Fast fabrication of super-hydrophobic surfaces on polypropylene by replication of short-pulse laser structured molds |
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Authors: | J. Bekesi J. J. J. Kaakkunen W. Michaeli F. Klaiber M. Schoengart J. Ihlemann P. Simon |
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Affiliation: | (1) National Research Council Canada, Industrial Materials Institute, Boucherville, QC, Canada; |
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Abstract: | A new two-step method, facilitating the rapid generation of super-hydrophobic surface structures via parallel laser processing followed by a replica generation by injection molding is reported. A self-made fused silica-based diffractive optical element (DOE) is applied to distribute the laser energy into a 25×25 dot matrix. This DOE is used as a transmission mask for surface ablation of metal molds, applying short-pulse UV laser pulses. In a subsequent process step, replicas of the processed stamp are produced by variothermal injection molding, enabling the mass production of the surface pattern on plastics parts. The resulting topography facilitates a super-hydrophobic behavior of the fabricated components. |
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