在产生带电的合体悬浮液的过程中,将微观动力学和风学联系起来
Hongrui He1,2, Heyi Liang1,2, Miaoqi Chu3
1Materials Science Division and Center for Molecular Engineering, Argonne National Laboratory, Lemont, IL 60439.
概括
了解软材料的产量是关键. 这项研究揭示了合体悬浮中的粒子间力如何决定屈服行为,从均的流量到复杂的剪切带,影响材料设计.
科学领域:
- 软物质物理学 软物质物理学
- 材料科学 材料科学 材料科学
- 体科学 体科学 体科学
背景情况:
- 对软材料产量的微观洞察力有限.
- 产量在自然和工业过程中至关重要.
研究的目的:
- 为了研究粒子间相互作用如何影响带电的合体悬浮物的产量.
- 将微观粒子动力学与宏观的质行为联系起来.
主要方法:
- 结合在现场的风湿学,X射线散射 (SAXS) 和X射线光子相关谱学 (XPCS).
- 使用了快速滑动力学模拟.
- 通过盐度调整粒子间的吸引力.
主要成果:
- 排斥性悬挂表现出均的屈服,具有安德拉德式的爬行和最小的结构变化.
- 具有吸引力的悬浮表现出复杂的屈服现象:剪切带,延迟屈服和重新固化.
- 在剪带接口上观察到的短暂动态控制了有吸引力的系统行为.
结论:
- 粒子间相互作用潜能直接控制着体悬浮液的质行为.
- 展示了一个设计具有可调节性质的软材料的框架.
- 这些发现对涂料,食品和药物输送的应用有影响.
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