US 12,311,321 B2
Anti-fouling and semi-permeable membrane
Nur Amalyna Binte Azman, Singapore (SG); Yang Zhao, Singapore (SG); Ye Wee Siew, Singapore (SG); Dongyu Liu, Brønshøj (DK); Brett Holmberg, Rungsted Kyst (DK); Guofei Sun, Singapore (SG); Weng Hong Ho, Singapore (SG); and Xuan Tung Nguyen, Singapore (SG)
Assigned to Aquaporin A/S, Kongens Lyngby (DK); and Aquaporin Asia Pte Ltd, Singapore (SG)
Appl. No. 17/784,335
Filed by Aquaporin A/S, Kongens Lyngby (DK); and Aquaporin Asia Pte Ltd, Singapore (SG)
PCT Filed Dec. 14, 2020, PCT No. PCT/EP2020/085949
§ 371(c)(1), (2) Date Jun. 10, 2022,
PCT Pub. No. WO2021/116488, PCT Pub. Date Jun. 17, 2021.
Claims priority of application No. 10201912023T (SG), filed on Dec. 12, 2019; and application No. PA202070032 (DK), filed on Jan. 16, 2020.
Prior Publication US 2023/0064768 A1, Mar. 2, 2023
Int. Cl. B01D 69/12 (2006.01); B01D 65/08 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 69/14 (2006.01); B01D 71/38 (2006.01); B01D 71/56 (2006.01); B01D 71/74 (2006.01)
CPC B01D 69/1251 (2022.08) [B01D 65/08 (2013.01); B01D 67/0006 (2013.01); B01D 67/0088 (2013.01); B01D 69/02 (2013.01); B01D 69/1216 (2022.08); B01D 69/141 (2013.01); B01D 69/144 (2013.01); B01D 71/381 (2022.08); B01D 71/383 (2022.08); B01D 71/56 (2013.01); B01D 71/74 (2013.01); B01D 2321/281 (2022.08); B01D 2323/21826 (2022.08); B01D 2323/21827 (2022.08); B01D 2323/21839 (2022.08); B01D 2323/30 (2013.01); B01D 2323/40 (2013.01); B01D 2325/28 (2013.01); Y02A 20/131 (2018.01)] 14 Claims
 
1. An anti-fouling, semi-permeable membrane comprising:
a porous support layer;
a thin film composite (TFC) layer formed on a surface of the support layer; and
a cross-linked polyvinyl alcohol (PVA) layer formed on top of the TFC layer;
wherein the cross-linked PVA layer is the reaction product of PVA and a cross-linking agent, said cross-linking agent being a polybasic acid comprising three or more acid groups or precursors thereof, characterized in that an aqueous glycerol solution is applied to a surface of the support layer not in contact with the TFC layer prior to the application of the cross-linked PVA layer.