Phase Separation in Wetting Ridges of Sliding Drops on Soft and Swollen Surfaces
Phase Separation in Wetting Ridges of Sliding Drops on Soft and Swollen Surfaces
复制标题
柔软和膨胀表面上滑动液滴润湿脊的相分离
DOI：
10.1103/physrevlett.130.058205
复制
发表时间：
2023
影响因子：
8.6
通讯作者：
Pham, Jonathan T.
中科院分区：
文献类型：
--
作者：
Hauer, Lukas;Cai, Zhuoyun;Skabeev, Artem;Vollmer, Doris;Pham, Jonathan T.
与溶胀的弹性体基底接触的液滴可在润湿脊中诱导毛细管介导的相分离。使用共聚焦显微镜，我们可视化的低聚硅油从交联的硅网络在稳态滑动的水滴的相分离。我们发现油尖高度和下降滑动速度之间的反比关系，这是合理的竞争运输时间尺度的油分子：分离率与下降平流速度。在高度溶胀的网络中的分离速率与纯熔体中的扩散一样快。
Drops in contact with swollen, elastomeric substrates can induce a capillary mediated phase separation in wetting ridges. Using confocal microscopy, we visualize phase separation of oligomeric silicone oil from a cross-linked silicone network during steady-state sliding of water drops. We find an inverse relationship between the oil tip height and the drop sliding speed, which is rationalized by competing transport timescales of the oil molecules: separation rate versus drop-advection speed. Separation rates in highly swollen networks are as fast as diffusion in pure melts.