Optimized Pore‐Filled <scp>PTFE</scp> Anion Exchange Membranes Incorporating Graphene Oxide for Durable Electrochemical Applications

ABSTRACT Pore‐filled anion exchange membranes (AEMs) were fabricated by impregnating a porous polytetrafluoroethylene (PTFE) support with a cross‐linked poly (vinyl benzyl chloride) (PVBC) matrix and graphene oxide (GO) nanoparticles. The influence of GO loading (0.5–7 wt%) on membrane performance was evaluated. Structural and thermal analyses confirmed uniform pore filling and stable GO integration within the polymer matrix. The optimized membrane containing 5 wt% GO exhibited an ion exchange capacity of 1.47 meq/g, water uptake of 48%, and tensile strength of 24.85 MPa, along with improved hydrophilicity and alkaline stability. Excessive GO incorporation led to nanoparticle agglomeration and performance decline. Compared with previously reported PTFE‐based AEMs, the developed membranes combine enhanced mechanical robustness with competitive conductivity and chemical stability. These results demonstrate that controlled nanoparticle incorporation is a promising strategy to improve the durability of AEMs for electrochemical energy and water treatment applications.