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首页> 外文期刊>ACS applied materials & interfaces >Swelling-Induced Delamination Causes Folding of Surface-Tethered Polymer Gels
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Swelling-Induced Delamination Causes Folding of Surface-Tethered Polymer Gels

机译：溶胀诱导分层导致表面束缚的聚合物凝胶折叠

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摘要

When a polymer film that is weakly attached to a rigid substrate is exposed to solvent, swelling-induced compressive stress nucleates buckle delamination of the film from the substrate. Surprisingly, the buckles do not have a sinusoidal profile, instead, the film near the delamination buckles slides toward the buckles causing growth of sharp folds of high aspect ratio. These folds do not result from a wrinkle-to-fold transition; instead, the film goes directly from a flat state to a folded state. The folds persist even after the solvent evaporates. We propose that patterned delamination and folding may be exploited torealize high-aspect ratio topological features on surfaces through control of a set of boundary constraints arising from the interrelation of film-surface adhesion, film thickness and degree of swellabilty.
机译：当将薄弱地附着到刚性基材上的聚合物膜暴露在溶剂中时，溶胀诱导的压应力形核使膜从基材上剥离。令人惊讶的是，带扣不具有正弦轮廓，相反，分层带扣附近的薄膜朝带扣滑动，从而导致高纵横比的锐利褶皱增长。这些褶皱不是由皱纹过渡到褶皱造成的;取而代之的是，薄膜直接从平坦状态变为折叠状态。即使在溶剂蒸发后，褶皱仍然存在。我们建议可以通过控制一组边界约束来利用图案化的分层和折叠来实现表面上的高纵横比拓扑特征，该边界约束是由膜表面粘附，膜厚度和可溶度之间的相互关系引起的。

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