研究目的
Investigating the fabrication of ultralow water adhesion aluminum surfaces using eco-friendly low pressure processing technique and understanding the impact of hierarchical surface structures on wetting properties.
研究成果
Ultrafast laser fabrication combined with low pressure processing significantly reduces the wetting property transformation period. The hierarchical surface structures exhibit extremely low water adhesion with high static contact angles and low sliding angles, making them suitable for applications requiring superhydrophobic surfaces.
研究不足
The study focuses on aluminum surfaces and the specific conditions of low pressure processing. The applicability to other materials or under different environmental conditions is not explored.
1：Experimental Design and Method Selection:
Ultrafast laser machining was used to create grid structures on aluminum sheets. The wetting properties were modified by low pressure processing.
2：Sample Selection and Data Sources:
Aluminum sheets of thickness 200 mm were used. Wetting properties were analyzed using deionized water droplets.
3：List of Experimental Equipment and Materials:
Ultraviolet (355 nm) laser pulses, Galvo scanner, scanning electron microscope (SEM), confocal microscopy, X-ray photo electron spectroscopy (XPS).
4：Experimental Procedures and Operational Workflow:
Laser machining with different spatial shifts (Pitch, P) to create porous nanostructures. Samples were stored in high vacuum for 2 hours at low pressure for chemical modification.
5：Data Analysis Methods:
Static contact angle and sliding angle measurements were performed using sessile drop technique. XPS was used for surface chemistry analysis.
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