Ice accretion has a negative impact on critical infrastructure, as well as a range of commercial and residential activities. Icephobic surfaces are defined by an ice adhesion strength tice &lt; 100 kPa. However, the passive removal of ice requires much lower values of tice, such as on airplane wings or power lines (tice &lt; 20 kPa). Such low tice values are scarcely reported, and robust coatings that maintain these low values have not been reported previously. Here we describe how irrespective of material chemistry, by tailoring the crosslink density of different elastomeric coatings, and by enabling interfacial slippage, it is possible to systematically design durable coatings with extremely low ice-adhesion (tice&lt; 0.2 kPa). Additionally, typically the force required to remove ice from a surface is considered to scale with the iced area. This imparts a scalability limit to the use of icephobic coatings for structures with large surface areas, such as power lines or ship hulls. Wehave devloped a class of materials that exhibit a low interfacial toughness with ice, resulting in systems for which the forces required to remove large areas of ice (few cm2 or greater) are both low and independent of the iced area. Coatings made of such materials allow ice to be shed readily from large areas (~1m2) merely by self-weight.

Novel ice-shedding surfaces

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ACS Fall 2022

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