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Superhydrophobic-like tunable droplet bouncing on slippery liquid interfaces.


ABSTRACT: Droplet impacting on solid or liquid interfaces is a ubiquitous phenomenon in nature. Although complete rebound of droplets is widely observed on superhydrophobic surfaces, the bouncing of droplets on liquid is usually vulnerable due to easy collapse of entrapped air pocket underneath the impinging droplet. Here, we report a superhydrophobic-like bouncing regime on thin liquid film, characterized by the contact time, the spreading dynamics, and the restitution coefficient independent of underlying liquid film. Through experimental exploration and theoretical analysis, we demonstrate that the manifestation of such a superhydrophobic-like bouncing necessitates an intricate interplay between the Weber number, the thickness and viscosity of liquid film. Such insights allow us to tune the droplet behaviours in a well-controlled fashion. We anticipate that the combination of superhydrophobic-like bouncing with inherent advantages of emerging slippery liquid interfaces will find a wide range of applications.

SUBMITTER: Hao C 

PROVIDER: S-EPMC4918357 | biostudies-literature | 2015 Aug

REPOSITORIES: biostudies-literature

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Superhydrophobic-like tunable droplet bouncing on slippery liquid interfaces.

Hao Chonglei C   Li Jing J   Liu Yuan Y   Zhou Xiaofeng X   Liu Yahua Y   Liu Rong R   Che Lufeng L   Zhou Wenzhong W   Sun Dong D   Li Lawrence L   Xu Lei L   Wang Zuankai Z  

Nature communications 20150807


Droplet impacting on solid or liquid interfaces is a ubiquitous phenomenon in nature. Although complete rebound of droplets is widely observed on superhydrophobic surfaces, the bouncing of droplets on liquid is usually vulnerable due to easy collapse of entrapped air pocket underneath the impinging droplet. Here, we report a superhydrophobic-like bouncing regime on thin liquid film, characterized by the contact time, the spreading dynamics, and the restitution coefficient independent of underlyi  ...[more]

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