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    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS
    1.
    发明申请
    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS 有权

    公开(公告)号：US20230013531A1

    公开(公告)日：2023-01-19

    申请号：US17901985

    申请日：2022-09-02

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Sangwoo LEE ,  Chulsung BAE ,  Carrie Lynn TRANT

    IPC: B01J41/14 ,  C08J5/22 ,  C08F212/32 ,  C08F212/08

    Abstract: An anion exchange membrane is composed of a copolymer of 1,1-diphenylethylene and one or more styrene monomers, such as 4-tert-butylstyrene. The copolymer includes a backbone substituted with a plurality of ionic groups coupled to phenyl groups on the backbone via hydrocarbyl tethers between about 1 and about 7 carbons in length. High-temperature conditions enabled by these copolymers enhance conductivity performance, making them particularly suitable for use in anion exchange membranes in fuel cells, electrolyzers employing hydrogen, ion separations, etc. The properties of the membranes can be tuned via the degree of functionalization of the phenyl groups and selection of the functional groups, such as quaternary ammonium groups. Several processes can be used to incorporate the desired ionic functional groups into the polymers, such as chloromethylation, radical bromination, Friedel-Crafts acylation and alkylation, sulfonation followed by amination, or combinations thereof.

    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS
    3.
    发明公开
    THERMALLY STABLE HYDROCARBON-BASED ANION EXCHANGE MEMBRANE AND IONOMERS 审中-公开

    公开(公告)号：US20240286123A1

    公开(公告)日：2024-08-29

    申请号：US18607624

    申请日：2024-03-18

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Sangwoo LEE ,  Chulsung BAE ,  Carrie Lynn TRANT

    IPC: B01J41/14 ,  C08F212/08 ,  C08F212/32 ,  C08J5/22

    CPC classification number: B01J41/14 ,  C08F212/08 ,  C08F212/32 ,  C08J5/2231 ,  C08J2325/08

    Abstract: An anion exchange membrane is composed of a copolymer of 1,1-diphenylethylene and one or more styrene monomers, such as 4-tert-butylstyrene. The copolymer includes a backbone substituted with a plurality of ionic groups coupled to phenyl groups on the backbone via hydrocarbyl tethers between about 1 and about 7 carbons in length. High-temperature conditions enabled by these copolymers enhance conductivity performance, making them particularly suitable for use in anion exchange membranes in fuel cells, electrolyzers employing hydrogen, ion separations, etc. The properties of the membranes can be tuned via the degree of functionalization of the phenyl groups and selection of the functional groups, such as quaternary ammonium groups. Several processes can be used to incorporate the desired ionic functional groups into the polymers, such as chloromethylation, radical bromination, Friedel-Crafts acylation and alkylation, sulfonation followed by amination, or combinations thereof.

    ALKALINE ANION EXCHANGE MEMBRANES DERIVED FROM DIPHENYLETHYLENE AND CO-MONOMER FEEDSTOCK
    5.
    发明申请
    ALKALINE ANION EXCHANGE MEMBRANES DERIVED FROM DIPHENYLETHYLENE AND CO-MONOMER FEEDSTOCK 有权

    公开(公告)号：US20220072529A1

    公开(公告)日：2022-03-10

    申请号：US17527652

    申请日：2021-11-16

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Sangwoo LEE ,  Chulsung BAE ,  Musashi J. BRIEM ,  Sungmin PARK

    IPC: B01J41/07 ,  B01D61/44 ,  B01D71/06 ,  B01J41/14 ,  B01J47/12 ,  C02F1/469 ,  C08F212/32 ,  C08J5/22

    Abstract: The anion exchange membranes exhibit enhanced chemical stability and ion conductivity when compared with traditional styrene-based alkaline anion exchange membranes. A copolymer backbone is polymerized from a reaction medium that includes a diphenylalkylene and an alkadiene. The copolymer includes a plurality of pendant phenyl groups. The diphenyl groups on the polymer backbone are functionalized with one or more haloalkylated precursor substrates. The terminal halide from the precursor substrate can then be substituted with a desired ionic group. The diphenylethylene-based alkaline anion exchange membranes lack the α-hydrogens sharing tertiary carbons with phenyl groups from polystyrene or styrene-based precursor polymers, resulting in higher chemical stability. The ionic groups are also apart from each other by about 3 to 6 carbons in the polymer backbone, enhancing ion conductivity. These membrane are advantageous for use in fuel cells, electrolyzers employing hydrogen, ion separations, etc.

    PREPARATION OF ION EXCHANGE MEMBRANES FROM POLYOLEFINS AND POLYCYCLIC OLEFINS
    6.
    发明申请
    PREPARATION OF ION EXCHANGE MEMBRANES FROM POLYOLEFINS AND POLYCYCLIC OLEFINS 有权

    公开(公告)号：US20210380771A1

    公开(公告)日：2021-12-09

    申请号：US17282512

    申请日：2019-10-07

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Chulsung BAE ,  Jong Yeob JEON

    IPC: C08J5/22 ,  C08F210/18 ,  C08L23/08 ,  C08F210/02

    Abstract: Ion exchange membranes for use in electrochemical energy conversion and storage applications include copolymers having a backbone produced from an olefin, such as ethylene, and a cyclic olefin, such as norbornene. Haloalkyl side chains with terminal halide groups are connected to the polymer backbone via Friedel-Crafts alkylation. The halide groups are then replaced with ionic groups via substitution. The ion exchange membrane material can then be cast or impregnated into a reinforcing mesh to form cation exchange membrane or anion exchange membranes. Rigidity of the ion exchange membranes can be controlled by varying the ratio of olefin to cyclic olefin in the polymer backbone.

    ELASTIC SULFONATED STYRENE DIENE BLOCK COPOLYMERS
    7.
    发明申请
    ELASTIC SULFONATED STYRENE DIENE BLOCK COPOLYMERS 有权

    公开(公告)号：US20210171727A1

    公开(公告)日：2021-06-10

    申请号：US16770666

    申请日：2018-12-06

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Chulsung BAE

    IPC: C08J5/22 ,  C08L53/02 ,  C08L25/08 ,  C08L81/06 ,  C08L65/02 ,  C08L71/12 ,  C08F36/06 ,  C08F36/08 ,  C08F8/04 ,  C08F8/06 ,  C08F8/36 ,  C08K5/37 ,  H01M8/1023 ,  H01M8/1072 ,  H01M8/1088

    Abstract: The electrochemical energy conversion system include an anode, a cathode, and a proton exchange membrane disposed between the anode and the cathode. The proton exchange membrane includes a polymer having a hard block polymer, a soft block polymer, and one or more hydrophilic functional groups attached to the soft block polymer. The glass transition temperature of the hard block polymer is higher than a glass transition temperature of the soft block polymer, such that the hard block polymer is non-elastic and the soft block polymer is elastic at a desired operating temperature. The hydrophilic functional groups are attached to the soft block polymer via a thiol-ene reaction to modify double bonds in the soft block polymer. The swellable functional groups are selectively connected to the soft domains of the block copolymers, so that when the membrane swells (under hydration or gas adsorption), the stress is effectively absorbed by the soft domain and the impact on overall mechanical properties is minor, resulting in more durable membranes.

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