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Fabrication of functional superhydrophobic surfaces on carbon fibre reinforced plastics by IR and UV direct laser interference patterning

: Hauschwitz, Petr; Jagdheesh, R.; Alamri, Sabri; Rostohar, D.; Kunze, Tim; Brajer, J.; Kopecek, Jaromir; Mocek, Tomas


Applied surface science 508 (2020), Art. 144817
ISSN: 0169-4332
Journal Article
Fraunhofer IWS ()
direct laser interference patterning; carbon fibre reinforced plastics; Superhydrophobic; surface functionalization

The fabrication of functional microstructures on surfaces by laser enables unique material properties and is presently a leading research topic. This work addresses the production of functional hierarchical microstructures on carbon fibre reinforced polymer composites in order to control the wettability properties of the material. Two-beam Direct Laser Interference Patterning using either ultraviolet (263 nm) or infrared (1053 nm) nanosecond laser source is employed to produce melt-free and well-defined hierarchical microstructures on carbon fibre reinforced plastics. The resulting water contact angles after thin film deposition of 1H,1H,2H,2H-Perflorodecyl-triethoxysilane were analysed with respect to structure depth and quality. The maximum static contact angle of 171° is demonstrated for dual hierarchical microstructures composed of 11 µm deep large-scale pillars, covered by 1.7 µm pillars, both fabricated in a single step.