Comb-shaped alkyl imidazolium-functionalized poly(arylene ether sulfone)s as high performance anion-exchange membranes

Abstract

Alkyl imidazolium-functionalized poly(arylene ether sulfone)s forming a comb-shaped structure were developed as novel anion exchange membranes.

Configuring Anion‐Exchange Membranes for High Conductivity and Alkaline Stability by Using Cationic Polymers with Tailored Side Chains

“…PAES multiblock copolymers with hydrophilic blocks functionalized with imidazolium cations having C 2 , C 6 , C 12 , and C 16 extenders have been synthesized and studied by Kim and co‐workers . Precursor PAES blocks were coupled under mild conditions to form the block copolymers before benzyl bromination of the dimethyl bisphenol A monomer residues in one of the blocks.…”

“…The thermal decomposition was noted at about 260 °C, and the conductivity of the AEMs in 2 m NaOH at 60 °C showed no significant change up to 300 h, where after a slight decrease for the AEMs with C 6 –C 16 extenders was noted. The materials with C 2 extender chains were found to degrade faster …”

Dual-cation comb-shaped anion exchange membranes: Structure, morphology and properties

“…Excellent nano-phase separated morphology was observed by small angle X-ray scattering (SAXS) due to the unique polymer structure with the hydrophilic main chain and the hydrophobic side chain [10,28,29]. Zhuang and co-workers [6] reported another combshaped AEM prepared by attaching the aliphatic chain onto the polymer backbone but separately from QA group, outstanding high temperature hydroxide conductivity even comparable to the Nafion s was achieved.…”

Imidazolium functionalized poly(vinyl chloride-co-vinyl acetate)-based anion exchange membrane

“…However, the water uptake of the membrane could be contained by fine management of the polymer architecture using the hydrophobic polymer backbone. Phase separation between the hydrophilic and hydrophobic aggregates formed in the structure may provide efficient ion transport, and contribute to the high conductivities for membranes with a low water uptake [9].…”