论文标题
液滴吸收并扩散成薄层聚合物水凝胶
Droplet absorption and spreading into thin layers of polymer hydrogels
论文作者
论文摘要
从生物组织到油漆层，与适当的溶剂接触时具有膨胀能力的宏观非孔材料无处不在。在这里，我们从实验和理论上研究了最简单的系统之一，即单滴稀薄的水凝胶层的肿胀。使用定制的实验设置，我们观察到快速吸收，导致径向扩散的轴对称水泡。我们采用线性孔隙弹性框架和薄层尺度，开发出非线性的一维扩散方程，以使泡沫高度的演变与实验观测非常吻合。
From biological tissues to layers of paint, macroscopic non-porous materials with the capacity to swell when brought in contact with an appropriate solvent are ubiquitous. Here, we study experimentally and theoretically one of the conceptually simplest of such systems, the swelling of a thin hydrogel layer by a single water drop. Using a bespoke experimental setup, we observe fast absorption leading to a radially spreading axisymmetric blister. Employing a linear poroelastic framework and thin-layer scalings, we develop a non-linear one-dimensional diffusion equation for the evolution of the blister height profile, which agrees well with experimental observations.
