Preparation of metallocene containing cationic polymers for anion exchange applications
AssigneeUniversity of South Carolina
InventorsChuanbing Tang, Tianyu Zhu
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Abstract
Chemically inert, mechanically tough, cationic metallo-polyelectrolytes designed as durable anion-exchange membranes (AEMs) via ring-opening metathesis polymerization (ROMP) of cobaltocenium-containing cyclooctene with triazole as the only linker group, followed by backbone hydrogenation to provide a new class of AEMs with a polyethylene-like framework and alkaline-stable cobaltocenium cation for ion transport, which exhibit excellent thermal, chemical and mechanical stability, as well as high ion conductivity.
Claims7
A method for preparing an anion-exchange membrane comprising:
- performing a catalyzed click reaction to attach a cobaltocenium onto a cycloalkene monomer to provide a cycloalkene attached to the cobaltocenium with a triazole linker group;
- performing ring opening metathesis polymerization of the cycloalkene, and the cobaltocenium containing cycloalkene to provide a cobaltocenium containing copolymer;
- performing backbone hydrogenation of the cobaltocenium containing copolymer to form a hydrogenated cobaltocenium containing copolymer;
- producing a polyethylene-like framework with alkaline-stable cobaltocenium cation for ion transport from the cobaltocenium copolymer;
- and
- forming the cycloalkene attached to the cobaltocenium with a triazole linker group to comprise at least one styrene monomer or at least one norbornene monomer that can be polymerized.
An anion-exchange membrane formed via a reaction scheme comprising:
Dependencies are inferred from the claim text.