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    HOLLOW FIBER MEMBRANES WITH NUCLEATING AGENT AND METHODS OF MAKING AND USING THE SAME
    1.
    发明申请
    HOLLOW FIBER MEMBRANES WITH NUCLEATING AGENT AND METHODS OF MAKING AND USING THE SAME 有权

    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.

    ASYMMETRIC HOLLOW FIBER MEMBRANES AND METHODS OF MAKING AND USING THE SAME
    7.
    发明申请
    ASYMMETRIC HOLLOW FIBER MEMBRANES AND METHODS OF MAKING AND USING THE SAME 有权

    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.

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