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首页> 外文期刊>Journal of industrial and engineering chemistry >Crosslinked poly(ethylene glycol) (PEG)/sulfonated polyhedral oligosilsesquioxane (sPOSS) hybrid membranes for direct methanol fuel cell applications
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Crosslinked poly(ethylene glycol) (PEG)/sulfonated polyhedral oligosilsesquioxane (sPOSS) hybrid membranes for direct methanol fuel cell applications

机译：交联聚乙二醇（PEG）/磺化多面体低聚倍半硅氧烷（sPOSS）混合膜，用于直接甲醇燃料电池应用

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摘要

Organic-inorganic hybrid crosslinked membranes based on poly(ethylene glycol) (PEG) and sulfonated polyhedral oligomeric silsesquioxane (POSS-SO3H) with urethane crosslinks were prepared as candidate materials for a proton exchange membrane for direct methanol fuel cells (DMFC). Infrared (FT-IR) spectroscopy and ion exchange capacity measurements for the hybrid revealed the POSS is incorporated as a part of the crosslinked network. We found that proton conductivity increased and methanol permeability decreased with increasing POSS content in the hybrid membrane. In particular, our hybrid membranes demonstrated proton conductivities comparable to that of Nafion 117 while exhibiting lower methanol permeability as compared to Nafion 117. We postulate that the polar sulfonic acid groups of the incorporated sPOSS cages assemble to provide ion conduction paths while the hydrophobic portions of the same sPOSS cages combine to form a barrier to methanol permeation of the hybrid membrane.
机译：制备了基于聚乙二醇（PEG）和具有氨基甲酸酯交联键的磺化多面体低聚倍半硅氧烷（POSS-SO3H）的有机-无机杂化交联膜，作为直接甲醇燃料电池（DMFC）质子交换膜的候选材料。杂种的红外（FT-IR）光谱和离子交换容量测量表明，POSS作为交联网络的一部分而并入。我们发现，随着杂化膜中POSS含量的增加，质子电导率增加，甲醇渗透率降低。特别是，我们的杂化膜表现出与Nafion 117相当的质子电导率，而与Nafion 117相比却具有较低的甲醇渗透性。我们推测，掺入的sPOSS笼中的极性磺酸基团会组装成提供离子传导路径，而Nasion 117的疏水部分相同的sPOSS笼子结合在一起形成了对甲醇渗透杂化膜的屏障。

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