Mechanisms of Morphology Development and Water Motion in Proton Exchange Membranes
Mechanisms of Morphology Development and Water Motion in Proton Exchange Membranes
复制标题
质子交换膜的形态发展和水运动机制
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
M. Hickner
中科院分区：
文献类型：
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作者：
M. Hickner
讨论了质子交换膜设计中的两个关键参数：纳米相形态和水的运动。虽然通过研究聚（全氟磺酸）和磺化芳族聚合物已经了解了很多关于质子交换膜的功能，但正在开发用于水性应用的新一代电解质，其推动了吸水聚合物中离子电导率和小分子传输速率的极限。已证明采用嵌段共聚物的效用集中并影响离子域的长程连接性，但离子如何在这些系统中排列的细节仍有待探索。本文将综述嵌段共聚物质子交换膜的实例及其在理解膜功能方面的应用。此外，PEM中的水运动对于实现足够的质子传导性至关重要。水的运动和导电性之间的关系可以用来设计新的材料与洞察系统中的水-聚合物相互作用。
Two critical parameters of nanophase morphology and water motion are discussed in the design of proton exchange membranes (PEMs). While much has been learned about the function of proton exchange membranes by studying poly(perfluorosulfonic acid) and sulfonated aromatic polymers, new generations of electrolytes for aqueous applications are being developed that push the limits of ion conductivity and small molecule transport rates in water-absorbing polymers. The utility of employing block copolymers has been demonstrated to concentrate and affect long-range connectivity of ionic domains, but the details of how ions arrange in these systems are still to be explored. Examples of block copolymer proton exchange membranes and their usefulness in understanding membrane function will be reviewed. Additionally, water motion in PEMs is critical to achieving sufficient proton conductivity. The relationship between water motion and conductivity can be used to design new materials with insight of the water-polymer interactions in the system.