(14h) Synthesis of Anion-Exchange Membranes for Applications Artificial Photosynthesis and in CO2 Capture

Anion exchange materials are fundamental components of fuel cells and solar fuel generators, as polymer electrolyte and polymer membrane, attributed to its flexibility and ease of fabrication. Herein we report the synthesis and characterization of anion conducting membranes derived from poly(phenylene oxide) (PPO) and poly(epichlorohydrin) (PECH) precursors. A variety of ionic groups including quaternized ammonium with different alky substituents, and imidazolium were attached to the PPO and PECH backbone. A range of compositions were synthesized, and gas permeabilities, and ionic conductivities were measured as a function of ionic content. The stability of the ionomers under harsh alkaline conditions was confirmed by thermogravimetric analysis and infrared spectroscopy. The properties of the PPO- and PECH-derived ionic membranes  are presented within the context of solar fuels generation, and as materials for CO₂ capture.