Anomalous Drying Dynamics of a Polymer Solution on a Substrate
Anomalous Drying Dynamics of a Polymer Solution on a Substrate
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基材上聚合物溶液的异常干燥动力学
DOI：
10.1140/epje/i2013-13063-6
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发表时间：
2013
影响因子：
1.8
通讯作者：
S. Arai and M. Doi
中科院分区：
文献类型：
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作者：
粕谷昌宏;粕谷昌宏;粕谷昌宏;粕谷昌宏;粕谷昌宏;粕谷昌宏;勝野 弘子;勝野 弘子;勝野 弘子;勝野 弘子;S. Arai and M. Doi
摘要 当含有挥发性溶剂的聚合物溶液暴露在空气中时，由于溶剂的蒸发，溶液表面往往会形成一层弹性层（称为表皮）。在形成这样的皮层之后，通常认为通过蒸发而从溶液中进一步萃取溶剂以降低溶液中的压力。我们发现，在置于基材上的 PMMA/丙酮液滴中，随着溶剂进一步蒸发，表层下方的液体被推出。这些现象表明溶液中的压力因溶剂蒸发而增加。它被认为是由皮肤层发生收缩和其他结构变化引起的。图形摘要
AbstractWhen a polymer solution with volatile solvent is exposed to open air, an elastic layer (called a skin) is often formed at the surface of the solution due to evaporation of the solvent. After such a skin is formed, further extraction of the solvent from the solution caused by evaporation has generally been considered to reduce the pressure in the solution. We have found that, in PMMA/acetone droplet placed on a substrate, the liquid below the skin layer is pushed out as the solvent evaporates further. These phenomena indicate that the pressure in the solution increases by solvent evaporation. It is considered to be caused by the shrinkage and other structural changes taking place in the skin layer.Graphical abstract