Quaternary phosphonium-based polyelectrolyte was synthesized from bromomethylated poly（2,6-dimethyl-1,4- phenylene oxide） （BPPO） by functionalization with tris（2,4,6-trimethoxyphenyl） phosphine （TTMPP）. Typica...Quaternary phosphonium-based polyelectrolyte was synthesized from bromomethylated poly（2,6-dimethyl-1,4- phenylene oxide） （BPPO） by functionalization with tris（2,4,6-trimethoxyphenyl） phosphine （TTMPP）. Typically, excellent solubility of the polyelectrolyte in polar solvents, such as NMP and DMSO, allowed a solution-casting strategy for preparation of anion exchange membrane （AEM） with properly ordered hydrophilic/hydrophobic nano-scale phase separation morphology, which was visible in atomic force microscopic phase images. Accordingly, the optimized ionmeric AEM exhibited excellent hydroxide conductivity of 110 mS/cm at 70℃, but extremely re- stricted linear expansion ratio of below 7% at the same temperature. Additionally, such membrane could maintain flexibility and conductivity after an immersion treatment in 1 mol/L NaOH solution at 60 ℃ for about 100 h, im- plying its potential in alkaline fuel cells.展开更多
基金the Nationa1Basic Research Program of China(No．20 1 2CB932800)．the Nationa1 Natural Science Foundation of China (Nos．21106140,21025626,20974106)the Programs ofAnhui Province for Science and Technology (No．11010202157)
文摘Quaternary phosphonium-based polyelectrolyte was synthesized from bromomethylated poly（2,6-dimethyl-1,4- phenylene oxide） （BPPO） by functionalization with tris（2,4,6-trimethoxyphenyl） phosphine （TTMPP）. Typically, excellent solubility of the polyelectrolyte in polar solvents, such as NMP and DMSO, allowed a solution-casting strategy for preparation of anion exchange membrane （AEM） with properly ordered hydrophilic/hydrophobic nano-scale phase separation morphology, which was visible in atomic force microscopic phase images. Accordingly, the optimized ionmeric AEM exhibited excellent hydroxide conductivity of 110 mS/cm at 70℃, but extremely re- stricted linear expansion ratio of below 7% at the same temperature. Additionally, such membrane could maintain flexibility and conductivity after an immersion treatment in 1 mol/L NaOH solution at 60 ℃ for about 100 h, im- plying its potential in alkaline fuel cells.
