了解离子液体与半甲基或基链混合物的液体结构
Naomi S Elstone1, Karina Shimizu2, Emily V Shaw1
1Department of Chemistry, University of York, Heslington, York YO10 5DD, U.K.
The journal of physical chemistry. B
|August 9, 2023
概括
混合离子液体 (ILs) 允许对其结构和特性进行微调. 这项研究揭示了混合 perfluorinated 和 alkylated ILs 如何影响纳米结构,影响粘度等特性,并揭示了构成依赖的结构变化.
科学领域:
- 材料科学 材料科学 材料科学
- 物理化学 物理化学
- 超分子化学 超分子化学
背景情况:
- 离子液体 (ILs) 通过结构修改提供可调节的特性.
- 混合不同的ILs提供了一种多功能途径,可以设计批量和接口特征.
- perfluorinated 和 alkylated ILs 具有明显的链灵活性和极化性,提供各种混合可能性.
研究的目的:
- 研究IL混合物的组成,纳米结构和物理性质之间的关系.
- 探索混合化和化ILs对其散装结构的影响.
- 扩大适用于特定应用的可调节IL混合物的库.
主要方法:
- 制备IL混合物:1-甲基-3-八利米达二氧化 ([C8MIM][Tf2N]) 和1-- 1H,1H,2H,2H- perfluorooctyl) -3-甲基二氧化 ([C8MIM-F13][Tf2N]) 的混合物.
- 使用小角度X射线散射 (SAXS) 和小角度中子散射 (SANS) 的结构分析.
- 补充技术包括原子分子动力学模拟,密度和粘度测量.
主要成果:
- 观察到IL混合物纳米结构的组成依赖的变化.
- 非极地区域的长度尺度 (极地非极地峰) 随着[C8MIM-F13][Tf2N]的比例增加.
- 令人惊的是,随着[C8MIM-F13][Tf2N]内容的增加,充电订制峰值的长度尺度下降了.
结论:
- 混合ILs提供了一个简单的方法来调整它们的纳米结构和物理性质.
- 观察到的结构变化与链性质,组成和分子间相互作用之间的相互作用有关.
- 这项工作为设计具有定制性质的新型IL混合物提供了洞察力.
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