4,6-trimethyl-m-phenyl ene-diamine, m-toluidine, p-toluidine, o-toluidine, 2,3-dimethylaniline, 2,4-dimethylaniline, 2,5-dimethylaniline and 2,6-dimethylaniline.

6. The composition for interfacial polymerization of polyamide of claim 3 , which is an aqueous solution, including,
the amine compound including the compound of Chemical Formula 3;
the surfactant; and
the compound of Chemical Formula 1, wherein the compound of Chemical Formula 3 is present in an amount from 0.1% by weight to 5% by weight with respect to the aqueous solution.

7. The composition for interfacial polymerization of polyamide of claim 6 , wherein the compound of Chemical Formula 3 is present in an amount from 0.5% by weight to 4% by weight with respect to the aqueous solution.

8. The composition for interfacial polymerization of polyamide of claim 1 , wherein the compound of Chemical Formula 1 is present in an amount greater than 0% by weight and less than or equal to 0.1% by weight with respect to 100% by weight of the whole composition for interfacial polymerization of polyamide.

9. The composition for interfacial polymerization of polyamide of claim 1 , wherein the surfactant is present in an amount greater than 0% by weight and less than or equal to 0.1% by weight with respect to 100% by weight of the whole composition for interfacial polymerization of polyamide.

10. A method for preparing a reverse osmosis membrane, comprising:
forming a polyamide active layer on a support by reacting the composition for interfacial polymerization of polyamide of claim 1 with an acyl halide.

11. The method for preparing a reverse osmosis membrane of claim 10 , wherein the composition for interfacial polymerization of polyamide includes the amine compound, the surfactant and the compound represented by Chemical Formula 1, and the polyamide active layer is formed through interfacial polymerization by bringing the composition for interfacial polymerization of polyamide into contact with the acyl halide compound.

12. A reverse osmosis membrane prepared using the preparation method of claim 10 .

13. The reverse osmosis membrane of claim 12 , further comprising an anti-fouling layer provided on the polyamide active layer.

14. A water-treatment module comprising the reverse osmosis membrane of claim 13 .

Assignees

• Lg Chemical Ltd

Inventors

• Gil Hyungbae
• Jeon Byungho
• Ryu Hyuin
• Kim Yeji
• Shin Chong Kyu

Classifications

• 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

• B01D71/32

  containing fluorine atoms · CPC title

• C02F1/441

  by reverse osmosis · CPC title

• C08L77/00

  Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain (of polyhydrazides C08L79/06; of polyamideimides or polyamide acids C08L79/08); Compositions of derivatives of such polymers · CPC title

• C08G69/18

  Anionic polymerisation · CPC title