公开(公告)号：US20230028271A1

公开(公告)日：2023-01-26

申请号：US17785337

申请日：2020-12-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Mathias Stroschke ,  Stefan Weuster

IPC: B01D67/00 ,  B01D71/68

Abstract: The present disclosure provides a method for treating the surface of a microporous polymeric membrane, comprising immersing a microporous polymeric membrane in a liquid; and applying ultrasonic waves to the microporous polymeric membrane immersed in the liquid.

公开(公告)号：US20210229043A1

公开(公告)日：2021-07-29

申请号：US17053848

申请日：2019-05-29

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Daniel Malek ,  Stefan Weuster ,  Frank Schneider ,  Alexey Kurov ,  Andreas Holt

IPC: B01D69/02 ,  B01D69/08 ,  B01D71/68 ,  B01D61/14

Abstract: The present disclosure provides a hydrophilic, integrally asymmetric, semi-permeable hollow-fiber membrane made from a hydrophobic aromatic sulfone polymer and at least one hydrophilic polymer, the membrane comprising an inner surface facing towards its lumen, an outer surface facing outwards and an intermediate wall having a wall thickness and comprising an open-pore separating layer and an supporting layer having an asymmetric, sponge-like structure without finger pores, wherein adjoining to the wall of the inner surface the hollow-fiber membrane comprises an essentially isotropic zone; after which the pore size abruptly start increasing up to a maximum, after which the pore size decrease again, then adjoining an essentially isotropic supporting layer which then is adjoined by the outer surface, wherein the separating layer has a cut-off of greater than 300 000 Daltons. The present disclosure further provides a method for producing such membranes and a use of the membranes for microfiltration purposes.

公开(公告)号：US20240042396A1

公开(公告)日：2024-02-08

申请号：US18266484

申请日：2021-12-06

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Oliver Schuster ,  Neelakandan Chandrasekaran ,  Detlef Krieter ,  Stefan Weuster ,  Holger Gottschalk

IPC: B01D71/68 ,  B01D69/08 ,  B01D67/00 ,  B01D71/74 ,  B01D61/24

CPC classification number: B01D71/68 ,  B01D69/08 ,  B01D67/0088 ,  B01D71/74 ,  B01D61/246

Abstract: A polymeric membrane. The membrane can include a polymeric membrane made from a polymer selected from an aromatic sulfone polymer, polyamide, cellulose, cellulose acetate, polymethylmethacrylate, polyvinylalcohol, and polyacrylnitril, wherein the polymeric membrane has a major surface; a stilbenoid, isoflavone or flavone coated on the major surface of the polymeric membrane.

公开(公告)号：US20220203308A1

公开(公告)日：2022-06-30

申请号：US17610683

申请日：2020-06-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Frank Schneider ,  Stefan Weuster ,  Daniel P. Malek ,  Mathias Stroschke

IPC: B01D71/82 ,  B01D69/08 ,  B01D71/68 ,  B01D61/14

Abstract: The present disclosure provides a process for producing a modified microporous membrane, comprising (i) Providing a first solution comprising at least one first polymer and at least one epoxy functional compound; (ii) Providing a second solution comprising at least one diamine compound; (iii) Bringing the first solution and the second solution into contact, thereby obtaining a modified microporous membrane comprising at least one first polymer and the crosslinked reaction product of the at least one epoxy functional compound and the at least one diamine compound; wherein the modified microporous membrane is a hollow-fiber membrane; and wherein the first solution is a dope solution, the second solution is a bore solution, and bringing the first and second solutions into contact takes place in a spinneret.