Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/104992
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Type: Journal article
Title: Facile adhesion-tuning of superhydrophobic surfaces between “lotus” and “petal” effect and their influence on icing and deicing properties
Author: Nine, M.
Tung, T.
Alotaibi, F.
Tran, D.
Losic, D.
Citation: ACS Applied Materials and Interfaces, 2017; 9(9):8393-8402
Publisher: American Chemical Society
Issue Date: 2017
ISSN: 1944-8244
1944-8252
Statement of
Responsibility: 
Md J. Nine, Tran Thanh Tung, Faisal Alotaibi, Diana N. H. Tran and Dusan Losic
Abstract: Adhesion behavior of superhydrophobic (SH) surfaces is an active research field related to various engineering applications in controlled microdroplet transportation, self-cleaning, deicing, biochemical separation, tissue engineering, and water harvesting. Herein, we report a facile approach to control droplet adhesion, bouncing and rolling on properties of SH surfaces by tuning their air-gap and roughness-height by altering the concentrations of poly dimethyl-siloxane (PDMS). The optimal use of PDMS (4-16 wt %) in a dual-scale (nano- and microparticles) composite enables control of the specific surface area (SSA), pore volume, and roughness of matrices that result in a well-controlled adhesion between water droplets and SH surfaces. The sliding angles of these surfaces were tuned to be varied between 2 ± 1 and 87 ± 2°, which are attributed to the transformation of the contact type between droplet and surface from "point contact" to "area contact". We further explored the effectiveness of these low and high adhesive SH surfaces in icing and deicing actions, which provides a new insight into design highly efficient and low-cost ice-release surface for cold temperature applications. Low adhesion (lotus effect) surface with higher pore-volume exhibited relatively excellent ice-release properties with significant icing delay ability principally attributed to the large air gap in the coating matrix than SH matrix with high adhesion (petal effect).
Keywords: deicing; lotus effect; petal effect; porosity; roughness; superhydrophobicity
Rights: Copyright © 2017 American Chemical Society
RMID: 0030066269
DOI: 10.1021/acsami.6b16444
Grant ID: http://purl.org/au-research/grants/arc/IH150100003
Appears in Collections:Chemical Engineering publications

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