在缩的电解质中,相关性诱导的粘性消散
1Laboratoire de Physique de l'École Normale Supérieure, ENS, Université PSL, CNRS, Sorbonne Université, Université Paris-Diderot, Sorbonne Paris Cité, Paris, France and Institute of Science and Technology Austria, 3400 Klosterneuburg, Austria.
The Journal of chemical physics
|February 13, 2024
概括
我们发现离子-水结构和电解质粘度之间存在普遍联系. 这个模型准确地预测了缩盐溶液中的粘度变化,改善了我们对纳米级动态的理解.
科学领域:
- 物理化学 物理化学
- 解决方案化学 解决方案化学
- 计算化学的计算化学
背景情况:
- 溶解离子之间的静电相关性显著影响传输特性,如导电性和离子选择性.
- 这些离子相关性对溶剂特性,特别是粘度的影响尚不清楚,目前的模型无法与实验数据相匹配.
研究的目的:
- 开发一个模型,准确预测缩电解质溶液中的粘度变化.
- 建立电解质溶液的微观结构与其宏观粘度之间的定量联系.
主要方法:
- 利用随机密度函数理论 (SDFT) 准确捕捉电解质中的电荷波动和相关性.
- 衍生出一种简单的分析表达式,用于缩电解质中的粘度校正.
主要成果:
- 由此衍生的分析表达式在所有温度和盐度到和度的实验粘度数据上进行了定量预测.
- 建立了连接液体结构因子与粘度校正的通用关系.
结论:
- 这项研究通过将其直接与微观结构联系起来,为了解电解质粘度提供了突破性进展.
- 这项工作为水和离子在高度缩和相关的溶液中的纳米级动态提供了新的见解.
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