期刊
CURRENT OPINION IN COLLOID & INTERFACE SCIENCE
卷 19, 期 4, 页码 343-354出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.cocis.2014.04.009
关键词
Nanostructure; Superhydrophobicity; Superoleophobicity; Superomniphobicity
资金
- ERC [340391-SuPro]
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. (C) 2014 Elsevier Ltd. All rights reserved.
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