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Picosecond Laser Surface Texturing of a stavax Steel Substrate for Wettability Control

Engineering 2018年第6期4卷 816-821页

作者： Xincai Wang Hongyu Zheng Yinchi Wan Wenhe Feng Yee Cheong Lam Singapore Institute of Manufacturing Technology(SIMTech) A*STARSingapore 138634Singapore SIMTech-NTU Joint Laboratory(Precision Machining) Nanyang Technological UniversitySingapore 639798Singapore School of Mechanical Engineering Shandong University of TechnologyZibo 255000China

In this investigation,a picosecond laser was employed to fabricate surface textures on a stavax steel substrate,which is a key material for mold fabrication in the manufacturing of various polymer *** main types of surface textures were fabricated on a stavax steel substrate:periodic ripples,a two-scale hierarchical two-dimensional array of micro-bumps,and a micro-pits array with *** wettability of the laser-textured stavax steel surface was converted from its original hydrophilicity into hydrophobicity and even super-hydrophobicity after exposure to *** results clearly show that this super-hydrophobicity is mainly due to the surface *** ultrafast laserinduced catalytic effect may play a secondary role in modifying the surface chemistry so as to lower the surface *** laser-induced surface textures on the metal mold substrates were then replicated onto polypropylene substrates via the polymer injection molding *** surface wettability of the molded polypropylene was found to be changed from the original hydrophilicity to *** developed process holds the potential to improve the performance of fabricated plastic products in terms of wettability control and easy cleaning.

关键词： Picosecond laser Surface texturing stavax steel Polymer Hydrophobicity

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