公开(公告)号：US12220691B2

公开(公告)日：2025-02-11

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

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.

公开(公告)号：US11969723B2

公开(公告)日：2024-04-30

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 ,  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.