Velocity-Switched Droplet Rebound Direction on Anisotropic Superhydrophobic Surfaces

doi:10.1002/smll.202305568

CORC > 力学研究所 > 中国科学院力学研究所 > 非线性力学国家重点实验室

	Velocity-Switched Droplet Rebound Direction on Anisotropic Superhydrophobic Surfaces
	Li PL(李培柳)2,3,5,6; Zhan, Fei 1; Wang, Lei 4,5,6
刊名	SMALL
	2023-09-26
页码	8
关键词	anisotropic superhydrophobic surface bouncing motion droplet transport energy conversion impacting velocity
ISSN号	1613-6810
DOI	10.1002/smll.202305568
通讯作者	Wang, Lei(leiwang@mail.ipc.ac.cn)
英文摘要	Droplet well-controlled directional motion being an essential function has attracted much interest in academic and industrial applications, such as self-cleaning, micro-/nano-electro-mechanical systems, drug delivery, and heat-transferring. Conventional understanding has it that a droplet impacted on an anisotropic surface tends to bounce along the microstructural direction, which is mainly dictated by surface properties rather than initial conditions. In contrast to previous findings, it demonstrates that the direction of a droplet's rebound on an anisotropic surface can be switched by designing the initial impacting velocity. With an increase in impacting height from 2 to 10 cm, the droplet successively shows a backward, vertical, and forward motion on anisotropic surfaces. Theoretical demonstrations establish that the transition of droplet bouncing on the anisotropic surface is related to its dynamic wettability during impacting process. Characterized by the liquid-solid interaction, it is demonstrated that the contact state at small and large impacting heights induces an opposite resultant force in microstructures. Furthermore, energy balance analysis reveals that the energy conversion efficiency of backward motion is almost three times as that of traditional bouncing. This work, including experiments, theoretical models, and energy balance analysis provides insight view in droplet motions on the anisotropic surfaces and opens a new way for the droplet transport. This study demonstrates that the direction of a droplet's rebound on an anisotropic surface can be switched by designing the initial impacting velocity. The droplet successively shows a backward, vertical, and forward motion on anisotropic surfaces with an increase in impacting height from 2 to 10 cm.image
分类号	一类
资助项目	This work was supported by the National Natural Science Foundation of China (no. 21805294).[21805294] ; National Natural Science Foundation of China
WOS关键词	TRANSPORT
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
WOS记录号	WOS:001070775200001
资助机构	This work was supported by the National Natural Science Foundation of China (no. 21805294). ; National Natural Science Foundation of China
其他责任者	Wang, Lei
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/92981]
专题	力学研究所_非线性力学国家重点实验室
作者单位	1.Shijiazhuang Tiedao Univ, Sch Elect & Elect Engn, Shijiazhuang 050043, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Beijing Inst Technol, Sch Aerosp Engn, Dept Mech, Biomech & Biomat Lab, Beijing 100081, Peoples R China; 4.Beijing Forestry Univ, Beijing Key Lab Lignocellulos Chem, Beijing 100083, Peoples R China; 5.Chinese Acad Sci, Tech Inst Phys & Chem, Key Lab Cryogen, Beijing 100190, Peoples R China; 6.Chinese Acad Sci, Tech Inst Phys & Chem, Beijing Key Lab Cryo Biomed Engn, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Li PL,Zhan, Fei,Wang, Lei. Velocity-Switched Droplet Rebound Direction on Anisotropic Superhydrophobic Surfaces[J]. SMALL,2023:8.
APA	李培柳,Zhan, Fei,&Wang, Lei.(2023).Velocity-Switched Droplet Rebound Direction on Anisotropic Superhydrophobic Surfaces.SMALL,8.
MLA	李培柳,et al."Velocity-Switched Droplet Rebound Direction on Anisotropic Superhydrophobic Surfaces".SMALL (2023):8.