In-situ synthesis of cross-linked imidazolium functionalized Poly(styrene-b-isobutylene-b-styrene) for anion exchange membranes

The cross-linked imidazolium functionalized anion-exchange membranes is in-situ prepared via reaction of chloromethylated poly(styrene-b-isobutylene-b-styrene) with 1,1’-(1,6-hexanediyl)bisimidazole and N-methylimidazole. composite a small amount modified graphene oxide grafted octadecyl propyl phenyl could be further prepared. These exhibit significantly high chemical stability ionic conductivity (σ), marked by low methanol permeability, together improved dynamic mechanical properties. reaches 2.09 × 10−2 S cm−1 at 80 °C introduction 0.5 wt% loading oxide. This membrane also behaves an excellent σ can remain ca. 82% the original value after immerged in strong alkaline medium (2 M NaOH) 60 for 500 h, which almost same as that (ca. 82%) commercial Nafion 115 acid H2SO4) h. characterized promising anion exchange materials fuel cell its conductivity, permeability.