Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.



Temperature-regulated adhesion of impacting drops on nano/microtextured monostable superrepellent surfaces

Author affiliations

Abstract

The monostable Cassie state is a favorable wetting state for superhydrophobic materials, in which water drops can automatically transfer from the Wenzel wetting state to the Cassie wetting state, such that as a consequence the water repellency can be maintained. Drop impact phenomena are ubiquitous in nature and of critical importance in industry, and previous works show that the efficiency of self-cleaning and dropwise condensation could benefit from drop impact on monostable surfaces. However, whether such a feature is sufficiently robust remains unclear when the temperature of the surface is taken into consideration. Here, we report that there exists a lower bound of the temperature of the surface, under which a transition from the Cassie wetting state to the Wenzel wetting state arises. By varying the temperature of the surface, it is found that the solid–liquid wetting region could be regulated. Based on thermodynamics, we propose a model to predict the controllable wetting region, and we show that the gradual transition of the wetting state is a result of the accumulation of droplets on the nanoscale. Connections between the dynamics occurring at the solid–liquid interfaces on the microscale and the condensation occurring in the nanotextures are constructed. These results deepen our understanding of the breakdown of superhydrophobicity under dynamic impinging in high humidity. Moreover, this study will shed new light on the applications for controllable liquid deposition and surface decoration, such as catalysts on the superhydrophobic surfaces.

Graphical abstract: Temperature-regulated adhesion of impacting drops on nano/microtextured monostable superrepellent surfaces

Back to tab navigation

Supplementary files

Article information


Submitted
18 Mar 2020
Accepted
12 May 2020
First published
13 May 2020

Soft Matter, 2020, Advance Article
Article type
Paper

Temperature-regulated adhesion of impacting drops on nano/microtextured monostable superrepellent surfaces

S. Shi, C. Lv and Q. Zheng, Soft Matter, 2020, Advance Article , DOI: 10.1039/D0SM00469C

Social activity

Search articles by author

Spotlight

Advertisements