Polymer Electrolyte Membranes Based on Cross-Linked Highly Sulfonated Multiblock Copoly(ether sulfone)s
Polymer Electrolyte Membranes Based on Cross-Linked Highly Sulfonated Multiblock Copoly(ether sulfone)s
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DOI：
10.1021/ma100903v
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发表时间：
2010-06
期刊：
影响因子：
5.5
通讯作者：
Kazuhiro Nakabayashi;Tomoya Higashihara;M. Ueda
中科院分区：
文献类型：
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作者：
Kazuhiro Nakabayashi;Tomoya Higashihara;M. Ueda
在缩合剂存在下，通过主链中的磺酸基团与作为交联剂的1,4-二苯氧基苯之间的反应，成功制备了基于交联的高度磺化多嵌段共聚（醚砜）（IEC = 2.99−3.40 mequiv/g）的聚合物电解质膜。 HSPx1−3 膜代表交联的 HSP1−3 膜，尽管其 IEC 值较高且引入了交联结构，但在干燥状态下仍表现出良好的机械强度。此外，即使在水合状态下，多嵌段聚合物和交联结构也能抑制HSPx1−3膜不可接受的吸水率和尺寸变化，同时由于其高IEC值，在低相对湿度（30% RH下为10.3−17.6 wt%）下保持相对较高的吸水率。在 30−95% RH（80 °C）范围内，HSPx1−3 膜表现出比 Nafion 117 更高的质子电导率。尤其是IEC值最高的HSPx3膜...
Polymer electrolyte membranes based on cross-linked highly sulfonated multiblock copoly(ether sulfone)s (IEC = 2.99−3.40 mequiv/g) were prepared successfully by the reaction between the sulfonic acid groups in the main chains and 1,4-diphenoxybenzene as a cross-linker in the presence of the condensation agent. The HSPx1−3 membranes, which represent the cross-linked HSP1−3 membranes, demonstrated good mechanical strength in the dry state regardless of their high IEC values and the introduction of the cross-linking structure. Additionally, the multiblock polymer and the cross-linking structure suppressed unacceptable water uptake and dimensional change of the HSPx1−3 membranes even in the hydrated state, while maintaining relatively high water uptake under low relative humidity (10.3−17.6 wt % at 30% RH) due to their high IEC values. The HSPx1−3 membranes showed higher proton conductivity than that of Nafion 117 in the range of 30−95% RH (at 80 °C). Especially, the HSPx3 membrane with the highest IEC value ...