Soft Wetting: Droplet Receding Contact Angles on Soft Superhydrophobic Surfaces

doi:10.1021/acs.langmuir.3c02667

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	Soft Wetting: Droplet Receding Contact Angles on Soft Superhydrophobic Surfaces
	Jiang, Youhua; Xu, Zhijia; Li, Bin; Li, Juan; Guan DS(关东石)
通讯作者	Jiang, Youhua(youhua.jiang@gtiit.edu.cn)
发表期刊	LANGMUIR
	2023-10-19
卷号	39 期号:43 页码:15401-15408
ISSN	0743-7463
摘要	Despite intensive investigations on the droplet receding contact angle on superhydrophobic surfaces, i.e., a key parameter characterizing surface wettability and adhesion, the quantitative correlation between the surface structure mechanical properties (softness) and the droplet receding contact angles remains vague. By systematically varying the geometric dimensions and mechanical properties of soft pillar arrays, we find that the droplet receding contact angles decrease with the decrease in the pillar spring constant. Most surprisingly, the densely packed pillar arrays may result in larger receding contact angles than those on sparsely packed pillars, opposing the understanding of rigid pillar arrays, where the receding contact angles increase with a decrease in the packing density of pillars. This is attributed to the collective effects of capillarity and elasticity, where the energy consumed by the sliding contact line, the energy stored in the distorted liquid-vapor interface, and the energy stored in the deflected pillar contribute to the droplet depinning characteristics. We develop an analytical model to predict the droplet receding contact angles on soft superhydrophobic pillar arrays with knowledge of the material intrinsic receding contact angle, the pillar geometry, and the pillar mechanical properties. The predictions are corroborated by the experimental data measured in this and prior studies.
DOI	10.1021/acs.langmuir.3c02667
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:001094333300001
关键词[WOS]	HYSTERESIS ; CASSIE ; ELASTOCAPILLARITY ; TENSION ; WENZEL
WOS研究方向	Chemistry ; Materials Science
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
资助项目	National Natural Science Foundation of China[12202108] ; National Natural Science Foundation of China[11972351] ; Guangdong Basic and Applied Basic Research Foundation[2021A1515110184] ; Guangdong Basic and Applied Basic Research Foundation[2022A1515011214] ; Guangdong Basic and Applied Basic Research Foundation[2021B0301030005] ; Opening fund of State Key Laboratory of Nonlinear Mechanics
项目资助者	National Natural Science Foundation of China ; Guangdong Basic and Applied Basic Research Foundation ; Opening fund of State Key Laboratory of Nonlinear Mechanics
论文分区	二类
力学所作者排名	3+
RpAuthor	Jiang, Youhua
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/93353
专题	非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Jiang, Youhua,Xu, Zhijia,Li, Bin,et al. Soft Wetting: Droplet Receding Contact Angles on Soft Superhydrophobic Surfaces[J]. LANGMUIR,2023,39,43,:15401-15408.
APA	Jiang, Youhua,Xu, Zhijia,Li, Bin,Li, Juan,&关东石.(2023).Soft Wetting: Droplet Receding Contact Angles on Soft Superhydrophobic Surfaces.LANGMUIR,39(43),15401-15408.
MLA	Jiang, Youhua,et al."Soft Wetting: Droplet Receding Contact Angles on Soft Superhydrophobic Surfaces".LANGMUIR 39.43(2023):15401-15408.

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