Evaluating the resilience of superhydrophobic materials using the slip-length concept



Xu, Haonan, Crick, CR ORCID: 0000-0001-9674-3973 and Poole, R ORCID: 0000-0001-6686-4301
(2018) Evaluating the resilience of superhydrophobic materials using the slip-length concept. Journal of Materials Chemistry A, 6. 4458 - 4465.

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Abstract

The drive to introduce superhydrophobic materials into real-world applications requires the development of robust and effective surfaces. Efforts to formulate a collective understanding of the design approaches required to engineer resilience are hindered significantly by inconsistencies in the evaluation methods used throughout the literature. Herein, we report a technique that accurately quantifies both the superhydrophobicity, and superhydrophobic resilience under fluid shear stress, using slip-length measurements. Two types of superhydrophobic surface are used (micro-rough PTFE, and nano/micro-rough nanoparticle coatings), in order to demonstrate the different mechanisms of superhydrophobic degradation, in addition to the versatility of the slip-length technique to study the phenomena. The shear stress testing is symptomatic of real-world conditions (applied fluid stress), an environment where superhydrophobic materials are relatively vulnerable due to their comparative fragility. The technique is both a comprehensive, sensitive and quantitatively reproducible, assessment method of superhydrophobic interfaces, which if widely adopted, would accelerate progress in this area.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 07 Mar 2018 07:19
Last Modified: 03 Sep 2022 07:13
DOI: 10.1039/C7TA10510J
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3018702