结构分散性作为以乙烯氧化物为基础的移植聚合物电解质中离子运输的决定因素
Anna Vigolo1, Valeria Vanoli2, Luca Laugeni3
1Laboratory for Macromolecular and Organic Chemistry, Department of Chemical Sciences, University of Padova, Via Marzolo 1, 35131 Padova, Italy.
概括
接种聚合物中的侧链异质性增强了聚合物电解质 (PE) 中的离子运输. 增加侧链分散性改善盐分离和离子导电性,指导未来的PE设计.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
背景情况:
- 带有橄乙烯糖醇 (OEG) 侧链和聚甲烯酸骨架的移植聚合物被研究为聚合物电解质 (PE).
- OEG 分段协调+离子,对于离子导电性至关重要.
- 由于OEG的长度不同,聚[oligo-(乙烯基醇) 甲基乙醇甲基烯酸]-s (P-(OEG) -MAs) 的商业合成导致结构多分散性.
研究的目的:
- 研究侧链异质性对离子运输的影响.
- 将结构多分散的P-(OEG) -MAs与同质的移植聚合物进行比较.
- 确定侧链分散在离子导电性和盐分离中的作用.
主要方法:
- 结构多分散和均的P-(OEG) -MAs的合成.
- 利用闪光色谱来获得对同质聚合物的离散宏观素料.
- 测量了离子导电性,盐分离,热性质,质和聚合物扩散性.
主要成果:
- 离子导电性随着侧链分散度的增加而增加.
- 聚分散P-(OEG) -MAs中增强的侧链异质性导致了更大的盐分离和更高的离子导电性,而盐含量较高.
- 这些趋势独立于热特性,学和聚合物扩散性,这表明离子运输不仅仅是由聚合物动力学决定的.
结论:
- 侧链分散性是基于P-OEG-MA的PE中离子运输的关键决定因素.
- 侧链异质性对离子运输的影响随着骨干灵活性增加而减少 (例如,在聚烯酸盐中).
- 了解侧链异质性和骨干灵活性对于植入PE的合理设计至关重要.
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