Figure 5.

Super-amphiphobicity assessed under impact studies. Droplet impact analysis on the as-developed G4 (reaction grafting ratio of 4:1) super-amphiphobic coatings, showcasing clean droplet impact and detachment from (a) water, (b) ethylene glycol, and (c) hexadecane. (d) Contact-angle hysteresis measurements (G1 to G20, reaction grafting ratios of 1:1 to 20:1) by using a hexadecane probe liquid (γ = 27.5 mN/m). A measurement of 180° indicates super-lyophilic properties, while ultra-low CAH values were obtained at and beyond a reaction grafting ratio of 4:1. Stable wetting behavior is observed throughout the entire advancing–receding cycle for all surfaces. (e) Analysis of the capillary inertial dynamics via the pre-factor of G4 (reaction grafting ratio of 4:1). The pre-factor under super-hydrophobic impact is consistent (ca. 3–3.5) and can be scaled by a linear line. The pre-factor under super-amphiphobic impact is scaled with an exponential curve, with sharp increments in magnitude under the use of low-surface-tension liquids such as hexadecane, toluene, and xylene.