A new model for the formation of contact angle and contact angle hysteresis

doi:10.1088/1674-1056/19/10/106801

中国物理B ›› 2010, Vol. 19 ›› Issue (10): 106801-106801.doi: 10.1088/1674-1056/19/10/106801

A new model for the formation of contact angle and contact angle hysteresis

公茂刚, 刘远越, 许小亮

Department of Physics, University of Science and Technology of China, Hefei 230026, China

收稿日期:2010-03-20 修回日期:2010-04-26 出版日期:2010-10-15 发布日期:2010-10-15
基金资助:
Project supported by the National Basic Research Program of China (Grant No. 2006CB302900) and the National Natural Science Foundation of China (Grant No. 50872129).

A new model for the formation of contact angle and contact angle hysteresis

Gong Mao-Gang(公茂刚), Liu Yuan-Yue(刘远越), and Xu Xiao-Liang(许小亮)^†

Department of Physics, University of Science and Technology of China, Hefei 230026, China

Received:2010-03-20 Revised:2010-04-26 Online:2010-10-15 Published:2010-10-15
Supported by:
Project supported by the National Basic Research Program of China (Grant No. 2006CB302900) and the National Natural Science Foundation of China (Grant No. 50872129).

摘要/Abstract

摘要： The formation mechanism of the contact angle and the sliding angle for a liquid drop on a solid surface plays an important role in producing hydrophobic surfaces. A new half soakage model is established in this paper as a substitute for Wenzel (complete soakage) and Cassie (no soakage) models. The model is suited to many solid surfaces, whether they are hydrophilic or hydrophobic, or even superhydrophobic. Based on the half soakage model, we analyse two surfaces resembling lotus, i.e. taper-like surface and corona-like surface. Furthermore, this new model is used to establish a quantitative relationship between the sliding angle and the parameters of surface morphology.

Abstract: The formation mechanism of the contact angle and the sliding angle for a liquid drop on a solid surface plays an important role in producing hydrophobic surfaces. A new half soakage model is established in this paper as a substitute for Wenzel (complete soakage) and Cassie (no soakage) models. The model is suited to many solid surfaces, whether they are hydrophilic or hydrophobic, or even superhydrophobic. Based on the half soakage model, we analyse two surfaces resembling lotus, i.e. taper-like surface and corona-like surface. Furthermore, this new model is used to establish a quantitative relationship between the sliding angle and the parameters of surface morphology.

Key words: contact angle, half soakage model, contact angle hysteresis

中图分类号: (Surface tension and related phenomena)

68.03.Cd

68.08.-p (Liquid-solid interfaces) 68.35.B- (Structure of clean surfaces (and surface reconstruction))

公茂刚, 刘远越, 许小亮. A new model for the formation of contact angle and contact angle hysteresis[J]. 中国物理B, 2010, 19(10): 106801-106801.

Gong Mao-Gang(公茂刚), Liu Yuan-Yue(刘远越), and Xu Xiao-Liang(许小亮). A new model for the formation of contact angle and contact angle hysteresis[J]. Chin. Phys. B, 2010, 19(10): 106801-106801.

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A new model for the formation of contact angle and contact angle hysteresis

A new model for the formation of contact angle and contact angle hysteresis

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