Water Absorption of the Polymer Electrolyte Systems Pb(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n] and Zn(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n]
Water Absorption of the Polymer Electrolyte Systems Pb(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n] and Zn(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n]
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聚合物电解质体系 Pb(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n] 和 Zn(CF[sub 3]SO[sub 3])[sub 2]PEO[sub
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
J. Tegenfeldt
中科院分区：
文献类型：
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作者：
Aasa Lauenstein;A. Johansson;J. Tegenfeldt
研究了聚环氧乙烷(PEO)薄膜和M(Cf[sub3]SO[sub3])[sub2]PEO[subn]薄膜在9~24范围内的吸水行为。对其吸水动力学进行了定量测定。质子核磁共振谱被用来表征吸水对聚合物性质的影响，如结晶度和高分子链的迁移率。我们还对潮湿的样品进行了阻抗谱测量。研究发现，吸水能提高聚合物链的迁移率和电解质的离子电导率，并提出了可能的机理。水的吸收也会导致样品中晶相的数量减少。此外，用氚核磁共振研究了吸附的水的流动性，证明聚合物表面不存在液态水表层，水化时观察到的电导率增加是水化聚合物电解质本身的特性。
The water absorption behavior has been studied for poly(ethylene oxide) films (PEO) and for films of M(CF[sub 3]SO[sub 3])[sub 2]PEO[sub n] with M = Zn and Pb and n in the range of 9 to 24. Quantitative measurements of the kinetics of water absorption have been made. Proton nuclear magnetic resonance (NMR) spectroscopy has been used to characterize the effects of water absorption on the polymer properties, such as degree of crystallinity and polymer chain mobility. Impedance spectroscopy measurements have also been performed on humid samples. Water absorption is found to increase the mobility of the polymer chain as well as the ionic conductivity of the electrolyte, and a possible mechanism for these effects is proposed. Water absorption also causes a decrease of the amount of crystalline phase present in the sample. In addition, deuteron NMR has been used to study the mobility of the absorbed water, demonstrating the absence of liquid water surface layers on the polymer, and that the conductivity increase observed upon hydration is a property of the hydrated polymer electrolyte itself.