20.500.12556/RUL-174857 Vpliv hidrofobne prevleke na adhezijo ledu na gladkih in strukturiranih površinah Effect of a hydrophobic coating on ice adhesion on smooth and structured surfaces Naloga obravnava adhezijo ledu na površini, katere zmanjšanje predstavlja velik izziv za izboljšanje obratovanja inženirskih sistemov v aplikacijah pri nizkih temperaturah. Led, ki se v takih primerih nabere na površini, želimo čim lažje odstraniti, zato se poslužujemo različnih pristopov obdelave površine. V delu smo z uporabo horizontalnega strižnega testa adhezije in meritev kota omočenja ter kota zdrsa ovrednotili različne kombinacije površinskih obdelav in hidrofobnih prevlek. Z meritvami zakasnitve in temperature zmrzovanja vodnih kapljic na površinah pa smo ovrednotili protizmrzovalne lastnosti površin. Naša analiza je pokazala da je za odstranjevanje ledu najboljša kombinacija površine brez predobdelave s fluorirano prevleko. S takim pristopom k obdelavi površine smo uspešno znižali adhezijo ledu za 71 % napram popolnoma neobdelani površini, kar predstavlja ugoden pristop za pasivno preprečevanje posledic zaledenitve v praksi The thesis addresses ice adhesion on surfaces, where reducing adhesion represents a major challenge for improving the operation of engineering systems in low-temperature applications. In such cases, ice that accumulates on the surface should be removed as easily as possible, which is why different surface treatment approaches are used. In this thesis, we evaluated various combinations of surface treatments and hydrophobic coatings through horizontal shear adhesion tests as well as measurements of the contact angle and sliding angle. By measuring freezing delay and freezing temperature of water droplets, we determined the icephobic properties of the surfaces. Our analysis showed that the best combination for easy ice removal is a surface without pretreatment with a fluorinated coating. With this surface treatment approach, we successfully reduced ice adhesion by 71 % compared to the untreated surface, representing a favorable approach for passive alleviation of icing issues in practice. adhezija ledu kot omočenja prevleke gladke površine strukturirane površine nukleacija ledu ice adhesion contact angle coatings smooth surfaces structured surfaces ice nucleation true false false Slovenski jezik Angleški jezik Diplomsko delo/naloga 2025-10-10 08:30:26 2025-10-10 08:30:29 2025-11-30 04:01:28 0000-00-00 00:00:00 2025 0 0 XX, 51 str. 2025 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 532.64:539.61-032.24(043.2) 277237 252835587 45425.pdf 45425.pdf 1 1176F2276C22237A83827122412617AC 96ebb31c352dbe6c0d53c8be7f1747c73af9ea244b1a808cb60a3d0f9ad5b3db 5fc4f8a7-a5a2-11f0-9328-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=219754 Fakulteta za strojništvo 0 0 0