Origin of contact line forces during the retraction of dilute polymer solution drops.
Origin of contact line forces during the retraction of dilute polymer solution drops.
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DOI：
10.1021/la5005159
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发表时间：
2014-05
期刊：
影响因子：
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通讯作者：
M. I. Smith;J. S. Sharp
中科院分区：
文献类型：
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作者：
M. I. Smith;J. S. Sharp
研究了注射器驱动流中水和稀释聚环氧乙烷溶液 (PEO) 滴的强制去湿。与跌落冲击期间观察到的自由去湿进行比较。我们提供了强有力的证据表明，在液滴回缩过程中，沉积在基材上的聚合物会在接触线上产生与速度相关的力。这些发现与之前的研究形成鲜明对比，之前的研究将耗散归因于接触线处的体粘弹性效应或正应力效应。
The forced dewetting of water and dilute poly(ethylene oxide) solution (PEO) drops is investigated for syringe-driven flow. Comparisons are made with the free dewetting observed during drop impact. We provide strong evidence that during droplet retraction, polymer deposited on the substrate results in a velocity-dependent force at the contact line. These findings are in stark contrast to previous studies which attributed dissipation to bulk viscoelastic effects or normal stress effects at the contact line.