Effect of a Sulfonated Benzothiadiazole Unit on the Morphology and Ion Conduction Behavior of a Polymer Electrolyte Membrane
Effect of a Sulfonated Benzothiadiazole Unit on the Morphology and Ion Conduction Behavior of a Polymer Electrolyte Membrane
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DOI：
10.1021/acs.iecr.8b02446
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发表时间：
2018-09
影响因子：
4.2
通讯作者：
S. Amari;S. Ando;Shoji Miyanishi;Takeo Yamaguchi
中科院分区：
文献类型：
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作者：
S. Amari;S. Ando;Shoji Miyanishi;Takeo Yamaguchi
从改善离子传导膜，特别是质子交换膜（PEM）的物理性质的观点来看，使用共轭聚合物获得明确限定的纳米通道已经吸引了大量的关注。本研究的目的是提出一种新的和简单的分子设计概念的芳香族无规共聚物的基础上磺化苯并噻二唑（SBT）单元诱导纳米结构。使用原子力显微镜（AFM），它被证实，在磺化[聚（亚芳基醚砜）]膜中引入少量的SBT单元诱导显着的亲水性和疏水性域聚集。此外，这些形态转变提供了膜中质子载体密度的高密度，并且即使在低湿度条件下（在30%RH下为2.0mS/cm）也能够实现有效的质子传导性。这些结果表明，SBT单元是构建有利于离子传输的纳米结构和提高质子交换膜离子电导率的关键触发器。
From the viewpoint of improving the physical properties of ion conducting membranes, especially proton exchange membranes (PEMs), obtaining well-defined nanochannels using conjugated polymers has attracted a significant amount of attention. This study aims to propose a novel and simple molecular design concept for aromatic random copolymers based on sulfonated benzothiadiazole (SBT) units to induce nanostructuring. Using atomic force microscopy (AFM), it is confirmed that introducing a small amount of the SBT unit in the sulfonated [poly(arylene ether sulfone)] membrane induced significant hydrophilic and hydrophobic domain aggregation. Furthermore, these morphological transformations provided high density of proton carrier density in membrane and enabled effective proton conductivity even under low humidity condition (2.0 mS/cm at 30% RH). These results indicate that the SBT unit is a key trigger for constructing favorable nanostructure for ion transport and improving ion conductivity in the proton excha...