Ion Transport in Dynamic Polymer Networks Based on Metal-Ligand Coordination: Effect of Cross-Linker Concentration
Ion Transport in Dynamic Polymer Networks Based on Metal-Ligand Coordination: Effect of Cross-Linker Concentration
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DOI：
10.1021/acs.macromol.7b02141
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发表时间：
2018-02
期刊：
影响因子：
5.5
通讯作者：
Gabriel E. Sanoja;Nicole S. Schauser;J. Bartels;C. M. Evans;M. Helgeson;R. Seshadri;R. Segalman
中科院分区：
文献类型：
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作者：
Gabriel E. Sanoja;Nicole S. Schauser;J. Bartels;C. M. Evans;M. Helgeson;R. Seshadri;R. Segalman
高性能离子导电聚合物的开发需要对离子-聚合物缔合、离子电导率和聚合物力学之间的联系进行全面的多尺度理解。我们提出了基于动态金属配体配位的聚合物网络作为模型系统来说明这种关系。这些材料的分子设计允许对配体和金属的性质和浓度进行精确和独立的控制，这些性质和浓度是体离子传导和聚合物力学的关键分子性质。所研究的模型系统受到聚合离子液体的启发，由具有束缚的咪唑部分的聚环氧乙烷组成，这些部分在掺入双（三氟甲基磺酰基）酰亚胺镍（II）后促进解离。镍-咪唑相互作用物理交联聚合物，增加弹性活性股的数量，并显着提高模量。此外，离子电导率的最大值观察到由于竞争的电子…
The development of high-performance ion conducting polymers requires a comprehensive multiscale understanding of the connection between ion–polymer associations, ionic conductivity, and polymer mechanics. We present polymer networks based on dynamic metal–ligand coordination as model systems to illustrate this relationship. The molecular design of these materials allows for precise and independent control over the nature and concentration of ligand and metal, which are molecular properties critical for bulk ion conduction and polymer mechanics. The model system investigated, inspired by polymerized ionic liquids, is composed of poly(ethylene oxide) with tethered imidazole moieties that facilitate dissociation upon incorporation of nickel(II) bis(trifluoromethylsulfonyl)imide. Nickel–imidazole interactions physically cross-link the polymer, increase the number of elastically active strands, and dramatically enhance the modulus. In addition, a maximum in ionic conductivity is observed due to the competing e...