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

Abstract

The work presented details a comprehensive, quantitatively reproducible, and universal assessment method for superhydrophobic materials using the slip-length evaluation.

Preparation of sulfur hydrophobized plasmonic photocatalyst towards durable superhydrophobic coating material

“…However, this mechanical damage caused that both the fluoropolymer and sulfur based layers were lost their superhydrophobicity (see inserted contact angle values) after the peeling. This vulnerability of superhydrophobic surfaces is well known in the literature and it originated from the rough surface and porous structure of these lotus-like coatings [36,37]. However, in our previous paper we also presented that the nature inspired self-healing ability of the artificial coatings could solve this problem, if we can achieve that the damaged surface protrusions can regenerate itself [32].…”

Approaches for Evaluating and Engineering Resilient Superhydrophobic Materials

“…This includes water flow, and water-surface collisions, and ranges from arbitrarily flowing water across a surface, to quantitative techniques (e.g. sheer stress endurance) [34][35][36][37]. Water sheer has been shown to be provide the conditions for testing reversible and non-reversible degradation, while offering in situ monitoring of surface hydrophobicity (detailed in Section 2.3.2- Figure 5).…”

“…The application of water sheer stress provides a direct measurement of the materials resilience to water flow across the surface [34]. In contrast, the wider relevance to other forms of degradation (e.g.…”

“…As mentioned in Section 2.3.1, water sheer can be used to induce superhydrophobic degradation [35]. Controlled water sheer (through the use of rheometry), has been used as a method for progressive monitoring of surface degradation under water sheer [34]. These techniques utilise the slip-length phenomenon demonstrated by superhydrophobic surfaces.…”

“…Surface degradation via physical action, or fluid shear, are commonly considered as target forces to resist [27,28,34]. However, there are a range of degradation sources specific to particular applications.…”