在密集的合体中剪切诱导的结构排序的动力学
HongRui He1,2, Jonghun Lee3, Zhang Jiang3
1Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Argonne, Illinois 60439, United States.
The journal of physical chemistry. B
|August 10, 2023
概括
体溶液在振荡式剪切下表现出压力控制的排序和扰乱过渡,导致独特的剪切加厚行为. 在这个过程中,系统在元稳定状态之间动态振荡.
科学领域:
- 体科学是一门学科.
- 材料科学是一种材料科学.
- 类风病学 类风病学 类风病学
背景情况:
- 环状溶液的宏观质性质与微观结构变化有关.
- 了解这些结构-属性关系对于材料设计至关重要.
研究的目的:
- 在合溶液中研究微观结构和宏观风学之间的关系.
- 探索由振荡式剪切引发的顺序到失序的转换.
- 阐明在不同应变幅度下结构变化的动力学和动态.
主要方法:
- 在现场利用Rheo-小角度X射线散射 (Rheo-SAXS) 进行高时间分辨率的结构分析.
- 应用了振荡式剪切来诱导受控的结构转换.
- 分析了依赖时间的动力学和动态平衡路径.
主要成果:
- 在合溶液中表现出一种压力控制的从排序到失序的过渡.
- 确定了一种新的剪切加厚机制,它与水力动力或摩擦效应不同.
- 揭示了对结构秩序的复杂,非单调的动力学,特别是在临界应变值附近.
- 在单个周期内观察到两个动态元稳定状态之间的振荡.
结论:
- 宏观的风湿学与体系统中的微观结构动态直接相关.
- 振荡式剪切通过应变控制过渡诱导独特的剪切加厚行为.
- 在剪切下的结构进化过程中,体系统表现出复杂的动力学和转移稳定的状态.
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