Hybrid anion exchange membranes with self‐assembled ionic channels

Abstract

A novel strategy for fabricating nanocomposite anion exchange membranes (AEM), which can construct self-assembled ionic channels via in situ Menshutkin reaction, is proposed. The TEM image of a nanocomposite AEM based on chloromethylated polysulfone (CMPSF) and functionalized polyhedral oligomeric silsesquioxane (POSS) confirms the existence of core-shell clusters. The ionic conductivity of these nanocomposite AEMs shows a notable increase when the content of functionalized POSS exceeds the percolation threshold. Furthermore, the optimized nanocomposite AEM has higher ionic conductivity than the control AEM with similar ion-exchange capacity due to the well-developed morphology. K E Y W O R D Sanion exchange membrane, ionic channel, Menshutkin reaction, self-assembly

Enhancement of Hydroxide Conduction by Incorporation of Metal–Organic Frameworks into a Semi-Interpenetrating Network

“…The fundamental purpose of this study was to synthesize AEMs with high hydroxide ion conductivities and good dimensional stabilities. It has long been known that the ion conductivities of AEMs are commonly governed by three factors: the ion intrinsic mobility, ion-exchanging group density, and nanochannel morphology. − Generally, higher concentrations of quaternary functional groups, which yield higher IECs, result in excessive WU . On the other hand, one of the necessities of anion transportation and nanochannel continuity is the appropriate water content in AEMs, but the dimensional stability was reduced by excessive WU .…”

An engineered POSS drug delivery system for copper(ii) anticancer metallodrugs in a selective application toward melanoma cells

“…S4B †), respectively. 51,52 Since only six atzac ligand units were inserted on functionalized POSS-Cl, the bands assigned to ν(C-Cl) remain in their structures at 696 cm −1 . On the other hand, the bands of pure copper(II) complexes (Fig.…”

Achieving High Conductivity at Low Ion Exchange Capacity for Anion Exchange Membranes with Electrospun Polyelectrolyte Nanofibers

“…Apart from increasing the IEC, construction of ion transport channels has been verified to be an efficient approach to promote ion conduction. The main methods include microphase separation, − interpenetrating polymer networks, − nanocomposites, − and so forth. As one of the most representative methods, microphase separation introduces a continuous phase which is functionalized with ion exchange groups, leading to high conductivity and good mechanical properties at low IEC.…”