高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (3): 610.doi: 10.7503/cjcu20120739

• 物理化学 • 上一篇    下一篇

图案化基底上液滴的挥发行为

李秀玲, 胡滨, 高路   

  1. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012
  • 收稿日期:2012-09-17 出版日期:2013-03-10 发布日期:2013-02-18
  • 通讯作者: 高路,女,博士,讲师,主要从事无机功能材料方面的研究.E-mail:gaolu@jlu.edu.cn;李秀玲,博士,现工作于吉林财经大学应用数学学院. E-mail:gaolu@jlu.edu.cn*李秀玲,博士,现工作于吉林财经大学应用数学学院.

Investigation of Evaporation of Droplet on Patterned Substrate

LI Xiu-Ling, HU Bin, GAO Lu   

  1. State Key Laboratory of Inorganic Synthesis & Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2012-09-17 Online:2013-03-10 Published:2013-02-18

PDF (PC)

被引次数

8

摘要：

采用液滴形状分析仪, 在线跟踪了液滴在图案化基底上的挥发过程. 结果表明, 与平滑基底结果相比, 图案化基底上的挥发过程明显不同. 首先, 接触角减小; 另外, 由于发生了Cassie态到Wenzel态转变, 所得接触直径在减小过程中产生了一个突然变大的阶段. 在该挥发过程中, 突起部分的面积分数扮演了十分重要的角色.

关键词: 液滴挥发, 图案化基底, Wenzel态, Cassie态

Abstract:

Using drop shape analysis, evaporation of water droplet on patterned substrate were investigated. The results show that evolutions of contact angle and contact diameter depend crucially on the solid fraction in contact with the liquid. With decreasing this fraction, static contact angle of this system increased linearly while a jump in the contact diameter, which was caused by the transition from Cassie state to Wenzel state, appeared and became more and more remarkably. The results will not only help to understand the basic physical mechanism of evaporation, but also serve as important starting point of considering Cassie, Wenzel state and transition between them.

Key words: Evaporation, Patterned substrate, Wenzel state, Cassie state

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