US 12,274,986 B2
Inorganic porous membrane
John Wang, Singapore (SG); Zhiyang Lyu, Singapore (SG); How Yong Ng, Singapore (SG); Tze Chiang Albert Ng, Singapore (SG); and Jun Ding, Singapore (SG)
Assigned to National University of Singapore, Singapore (SG)
Appl. No. 17/627,499
Filed by National University of Singapore, Singapore (SG)
PCT Filed Jul. 16, 2020, PCT No. PCT/SG2020/050415
§ 371(c)(1), (2) Date Jan. 14, 2022,
PCT Pub. No. WO2021/015671, PCT Pub. Date Jan. 28, 2021.
Claims priority of application No. 10201906862S (SG), filed on Jul. 25, 2019.
Prior Publication US 2022/0258104 A1, Aug. 18, 2022
Int. Cl. B01D 69/02 (2006.01); B01D 61/14 (2006.01); B01D 67/00 (2006.01); B01D 69/12 (2006.01); B01D 71/02 (2006.01); B33Y 80/00 (2015.01); C02F 1/44 (2023.01)
CPC B01D 69/02 (2013.01) [B01D 61/14 (2013.01); B01D 67/00411 (2022.08); B01D 67/0069 (2013.01); B01D 69/1216 (2022.08); B01D 71/025 (2013.01); B33Y 80/00 (2014.12); C02F 1/444 (2013.01); B01D 2325/022 (2013.01); B01D 2325/04 (2013.01); B01D 2325/08 (2013.01); B01D 2325/20 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An inorganic hierarchical porous membrane comprising at least two layers, wherein each layer of the at least two layers comprises a different average pore size as compared to another layer of the at least two layers, and wherein the membrane comprises a patterned surface, wherein the at least two layers comprise:
a buffer layer formed on a porous substrate; and
an active layer formed on the buffer layer,
wherein a surface of only the active layer is patterned to form the patterned surface and wherein average pore size of the active layer is smaller than average pore size of the buffer layer,
wherein the membrane is a ceramic-based membrane.