US 12,420,238 B2
Asymmetric multiblock copolymer-homopolymer films, methods of making same, and uses thereof
Ulrich B. Wiesner, Ithaca, NY (US); and Yusuke Hibi, Shizuoka (JP)
Assigned to Cornell University, Ithaca, NY (US)
Appl. No. 18/262,633
Filed by Cornell University, Ithaca, NY (US)
PCT Filed Jan. 22, 2022, PCT No. PCT/US2022/013430
§ 371(c)(1), (2) Date Jul. 24, 2023,
PCT Pub. No. WO2022/159780, PCT Pub. Date Jul. 28, 2022.
Claims priority of provisional application 63/140,718, filed on Jan. 22, 2021.
Prior Publication US 2024/0100485 A1, Mar. 28, 2024
Int. Cl. B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/28 (2006.01); B01D 71/44 (2006.01); B01D 71/68 (2006.01); B01D 71/80 (2006.01); C08F 212/08 (2006.01); C08F 226/06 (2006.01); C08J 5/18 (2006.01); C08K 3/22 (2006.01); C08L 53/00 (2006.01); C08L 81/06 (2006.01)
CPC B01D 67/00111 (2022.08) [B01D 67/0009 (2013.01); B01D 69/02 (2013.01); B01D 71/281 (2022.08); B01D 71/44 (2013.01); B01D 71/68 (2013.01); B01D 71/80 (2013.01); C08F 212/08 (2013.01); C08F 226/06 (2013.01); C08J 5/18 (2013.01); C08K 3/22 (2013.01); C08L 53/00 (2013.01); C08L 81/06 (2013.01); B01D 2325/0233 (2022.08); C08K 2003/2241 (2013.01); C08K 2201/011 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for forming a film comprising an isoporous surface region and an asymmetric pore region, wherein the isoporous surface region is disposed on at least a portion of an exterior surface of the asymmetric pore region, comprising:
forming a first film from a deposition solution comprising
one or more multiblock copolymer(s),
one or more homopolymer(s),
two or more solvents, and
optionally, one or more metal salt(s),
allowing the first film to stand for a period of time such that at least a portion of the two or more solvents is removed from the film and at least a portion of the one or more multiblock copolymer(s) migrates to an exterior surface of the first film and a second film is formed; and
contacting the second film with a phase separation solvent system, such that the film comprising an isoporous surface region and an asymmetric pore region is formed.