![]() These properties have shown recently an increased importance due to the many different applications where aluminium is used 1, 2, 3. Finally, dynamic tests of droplets imping the treated aluminium surfaces cooled down to −20 ☌ revealed that only on the hierarchically patterned surface, the droplets were able to bounce off the substrate.Ĭurrently, modification of aluminium surfaces to obtain superhydrophobic and ice-repellent properties presents a challenging task. Using finite element simulations, it was found that the main reason behind the ice-prevention is the change in the droplet geometrical shape due to the hydrophobic nature of the treated surfaces. The patterned surfaces also showed ice-repellent properties characterized by a near three-fold increase in the droplets freezing times compared to the untreated samples. In addition, these experiments were repeated at substrate temperatures from −30 ☌ to 80 ☌ allowing to determine three wettability behaviours as a function of the temperature. Water contact angle tests at room temperature showed that all produced patterns reached the superhydrophobic state after 13 to 16 days. In addition, hierarchical textures are produced combining both mentioned laser based methods. Different periodic patterns with feature sizes ranging from 7.0 to 50.0 µm are produced. ![]() In this work, multifunctional structures are manufactured by direct laser writing and direct laser interference patterning methods using pulsed infrared laser radiation (1064 nm). Fabricating aluminium surfaces with superhydrophobic and ice-repellent properties present nowadays a challenging task.
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