Anion conductive aromatic polymers containing fluorenyl groups: Effect of the position and number of ammonium groups
Anion conductive aromatic polymers containing fluorenyl groups: Effect of the position and number of ammonium groups
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DOI：
10.1002/pola.27928
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发表时间：
2016-04
期刊：
影响因子：
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通讯作者：
M. Shimada;S. Shimada;J. Miyake;M. Uchida;K. Miyatake
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文献类型：
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作者：
M. Shimada;S. Shimada;J. Miyake;M. Uchida;K. Miyatake
介绍了以氟酰二苯基为骨架的阴离子导电芳嵌段共聚物QPE‐bl‐3、QPE‐bl‐3 M2和M4的合成及其性能。这些共聚物具有相同的主链结构，但氟芴基上铵基的位置和数目不同。通过典型的氯甲基化反应或用预胺化单体得到了高分子量的季铵化嵌段共聚物，并通过¹H NMR谱进行了表征。采用溶液铸造法制备了自立型可弯曲膜。QPE‐bl‐3 M4膜中每个亲水重复单元含有四个铵基（最高铵密度），表现出良好的相分离形态，而QPE‐bl‐3膜中每个亲水重复单元含有两个铵基，表现出高阴离子导电性。QPE‐bl‐3膜（IEC = 2.1 meq/g）在80°C水中获得了最高的阴离子电导率（104 mS/cm）。在电流密度为161 mA/cm²的情况下，H₂/O₂碱性燃料电池的最大功率密度为62 mW/cm²。©2015 Wiley期刊公司j .变异较大。科学。A部分：Polym。化学，2016,54,935-944
Synthesis and properties of anion conductive aromatic block copolymers, QPE‐bl‐3, QPE‐bl‐3 M2, and M4, containing fluorenylidene biphenylene groups as scaffold for ammonium groups are described. These copolymers share the same main chain structure, but the position and the number of ammonium groups on a fluorenyl group differ. High molecular weight quaternized block copolymers were obtained via typical chloromethylation reaction or using preaminated monomers, and were well‐characterized by ¹H NMR spectra. Self‐standing bendable membranes were obtained by solution casting. QPE‐bl‐3 M4 membranes containing four ammonium groups per hydrophilic repeat unit (highest ammonium density) in the hydrophilic block exhibited well developed phase‐separated morphology, while QPE‐bl‐3 membranes containing two ammonium groups per hydrophilic repeat unit exhibited high anion conductivity. The highest anion conductivity (104 mS/cm) was obtained with QPE‐bl‐3 membrane (IEC = 2.1 meq/g) at 80 °C in water. An H₂/O₂ alkaline fuel cell was operable with the membrane to achieve 62 mW/cm² of the maximum power density at 161 mA/cm² of the current density. © 2015 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 935–944