Effects of droplet size and solute concentration on drying process of polymer solution droplets deposited on homogeneous surfaces
Effects of droplet size and solute concentration on drying process of polymer solution droplets deposited on homogeneous surfaces
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DOI：
10.1016/j.ijheatmasstransfer.2006.02.049
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发表时间：
2006-09-01
影响因子：
5.2
通讯作者：
Takahara, Atsushi
中科院分区：
文献类型：
--
作者：
Fukai, Jun;Ishizuka, Hirotaka;Takahara, Atsushi
构建了一个实验装置来研究沉积在均匀表面上的微米级聚合物溶液液滴的干燥过程。由于尺寸效应，蒸发过程中的接触角与使用斜板法测量的接触角滞后不一致。接触线被钉扎时的平均聚合物浓度与初始溶液浓度无关。这一事实表明，自由对流在钉扎之前起的作用是微弱的。此外，发现钉扎时间或后退距离是决定聚合物薄膜形状和尺寸的关键因素。 (c) 2006 Elsevier Ltd. 保留所有权利。
An experimental setup is constructed to investigate the drying process of a micro-scale polymer solution droplet deposited on homogeneous surfaces. The contact angle during evaporation does not agree with the contact angle hysteresis measured using an inclined plate method due to the size effect. The average polymer concentration at which the contact line is pinned is independent of the initial solution concentration. This fact reveals that the free convection plays an impotent role before pinning. The pinning time, or the receding distance, is moreover found to be a key factor that dominates the shape and dimensions of the polymer films. (c) 2006 Elsevier Ltd. All rights reserved.