Effects of droplet size and solute concentration on drying process of polymer solution droplets deposited on homogeneous surfaces

被引：76
作者：
Fukai, Jun [1 ]
Ishizuka, Hirotaka
Sakai, Yosuke
Kaneda, Masayuki
Morita, Masamichi
Takahara, Atsushi
机构：
[1] Kyushu Univ, Grad Sch Engn, Dept Chem Engn, Fukuoka 8190395, Japan
[2] Kyushu Univ, Grad Sch Engn, Dept Chem & Biochem, Fukuoka 8128581, Japan
[3] Kyushu Univ, Inst Mat Chem & Engn, Fukuoka 8128581, Japan
来源：
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER | 2006年 / 49卷 / 19-20期
基金：
日本学术振兴会;
关键词：
droplet; evaporation; drying; polymer solution; contact angle; inkjet printing;
D O I：
10.1016/j.ijheatmasstransfer.2006.02.049
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
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.
引用
收藏
页码：3561 / 3567
页数：7
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