在水面上的阴性液滴的循环溶液作用,使微型化成为可能
Vinod Babasaheb Vanarse1, Siddharth Thakur1, Dipankar Bandyopadhyay1,2,3
1Department of Chemical Engineering, Indian Institute of Technology, Guwahati 781039, Assam, India.
Langmuir : the ACS journal of surfaces and colloids
|January 9, 2025
概括
液晶滴中的自我组织的接触线不稳定性会产生微小的滴. 这种由溶剂扩散和蒸发驱动的现象导致滴滴运动和受控的碎片化.
科学领域:
- 软物质物理学 软物质物理学
- 流体动力学 流体动力学
- 材料科学 材料科学 材料科学
背景情况:
- 宏观液晶 (LC) 液滴表现出自我组织的接触线不稳定性 (CLI).
- 这些不稳定性可以被利用来产生大量的微型LC滴.
- 以前的研究还没有完全阐明驱动滴滴运动和碎片化的机制.
研究的目的:
- 为了研究液晶 (LC) 滴的自组织接触线不稳定性 (CLI).
- 了解滴滴运动和碎片化成更小的滴滴的基本机制.
- 探索溶剂扩散,蒸发和流体动力学在这个过程中的作用.
主要方法:
- 在不溶剂表面 (水) 上,在液晶 (LC) 滴滴附近分配一种挥发性溶剂 (hexane).
- 使用显微镜观察滴水的行为,包括旋形成,运动和碎片化.
- 分析压力梯度,扩散速率和像雷利高原不稳定性 (RPI) 这样的不稳定现象.
主要成果:
- 在滴滴中观察到双旋形式的独特的自我组织的运动.
- 由于溶剂蒸发过程中的拉普拉斯压力变化,流量逆转发生.
- 周期性振荡CLI导致了类似手指的结构,这些结构通过RPI通过小型化卫星滴破裂.
结论:
- 自组织的 CLI 提供了一个巧妙的途径,用于生成小型化的 LC 滴.
- 液晶弹性稳定了手指,影响了卫星滴滴间距.
- 控制实验确定了毛细血管,阻力,溶性马兰戈尼和透力,这些力量有助于滴滴运动.
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