20.500.12556/RUL-170076 Zveza med odpornostjo superhidrofobnih površin na vpade vodnih kapljic in adhezijo ledu Correlation between the resistance of superhydrophobic surfaces to water droplet impacts and ice adhesion V magistrskem delu smo preučevali interakcijo vodnih kapljic s superhidrofobnimi površinami, ter vpliv mikrogeometrije slednjih na adhezijo ledu. Pri pregledu literature smo se osredotočili na mehanizme odboja kapljic, prehod med Cassie-Baxterjevim in Wenzelovim režimom omočenja, ter na metode za določanje adhezije ledu. S kombinacijo laserskega strukturiranja in hidrofobizacije smo pripravili več superhidrofobnih aluminijastih površin različnih mikrogeometrij, na katerih je bilo skupno izvedenih preko 3500 meritev odboja kapljic vode in vodno-glicerinskih zmesi. Iz pridobljenega nabora rezultatov smo s pomočjo strojnega učenja definirali enačbi za napoved izkoristka odboja in maksimalnega faktorja širjenja, kateri smo primerjali z obstoječimi modeli iz literature. Z metodo stiskanja kapljice med dvema površinama smo določili pogoje porušitve Cassie Baxterjevega režima. Z meritvami adhezije ledu na namensko zasnovani progi smo določili potrebno strižno napetost za odstranitev ledene kocke s površine. Na podlagi pridobljenih rezultatov smo analizirali povezavo med površinsko strukturo, odbojem kapljic in adhezijo ledu. In this master’s thesis, we investigated the interaction of water droplets with superhydrophobic surfaces and the influence of surface geometry on ice adhesion. We examined relevant theoretical foundations, including droplet rebound phenomena, transition between Cassie-Baxter and Wenzel regimes, and established methodologies for quantifying ice adhesion. By combining laser structuring and hydrophobization, we prepared several superhydrophobic aluminum surfaces with different microgeometries, on which more than 3500 droplet impact measurements were performed using water and water–glycerol mixtures. Using the collected dataset, machine learning was used to develop equations for predicting the rebound efficiency and the maximum spreading factor, which we compared with existing mathematical models from the literature. Using the droplet compression method between two surfaces, we identified the conditions under which the Cassie–Baxter wetting regime collapses. Through ice adhesion measurements using a custom-built testing setup we determined tje necessary shear strength to remove an ice cube from the surface. Based on the results, we analyzed the relationship between surface structure, droplet rebound behavior, and ice adhesion. superhidrofobne površine omočljivost trk kapljic odboj kapljic stiskanje kapljic adhezija ledu superhydrophobic surfaces wettability droplet impact droplet rebound droplet squeezing/compression ice adhesion true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2025-07-02 12:57:41 2025-07-02 12:57:42 2025-07-03 04:43:06 0000-00-00 00:00:00 2025 0 0 XX, 68 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.6.03:544.722.132:532.64(043.2) 271132 241108995 39113.pdf 39113.pdf 1 6BC1F43C6F4C5ACA929E641AB08F86F1 91257395ec9b31d11f0fce3aeec10cf1d832ff00e883ab02cf90710efef43e84 7b845c20-5731-11f0-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=212000 Fakulteta za strojništvo 0 0 0