Characterization of super liquid-repellent surfaces

Butt, Hans-Jürgen, Roisman, Ilia, Brinkmann, Martin, Papadopoulos, Periklis, Vollmer, Doris and Semprebon, Ciro (2014) Characterization of super liquid-repellent surfaces. Current Opinion in Colloid & Interface Science, 19 (4). pp. 343-354. ISSN 1359-0294

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Abstract

Characterization of the wetting properties is a prerequisite for a fundamental understanding and the targeted development of superhydrophobic and superamphiphobic layers. To fabricate super liquid-repellent layers, two requirements need to be met: The surfaces have to be of low energy and their nano- and microstructure needs to be designed in a way that leads to the entrapment of air. The challenge is to design and produce suitable nano- and microstructures to control wetting. Here we describe important methods to quantify wetting properties of super liquid-repellent layers. These properties include the apparent advancing and receding contact angles, the roll-off angle, tensile and lateral adhesion, the impalement pressure, and the observation of drop impact. The most important one is the apparent receding contact angle because it also limits lateral adhesion. The link of these properties to the nano- and microscopic structure of the layer is discussed. Limits, problems, and future challenges are pointed out.

Item Type:	Article
Uncontrolled Keywords:	Nanostructure, Superhydrophobicity, Superoleophobicity, Superomniphobicity
Subjects:	F200 Materials Science
Department:	Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User:	Becky Skoyles
Date Deposited:	21 May 2018 11:30
Last Modified:	11 Oct 2019 20:15
URI:	http://nrl.northumbria.ac.uk/id/eprint/34292

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