| Pacific Rim Symposium on Surfaces, Coatings and Interfaces (PacSurf 2018) | |
| Nanomaterials | Tuesday Sessions |
| Session NM-TuE |
| Session: | Magnetic Properties and Nanocomposites |
| Presenter: | Bartlomiej Przybyszewski, Warsaw University of Technology, Poland |
| Authors: | B. Przybyszewski, Warsaw University of Technology, Poland R.K. Kozera, Technology Partners Foundation, Poland A. Boczkowska, Warsaw University of Technology, Poland A.G. Gonzalez-Elipe, Instituto de Ciencia de Materiales de Sevilla, Spain A.B. Borras, Instituto de Ciencia de Materiales de Sevilla, Spain |
| Correspondent: | Click to Email |
Laser Patterning (LP) is a versatile tool for the fabrication of micro and sub-micropatterns on different materials. Inspired by typical plant surfaces with super-hydrophobic character such as lotus leaves and rose petals, structured hydrophobic surfaces have been prepared to discuss the wettability properties. In this work, LP was used to produce periodic surface structures on modified polyurethane (PU) coatings with periods ranging from 10 to 30 μm. The influence of the different modifications of PU as well as topographical characteristics of the produced micropatterns on coatings’ wettability and icephobicity was investigated. The morphologies of structured samples include linear, square and rhombic protuberances. 2024 Al alloy and commercially available polyurethane topcoat, an extensively used materials in aircrafts and marine vessels, were employed as the substrates. To characterize the surface topography of the produced structures Scanning Electron Microscopy and Laser Profilometry were utilized. Static contact angle (SCA) and contact angle hysteresis (CAH) have been determined using standard wettability tests. Ice accretion, ice adhesion and freezing delay time tests have been carried out to assess icephobic properties of investigated coatings. It was found that prepared structured surfaces showed hydrophobic property with a WCA as high as 170° and CAH lower than 10°. Measurements of the contact angle of water on the treated surfaces allowed to identify an wetting behavior depending mainly on the laser period, surface roughness and chemical composition of investigated surfaces.