Journal
MATERIALS
Volume 13, Issue 17, Pages -Publisher
MDPI
DOI: 10.3390/ma13173816
Keywords
laser irradiation; microtextures; surface modification; superhydrophobicity; functional surface; titanium alloys
Categories
Funding
- National Natural Science Foundation of China [51805343]
- Natural Science Foundation of Jiangsu Province [BK20180844]
- Postdoctoral Research Foundation of China [7131703318]
Ask authors/readers for more resources
Laser irradiation is a popular method to produce microtextures on metal surfaces. However, the common laser-produced microtextures were hierarchical (multiscale), which may limit their applicability. In this paper, a method of two-step laser irradiation, combining first-step strong ablation and sequentially second-step gentle ablation, was presented to produce micron-rough surface with single-scale microtextures. The effect of laser fluence on the Ti-6Al-4V surface morphology and wettability were investigated in detail. The morphology results revealed that the microtextures produced using this method gradually evolved from multiscale to single-scale meanwhile from microprotrusions to microholes with increasing the second-step laser fluence from 0.0 to 2.4 J/cm(2). The wettability and EDS/XPS results indicated that attributing to the rich TiO(2)content and micron roughness produced by laser irradiation, all the two-step laser-irradiated surfaces exhibited superhydrophilicity. In addition, after silanization, all these superhydrophilic surfaces immediately turned to be superhydrophobic with close water contact angles of 155-162 degrees. However, due to the absence of nanotextures, the water-rolling angle on the superhydrophobic surfaces with single-scale microtextures distinctly larger than those with multiscale ones. Finally, using the two-step laser-irradiation method and assisted with silanization, multifunctional superhydrophobic Ti-6Al-4V surfaces were achieved, including self-cleaning, guiding of the water-rolling direction and anisotropic water-rolling angles (like the rice-leaf), etc.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available