Distinguishing deformation mechanisms in elastocapillary experiments
Distinguishing deformation mechanisms in elastocapillary experiments
复制标题
区分弹性毛细管实验中的变形机制
DOI：
10.1039/c9sm01756a
复制
发表时间：
2019
期刊：
影响因子：
3.4
通讯作者：
Daniels, Karen E.
中科院分区：
文献类型：
--
作者：
Chen, Shih-Yuan;Bardall, Aaron;Shearer, Michael;Daniels, Karen E.
众所周知，软质材料会由于各种机制而变形，包括毛细作用、浮力和膨胀。在本文中，我们进行了聚乙烯硅氧烷凝胶线在三种不同溶解度、润湿性和溶胀性的液体中部分浸没的实验。我们的研究结果表明，由于毛细作用、浮力和膨胀引起的变形可能与这些线程达到静态平衡的程度相似。为了解释在单一系统中存在的所有三种效应，我们推导了一个能够解释观察到的数据的模型，并用它来确定三相接触线处的力律。结果表明，测得的力与预期的young - dupryor方程一致，并且不需要包含切向接触线力。
Soft materials are known to deform due to a variety of mechanisms, including capillarity, buoyancy, and swelling. In this paper, we present experiments on polyvinylsiloxane gel threads partially-immersed in three liquids with different solubility, wettability, and swellability. Our results demonstrate that deformations due to capillarity, buoyancy, and swelling can be of similar magnitude as such threads come to static equilibrium. To account for all three effects being present in a single system, we derive a model capable of explaining the observed data and use it to determine the force law at the three-phase contact line. The results show that the measured forces are consistent with the expected Young–Dupré equation, and do not require the inclusion of a tangential contact line force.