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Dynamically Actuated Liquid-Infused Poroelastic Film with Precise Control over Droplet Dynamics

机译：精确控制液滴动力学的动态液体注入多孔弹性膜

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摘要

Traditional dynamic adaptive materials rely on an atomic/molecular mechanism of phase transition to induce macroscopic switch of properties, but only a small number of these materials and a limited responsive repertoire are available. Here, liquid as the adaptive component is utilized to realize responsive functions. Paired with a porous matrix that can be put in motion by an actuated dielectric elastomer film, the uncontrolled global flow of liquid is broken down to well-defined reconfigurable localized flow within the pores and conforms to the network deformation. A detailed theoretical and experimental study of such a dynamically actuated liquid-infused poroelastic film is discussed. This system demonstrates its ability to generate tunable surface wettability that can precisely control droplet dynamics from complete pinning, to fast sliding, and even more complex motions such as droplet oscillation, jetting, and mixing. This system also allows for repeated and seamless switch among these different droplet manipulations. These are desired properties in many applications such as reflective display, lab-on-a-chip, optical device, dynamic measurements, energy harvesting, and others.
机译：传统的动态自适应材料依赖于相变的原子/分子机制来诱发性能的宏观转换，但是仅这些材料中的一小部分和有限的响应库是可用的。在此，利用液体作为自适应成分来实现响应功能。与可通过致动的介电弹性体薄膜移动的多孔基质配对，不受控制的整体液体流被分解为孔内定义明确的可重构局部流，并符合网络变形。讨论了这种动态驱动的液体注入多孔弹性薄膜的详细理论和实验研究。该系统展示了产生可调表面润湿性的能力，该表面润湿性可以精确地控制液滴动力学，从完全钉扎到快速滑动，甚至是更复杂的运动，例如液滴振荡，喷射和混合。该系统还允许在这些不同的液滴操作之间重复和无缝切换。这些是许多应用程序中所需的属性，例如反射显示器，芯片实验室，光学设备，动态测量，能量收集等。

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