International Center for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
Department of Applied Chemistry, Faculty of Engineering, Osaka Institute of Technology, 5-16-1 Omiya, Asahi-ku, Osaka, 535-8585, Japan.
Small. 2021 Sep;17(37):e2102438. doi: 10.1002/smll.202102438. Epub 2021 Aug 4.
Liquid marbles are nonsticking droplets wrapped with hydrophobic nano- to micrometer particles and are expected to be useful for various applications, especially in industrial and biomedical fields. However, the practical use of liquid marbles is limited by their fragility. In this study, the dynamics of particle monolayer-stabilized liquid marble breakage upon impacting a solid surface are monitored in situ by high-speed interfacial microscopy. The experiments show that the breakage of liquid marbles can be induced by either i) cracking or ii) water penetration depending on the impact energy. The applicable scenario is determined by whether a jamming transition of the wrapping particles occurs during impact. The breakage mechanisms provide insights on how to improve the robustness of liquid marbles in accordance with these scenarios.
液滴是由纳米到微米级的疏水颗粒包裹而成的非粘性液滴，预计将在各种应用中有用，特别是在工业和生物医学领域。然而，液滴的实际应用受到其易碎性的限制。在这项研究中，通过高速界面显微镜原位监测了颗粒单层稳定的液滴在撞击固体表面时的破裂动力学。实验表明，液滴的破裂可以通过 i）裂纹或 ii）水渗透取决于冲击能量。适用的场景由冲击过程中包裹颗粒是否发生阻塞转变来决定。这些破裂机制为根据这些场景如何提高液滴的鲁棒性提供了深入的了解。
