Liu, Zhiru published the artcileStructure-property relationship of poly(2,6-dimethyl-1,4-phenylene oxide) anion exchange membranes with pendant sterically crowded quaternary ammoniums, Recommanded Product: 1-Iodohexane, the publication is Journal of Membrane Science (2021), 119693, database is CAplus.
Steric hindrance engineering is of great significance to the preparation of new stable organic cations and durable polymeric anion exchange membrane materials. In this work, we presented a study of the structure-property relationship in quaternized poly (2,6-dimethyl-1,4-phenylene oxide) containing bulky Pr, iso-Pr, or cyclohexyl-functionalized quaternary ammonium moieties. To our surprise, PPO-iP membranes possessing isopropyl-based QA cations showed higher water uptake than n-propyl- and cyclohexyl-containing analogs (PPO-nP and PPO-CH), in which obvious microphase-separated morphol. was found. Thus, PPO-iP membranes displayed the highest hydroxide conductivity at 20°C in water (37.3 mS/cm, IEC = 1.90 mmol/g). A standard protocol (1 M or 2 M NaOH at 60°C) was used to determine the chem. stability of model cations and membranes both having sterically crowded QAs. Minor loss (<2%) in conductivity was observed for PPO-CH membranes after the treatment in 2 M NaOH at 60°C for 216 h, highlighting the excellent alk. stability, while significant degradation of PPO-iP and PPO-nP was confirmed by NMR characterization of the aged samples. In addition, the prepared PPO-based AEMs having sterically crowded QA cations were compared in alk. H2/O2 fuel cells, demonstrating that the highly conductive PPO-iP membrane exhibited a peak power d. of 182 mW/cm2 under optimized testing conditions.
Journal of Membrane Science published new progress about 638-45-9. 638-45-9 belongs to iodides-buliding-blocks, auxiliary class Iodide,Aliphatic hydrocarbon chain, name is 1-Iodohexane, and the molecular formula is C6H13I, Recommanded Product: 1-Iodohexane.
Referemce:
https://en.wikipedia.org/wiki/Iodide,
Iodide – an overview | ScienceDirect Topics – ScienceDirect.com