研究目的
To introduce a fast, cost-effective, and environmentally friendly fabrication of superhydrophobic surfaces on aluminium alloy 7075 using a low-cost commercial nanosecond IR fiber laser in combination with vacuum processing.
研究成果
Well-defined microstructures were fabricated with an affordable nanosecond laser source. Vacuum processing significantly reduced the time needed for hydrophilic to hydrophobic transition. Ultrahydrophobic surfaces with contact angles over 170° and sliding angles below 5° were obtained, demonstrating the potential for applications requiring superhydrophobic properties.
研究不足
The study focuses on aluminium alloy 7075 and the specific conditions of laser processing and vacuum storage. The applicability to other materials or under different conditions is not explored.
1：Experimental Design and Method Selection:
A nanosecond Ytterbium fiber laser was used to fabricate superhydrophobic surfaces on aluminium alloy
2：The process parameters included varying hatch distances to create different surface geometries. Sample Selection and Data Sources:
70 Aluminium alloy 7075 samples with dimensions of 20 mm x 20 mm x 5 mm were used.
3：List of Experimental Equipment and Materials:
Omron MX-MI20B nanosecond Ytterbium fiber laser, Tescan FERA 3 scanning electron microscope, Olympus OLS5000 confocal microscope, AXIS Supra photoelectron spectrometer, OCA 15EC optical contact angle measuring device.
4：Experimental Procedures and Operational Workflow:
Samples were processed with the laser, then stored in high vacuum for 4 hours. Wettability was evaluated by measuring static contact angle and sliding angle.
5：Data Analysis Methods:
Surface morphology was investigated with SEM and confocal microscopy. Chemical composition was characterized by XPS. Wettability was evaluated through contact angle measurements.
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Omron MX-MI20B
MX-MI20B
Omron
Nanosecond Ytterbium fiber laser used for fabricating superhydrophobic surfaces.
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Olympus OLS5000
OLS5000
Olympus
Confocal microscope used for investigating surface morphology.
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AXIS Supra
Supra
Kratos Analytical Ltd.
Photoelectron spectrometer used for characterizing chemical composition of sample surfaces.
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Tescan FERA 3
FERA 3
Tescan
Scanning electron microscope used for investigating surface morphology.
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OCA 15EC
15EC
Data Physics Instruments
Optical contact angle measuring device used for evaluating wettability.
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