Ionic functionalization of aromatic polymers for ion exchange membranes

Bae, Chulsung; Park, Eun Joo; Noh, Sangtaik; Pagels, Michael

Ionic functionalization of aromatic polymers for ion exchange membranes

Patent · Mon Nov 27 23:00:00 EST 2023

OSTI ID:2293904

Bae, Chulsung; Park, Eun Joo; Noh, Sangtaik; Pagels, Michael

The electrochemical energy conversion system of the present disclosure includes an anode, a cathode, and an ion exchange membrane including a polymer having an aromatic polymer chain and an alkylated substrate including an alkyl chain, and at least one ionic group. The alkylated substrate is bound to at least one aromatic group in the polymer chain via Friedel-Crafts alkylation of the at least one aromatic group. The alkylation reaction utilizes a haloalkylated tertiary alcohol or a haloalkylated alkene as a precursor. In the presence of an acid catalyst, a carbocation is generated in the precursor which reacts with the aromatic rings of the polymer chain. The at least one ionic group is then replaced with a desired cationic or anionic group using a substitution reaction. The membranes exhibit advantageous stability achieved through a simplified and scalable reaction scheme.

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Research Organization:: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States); Rensselaer Polytechnic Inst., Troy, NY (United States)

Sponsoring Organization:: USDOE; National Science Foundation (NSF)

DOE Contract Number:: AC52-06NA25396; AR0000769

Assignee:: Rensselaer Polytechnic Institute (Troy, NY)

Patent Number(s):: 11,826,746

Application Number:: 17/658,627

OSTI ID:: 2293904

Country of Publication:: United States

Language:: English

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