Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 6, Issue 10, Pages 4458-4465Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta10510j
Keywords
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Funding
- Engineering and Physical Sciences Research Council (EPSRC) [EP/M025187/1]
- Royal Society 'Research Grant' Scheme
- Engineering and Physical Sciences Research Council [EP/M025187/1] Funding Source: researchfish
- EPSRC [EP/M025187/1] Funding Source: UKRI
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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/microrough 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.
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