公开(公告)号：US20220410078A1

公开(公告)日：2022-12-29

申请号：US17756338

申请日：2020-11-21

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jinsheng Zhou ,  Kuan-Yin Lin ,  James C. DeLozier ,  David S. Hays

IPC: B01D69/02 ,  B01D69/08 ,  B01D71/70 ,  B01D71/56 ,  B01D71/76 ,  B01D53/22 ,  B01D67/00 ,  B01D69/10

Abstract: Hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores and including at least one semi-crystalline thermoplastic polyolefin (co)polymer. A skin layer including at least one polydiorganosiloxane polyoxamide copolymer overlays the porous substrate. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

公开(公告)号：US20210331120A1

公开(公告)日：2021-10-28

申请号：US17309691

申请日：2019-12-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kuan-Yin Lin ,  James C. DeLozier ,  Aurore Y.J. Mercelat ,  Mark McCormick ,  Jinsheng Zhou

IPC: B01D69/02 ,  B01D69/08 ,  B01D71/26 ,  B01D53/22 ,  B01D67/00

Abstract: Hollow fiber membranes, membrane contactors, and related production and use methods. The membranes include a substrate having a multiplicity of pores and a skin layer overlaying the porous substrate. The porous substrate includes a first semi-crystalline thermoplastic polyolefin (co)polymer resin and a nucleating agent in an amount effective to achieve nucleation. The skin layer includes a second semi-crystalline thermoplastic polyolefin (co)polymer resin derived by polymerizing at most 98 wt. % of 4-methyl-1-pentene monomer with at least 2 wt. % of linear or branched alpha olefin monomers. Preferably, the first thermoplastic polyolefin (co)polymer is different from the second thermoplastic polyolefin (co)polymer. The skin layer is less porous than the porous substrate and forms an outer surface of the hollow fiber with the porous substrate forming an inner surface. The hollow fibers are formed by co-extruding the porous substrate resin and the skin layer resin through an annular die.

公开(公告)号：US11883777B2

公开(公告)日：2024-01-30

申请号：US17309688

申请日：2019-12-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kuan-Yin Lin ,  James C. DeLozier ,  Mark McCormick ,  Aurore Y. J. Mercelat ,  Jinsheng Zhou

IPC: B01D53/22 ,  B01D67/00 ,  B01D69/02 ,  B01D69/08 ,  B01D71/76 ,  B01D71/26

CPC classification number: B01D53/228 ,  B01D67/0025 ,  B01D69/02 ,  B01D69/088 ,  B01D71/262 ,  B01D71/76 ,  B01D67/0083 ,  B01D2256/10 ,  B01D2256/245 ,  B01D2257/104 ,  B01D2257/504 ,  B01D2325/023 ,  B01D2325/027 ,  B01D2325/04

Abstract: Asymmetric hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores, the porous substrate including at least a first semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at most 3 wt. % of linear or branched alpha olefin monomers with at least 97 wt. % of 4-methyl-1-pentene monomer. The asymmetric hollow fiber membranes also include a skin layer overlaying the porous substrate, the skin layer including a second semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at least 2 wt. % of linear or branched alpha olefin monomers with at most 98 wt. % of 4-methyl-1-pentene monomer. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.

公开(公告)号：US20170173535A1

公开(公告)日：2017-06-22

申请号：US15300022

申请日：2015-04-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Xuan Jiang ,  Kuan-Yin Lin ,  Michelle M Mok ,  Naiyong Jing ,  Derek J. Dehn ,  Richard J. Pokorny ,  Ta-Hua Yu

IPC: B01D61/14 ,  H01M2/16 ,  B01D71/02 ,  B01D69/12 ,  B01D67/00

CPC classification number: B01D61/147 ,  B01D61/145 ,  B01D67/0039 ,  B01D67/0044 ,  B01D67/0069 ,  B01D67/0079 ,  B01D67/0088 ,  B01D69/10 ,  B01D69/105 ,  B01D69/12 ,  B01D69/148 ,  B01D71/027 ,  B01D71/028 ,  B01D71/38 ,  B01D2325/022 ,  H01M2/166 ,  H01M2/1686

Abstract: Articles are described including a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and a first silica layer directly attached to the first major surface of the first microfiltration membrane layer. The first silica layer includes a polymeric binder and acid-sintered interconnected silica nanoparticles arranged to form a continuous three-dimensional porous network. A method of making an article is also described, including providing a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and forming a first silica layer on the first major surface.

公开(公告)号：US10328389B2

公开(公告)日：2019-06-25

申请号：US15300022

申请日：2015-04-03

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Xuan Jiang ,  Kuan-Yin Lin ,  Michelle M Mok ,  Naiyong Jing ,  Derek J. Dehn ,  Richard J. Pokorny ,  Ta-Hua Yu

IPC: H01M2/16 ,  B01D61/14 ,  B01D67/00 ,  B01D69/10 ,  B01D69/12 ,  B01D69/14 ,  B01D71/02 ,  B01D71/38

Abstract: Articles are described including a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and a first silica layer directly attached to the first major surface of the first microfiltration membrane layer. The first silica layer includes a polymeric binder and acid-sintered interconnected silica nanoparticles arranged to form a continuous three-dimensional porous network. A method of making an article is also described, including providing a first microfiltration membrane layer having a first major surface and a second major surface disposed opposite the first major surface, and forming a first silica layer on the first major surface.

公开(公告)号：US20220062816A1

公开(公告)日：2022-03-03

申请号：US17309688

申请日：2019-12-23

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Kuan-Yin Lin ,  James C. DeLozier ,  Mark McCormick ,  Aurore Y.J. Mercelat ,  Jinsheng Zhou

IPC: B01D53/22 ,  B01D69/02 ,  B01D69/08 ,  B01D71/26 ,  B01D71/76 ,  B01D67/00

Abstract: Asymmetric hollow fiber membranes, membrane contactors, and related production and use methods. The asymmetric hollow fiber membranes include a porous substrate having a multiplicity of pores, the porous substrate including at least a first semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at most 3 wt. % of linear or branched alpha olefin monomers with at least 97 wt. % of 4-methyl-1-pentene monomer. The asymmetric hollow fiber membranes also include a skin layer overlaying the porous substrate, the skin layer including a second semi-crystalline thermoplastic polyolefin copolymer derived by polymerizing at least 2 wt. % of linear or branched alpha olefin monomers with at most 98 wt. % of 4-methyl-1-pentene monomer. The skin layer is less porous than the porous substrate and forms an outer surface of the asymmetric hollow fiber membrane, while the porous substrate forms an inner surface of the hollow fiber membrane. The skin layer is preferably nonporous.