Reverse osmosis membrane and method of use

Patent metadata

Field	Value
Publication number	US-11052354-B2
Application number	US-201716472139-A
Country	US
Kind code	B2
Filing date	Dec 14, 2017
Priority date	Dec 20, 2016
Publication date	Jul 6, 2021
Grant date	Jul 6, 2021

Abstract

The invention relates to a membrane, and method of manufacture of a membrane for reverse osmosis having a porous substrate, and a layer adjacent the porous substrate comprising a two dimensional nanosheet material and crosslinked polymer. The two dimensional nanosheet material is preferably chosen from the group comprising graphene oxide including reduced graphene oxide, holey graphene, holey graphene oxide, laminated graphene oxide and holey reduced graphene oxide.

First claim

The invention claimed is:

1. A membrane for reverse osmosis comprising:
(i) a porous substrate, and
(ii) a layer adjacent the porous substrate and comprising a two dimensional nanosheet material and a crosslinked polymer, wherein the crosslinked polymer is formed from N-isopropylacrylamide and N,N′-methylenebisacrylamide.

2. The membrane according to claim 1 wherein the two dimensional nanosheet material is graphene.

3. The membrane according to claim 1 wherein the two dimensional nanosheet material is chosen from the group comprising graphene oxide including reduced graphene oxide, holey graphene, holey graphene oxide, laminated graphene oxide and holey reduced graphene oxide.

4. The membrane according to claim 1 wherein the two dimensional nanosheet material is pristine graphene oxide laminate.

5. The membrane according to claim 1 wherein the two dimensional nanosheet material is chosen from the group comprising MoS2, boron nitride, metal oxides and metal carbides.

6. The membrane according to claim 1 wherein the porous substrate is based on poly(ether sulphone) or poly sulphone.

7. The method of manufacturing the membrane of claim 1 including the steps of:
(i) generating the porous substrate, and subsequently
(ii) applying a solution of two dimensional nanosheet material and two monomers, wherein the two monomers are N-isopropylacrylamide and N,N′-methylenebisacrylamide, to the porous substrate,
(iii) crosslinking the monomers to form a polymer.

8. The method according to claim 7 wherein the solution of two dimensional nanosheet material and the two monomers are applied to the porous substrate by spin coating, filtration or reduced pressure casting of the solution.

9. The method according to claim 7 wherein the two dimensional nanosheet material is graphene.

10. The method according to claim 7 wherein the two dimensional nanosheet material is chosen from the group comprising reduced graphene oxide, holey graphene, holey graphene oxide, laminated graphene oxide and holey reduced graphene oxide.

11. The method according to claim 7 wherein the two dimensional nanosheet material is pristine graphene oxide laminate.

12. The membrane according to claim 7 wherein the two dimensional nanosheet material is chosen from the group comprising MoS2, boron nitride, metal oxides and metal carbides.

13. The membrane according to claim 7 wherein the porous substrate is based on poly(ether sulphone).

14. The membrane according to claim 1 when used for reverse osmosis filtration of saline water.

15. The method of filtration comprising the step of passing a fluid through the membrane of claim 1 .

16. The filtration apparatus including the membrane of claim 1 .

Assignees

• Univ Monash

Inventors

• Wang Huanting
• Kim Seungju

Classifications

• B01D69/1213

  Laminated layers · CPC title

• B01D71/401

  Polymers based on the polymerisation of acrylic acid, e.g. polyacrylate · CPC title

• B01D67/00793

  Dispersing a component, e.g. as particles or powder, in another component · CPC title

• B01D69/125

  In situ manufacturing by polymerisation, polycondensation, cross-linking or chemical reaction · CPC title

• B01D71/0211 Primary

  Graphene or derivates thereof · CPC title