Drop impact on elastic superhydrophobic films: From pancake bouncing to saucer bouncing

被引：11

作者：

Huang, Liu ^{[1
]}

Pan, Weihao ^{[1
]}

Chen, Yang ^{[1
]}

Ming, Pingmei ^{[2
]}

Song, Jinlong ^{[1
]}

Wang, Xuyue ^{[1
]}

Hua, Shungang ^{[1
]}

机构：

[1] Dalian Univ Technol, Minist Educ, Key Lab Precis & Nontradit Machining Technol, Dalian 116024, Peoples R China

[2] Henan Polytech Univ, Sch Mech & Power Engn, Jiaozuo 454000, Henan, Peoples R China

来源：

MATERIALS LETTERS | 2021年 / 285卷

基金：

中国国家自然科学基金;

关键词：

Elastic properties; Superhydrophobic; Thin films; Contact time; Pancake bouncing; Saucer bouncing; CONTACT TIME; SURFACE;

D O I：

10.1016/j.matlet.2020.129076

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Realizing a short contact between water drops and surfaces has become a research focus owing to its promising application prospect in anti-icing. Here, we developed an elastic superhydrophobic film with a water contact angle of 166.6 degrees +/- 1.6 degrees and roll-off angle of 2.0 degrees +/- 0.8 degrees to largely reduce the contact time of an impinging drop. The thin films with different strains and after different cycles with a 50% strain could still maintain its low-adhesion superhydrophobicity, demonstrating its excellent adaptability and durability to deal with deformation. It was also found that there was a step-like reduction of the contact time with Weber number We, showing the pancake and saucer bouncing at intermediate and high We, respectively. In comparison with the conventional symmetric bouncing (at low We), the higher elasticity of the film caused by the drop impact contributed to the large contact time reduction for the pancake and saucer bouncing phenomenon. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：4

共 11 条

[1] Reducing the contact time of a bouncing drop (vol 503, pg 385, 2013) [J].