IP Library › Granted Patent US 12,691,422
Granted Patent B2
US 12,691,422 · App. 17/618,203 · Granted Jul 28, 2026

Filtration membrane and method of production thereof

Inventors: Xinyue Wen (Sydney, AU); Yi You (Sydney, AU); Xiaoheng Jin (Sydney, AU); Heriberto Bustamante (Parramatta, AU); Rakesh Joshi (Sydney, AU)
Assignees: Newsouth Innovations Pty Limited; Sydney Water Corporation
B01D71/0211B01D61/147B01D61/18B01D63/02B01D69/10B01D69/1213B01D71/20B01D71/34B01D71/36C02F1/444B01D2323/30B01D2325/12B01D2325/24C02F2101/30C02F2303/20
View Patent ↗
Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 12,691,422
App. No.
17/618,203
Granted
Jul 28, 2026
Kind
B2
Abstract

A composite membrane is disclosed that comprises a porous polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE) or nitrocellulose membrane body. The membrane also comprises graphene oxide disposed on a surface of the membrane body. An array comprising two or more such composite membranes is also disclosed. A method of preparing the composite membrane is also disclosed. Further, a method of removing natural organic matter (NOM) from NOM-contaminated water, or water suspected of being contaminated with NOM, is disclosed.

Claims (13)

1 . A method of preparing a composite membrane, the method comprising:

(a) providing a porous polyvinylidene fluoride (PVDF) membrane body;

(a1) contacting the porous PVDF membrane body with 1,5-pentanediol; and

(b) filtering a dispersion comprising graphene oxide through the PVDF membrane body such that a continuous phase of the dispersion passes through a surface of the membrane body, thereby depositing graphene oxide on the surface of the PVDF membrane body.

2 . The method according to claim 1 , wherein the continuous phase of the dispersion comprising graphene oxide comprises at least 50% v/v ethanol.

3 . The method according to claim 1 , further comprising a step of treating the porous PVDF membrane body with a solvent to remove, completely or at least partially, any protective coating that may be present on the PVDF membrane body before step (al).

4 . The method according to claim 3 , comprising immersing the PVDF membrane body in the solvent for at least 2 hours to remove, completely or at least partially, any protective coating.

5 . The method according to claim 3 , comprising immersing the PVDF membrane body in the solvent for at least 12 hours to remove, completely or at least partially, any protective coating.

6 . The method according to claim 1 , wherein step (al) comprises immersing the porous PVDF membrane body in 1,5-pentanediol.

7 . The method according to claim 1 , wherein step (al) comprises rinsing the porous PVDF membrane body with 1,5-pentanediol.

8 . The method according to claim 1 , wherein step (al) comprises contacting the porous PVDF membrane body with 1,5-pentanediol for 24 hours.

9 . The method according to claim 1 , wherein step (al) comprises contacting the porous PVDF membrane body with 1,5-pentanediol for 48 hours.

10 . The method according to claim 1 , further comprising a step of removing 1,5-pentandiol after step (al) and before step (b).

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 10, 2022
From: WEN, XINYUE; YOU, YI; JIN, XIAOHENG; BUSTAMANTE, HERIBERTO; JOSHI, RAKESH
To: NEWSOUTH INNOVATIONS PTY LIMITED; SYDNEY WATER CORPORATION
Reel/Frame 058595/0001 →
Priority Claims (1)
AU 2019902045 · Jun 12, 2019 · national
Continuity (1)
Related Publication 20220274064A1 · Sep 1, 2022
References Cited (20)
US 10442709B2 · Zheng · 2019 [cited by examiner]
US 20020092809A1 · Ries et al. · 2002 [cited by applicant]
US 20160297693A1 · Raveendran-Nair et al. · 2016 [cited by applicant]
CN 105727758A · 2016 [cited by applicant]
CN 108722206A · 2018 [cited by applicant]
CN 108854565A · 2018 [cited by applicant]
CN 109289546A · 2019 [cited by applicant]
JP 2016522737A · 2016 [cited by applicant]
JP 2018532579A · 2018 [cited by applicant]
KR 101986437B1 · 2019 [cited by applicant]
WO 2014168629A1 · 2014 [cited by applicant]
WO 2015003880A1 · 2015 [cited by applicant]
WO 2017044845A1 · 2017 [cited by applicant]
WO 2017201482A1 · 2017 [cited by applicant]
WO 2019028280A1 · 2019 [cited by applicant]
WO 2019106344A1 · 2019 [cited by applicant]
Jia et al., “Covalently crosslinked graphene oxide membranes by esterification reactions for ions separation,” J. Mater. Chem. A, 2015, 3, 4405-4412 (Year: 2015). [cited by examiner]
“International Preliminary Report on Patentability corresponding to International Application No. PCT/AU2020/050593 mailed Oct. 1, 2021”. [cited by applicant]
“International Search Report and Written Opinion corresponding to International Application No. PCT/AU2020/050593 mailed Aug. 20, 2020”. [cited by applicant]
Baskoro, Febri , et al., “Ultrathin Graphene Oxide Composite Membrane for Water Purification”, 12th World Filtration Congress, Taipei (Apr. 2016) 7 pages. [cited by applicant]