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    Alkaline anion exchange membranes derived from diphenylethylene and co-monomer feedstock
    21.
    发明授权
    Alkaline anion exchange membranes derived from diphenylethylene and co-monomer feedstock 有权

    公开(公告)号：US11207672B2

    公开(公告)日：2021-12-28

    申请号：US17287639

    申请日：2019-10-22

    Applicant: RENSSELAER POLYTECHNIC INSTITUTE

    Inventor： Sangwoo Lee ,  Chulsung Bae ,  Musashi J. Briem ,  Sungmin Park

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

    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.

    CROSSLINKING OF AROMATIC POLYMERS FOR ANION EXCHANGE MEMBRANES
    22.
    发明申请
    CROSSLINKING OF AROMATIC POLYMERS FOR ANION EXCHANGE MEMBRANES 有权

    公开(公告)号：US20210108067A1

    公开(公告)日：2021-04-15

    申请号：US17050256

    申请日：2019-04-24

    Applicant: Rensselaer Polytechnic Institute

    Inventor： Chulsung Bae ,  Jong Yeob Jeon ,  Junyoung Han ,  Sangtaik Noh

    IPC: C08L53/02 ,  C08J5/22 ,  B01D69/02 ,  B01D67/00 ,  B01D71/26 ,  B01D71/28 ,  B01D71/80 ,  B01D71/82 ,  B01J41/14

    Abstract: An ion exchange membrane material is composed of a crosslinked polymer network including a first poly(styrene-b-ethylene-r-butylene-b-styrene) triblock copolymer (SEBS), and second SEBS, and a linker crosslinking the first SEBS and the second SEBS. At least one phenyl group from the first SEBS and the second SEBS is functionalized with an alkyl group, and the carbon at the benzylic position of these alkyl groups is saturated with at least two additional alkyl groups. The linker is a diamine bound to the alkyl functional groups. The ion exchange membrane material is made via a substantially simultaneous quaternization and crosslinking reaction between the diamine linker and SEBS functionalized with alkyl halide groups. Increasing concentration of crosslinker in produces membranes with reduced water uptake, leading to an expectation of enhanced stability under hydrated conditions and greater durability. Advantageously, this reduction in water uptake came with little change to ion exchange capacity.

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