Effect of Cassie-Baxter versus Wenzel states on ice adhesion: A fracture toughness approach

Ice adhesion to superhydrophobic surfaces is most of the time studied regarding their wetting properties, in attempts predict best candidates promote low ice adhesion. However, no clear correlation between water repellency and has yet been defined, thus limiting development empirical testing. The present study puts forward a mechanical based approach (usually used for bonded joints) rationalize role surface structure on Experimental observations single microtextured substrate form basis fracture toughness analysis. Compared smooth aluminum substrate, shear measurements show that increased by 30% when penetrated microgrooves (Wenzel ice) or decreases 36% air remained trapped beneath (Cassie ice). Post-mortem were performed using replica technique. Formulas derived compute interfacial Cassie Wenzel ice, depending geometry microtexture. was then as an input parameter into finite element model comprising cohesive zone layer interface. This semi-analytical gave values good agreement with experimental results, showing relevance