期刊
APPLIED SURFACE SCIENCE
卷 610, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.155356
关键词
Nanosecond laser texturing; Superamphiphobic and superhydrophobic surfaces; Environment-friendly superhydrophobic
Controlled wetting of metallic surfaces is achieved through laser processing and surface coating. The study demonstrates the micro/nano-texturing of an aluminum surface with a nanosecond laser and the possibility of tuning the repelling properties. An inexpensive, environment-friendly, and simpler surface treatment for superhydrophobicity is developed, providing an alternative to traditional coatings. The surfaces show good performance and self-cleaning properties.
Controlled wetting of metallic surfaces is highly interesting in many practical applications, from self-cleaning to drag reduction. Laser processing to obtain micro-/nano-textured surfaced to obtain superhydrophobic has mainly leveraged expensive and low throughput pico-/femto-second ultrashort pulse lasers. In this study, we demonstrate the micro/nano-texturing of an aluminum surface with a nanosecond laser and the possibility of tuning the repelling properties by varying the laser pulse duration in the range 4-50 ns, and the scan line spacing in the range 40-140 mu m. We also compare two different surface treatment approaches based on a fluorosilane and a flaxseed oil vapor coating obtaining superamphiphobic and superhydrophobic behavior, respectively. In the case of oil vapor treated superhydrophobic surface, we developed an inexpensive, environment-friendly, faster, and simpler surface treatment for hydrocarbon adsorption-based superhydrophobicity (contact angle similar to 160 degrees), providing an alternative to silane-based coatings. Static and dynamic characterization of the surfaces obtained showed good performance, also demonstrating a self-cleaning property. These surfaces also demonstrate a good durability in line with the state-of-the-art. The combination of nanosecond laser texturing and the coating treatment proposed has the potential for scaling in many industrial applications given the ease of processing.
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