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• W3138553690 abstract "Abstract A series of alkaline anion exchange membranes (AAEMs) based on poly(2,6‐dimethyl‐1,4‐phenylene oxide) (PPO) with multi‐cation side chain containing piperidinium group were fabricated via nucleophilic substitution and Menshutkin reaction. The chemical structures of the AAEMs (PPO‐AMP‐X) were determined by Fourier transform infrared and proton nuclear magnetic resonance spectra. The resultant PPO‐AMP‐X membranes with the ion exchange capacities (IECs) of 2.05–2.77 mmol g −1 displayed the hydroxide conductivities in the range of 61.04–78.92 mS cm −1 at 80°C. When tested at the same degree of functionalization levels, the PPO‐AMP‐X membranes exhibited significantly higher hydroxide conductivity and lower conductivity loss than conventional AAEMs bearing benzyltri‐methylammonium group (PPO‐TMA). The PPO‐AMP‐28 multi‐cation membrane showed a hydroxide conductivity of 70.52 mS cm −1 at 80°C, which was nearly two times higher than that of the PPO‐TMA‐28 single‐cation membrane (36.74 mS cm −1 ). Compared with PPO‐TMA‐28 (56.76% decrease), the hydroxide conductivity of PPO‐AMP‐28 merely decreased by 23.15% after soaked in 1 M KOH at 80°C for 500 h. Additionally, the PPO‐AMP‐X membranes displayed moderate mechanical properties and good thermal stabilities, which can meet the basic requirements for use in fuel cells. This study provides a facile method for preparing AAEMs with multi‐cation side chain containing piperidinium group." @default.
• W3138553690 created "2021-03-29" @default.
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• W3138553690 date "2021-03-17" @default.
• W3138553690 modified "2023-09-28" @default.
• W3138553690 title "Multi‐cation side‐chain‐type containing piperidinium group poly(2,6‐dimethyl‐1,4‐phenylene oxide) alkaline anion exchange membranes" @default.
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• W3138553690 doi "https://doi.org/10.1002/app.50736" @default.
• W3138553690 hasPublicationYear "2021" @default.
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