Hydrophilic to ultrahydrophobic transition of Al 7075 by affordable ns fiber laser and vacuum processing

0537715 - FZÚ 2021 RIV NL eng J - Journal Article
Hauschwitz, Petr - Jagdheesh, Radhakrishnan - Rostohar, Danijela - Brajer, Jan - Kopeček, Jaromír - Jiříček, Petr - Houdková, Jana - Mocek, Tomáš
Hydrophilic to ultrahydrophobic transition of Al 7075 by affordable ns fiber laser and vacuum processing.
Applied Surface Science. Roč. 505, Mar (2020), s. 1-7, č. článku 144523. ISSN 0169-4332. E-ISSN 1873-5584
R&D Projects: GA MŠMT EF16_013/0001406; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088; GA MŠMT EF15_006/0000674; GA MŠMT LM2015086
EU Projects: European Commission(XE) 739573 - HiLASE CoE
Grant - others:OP VVV - SAFMAT(XE) CZ.02.1.01/0.0/0.0/16_013/0001406; OP VVV - HiLASE-CoE(XE) CZ.02.1.01/0.0/0.0/15_006/0000674
Institutional support: RVO:68378271
Keywords : surface functionalization * ultrahydrophobicity * fiber laser * vacuum processing
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 6.707, year: 2020
Method of publishing: Limited access
http://dx.doi.org/ 10.1016/j.apsusc.2019.144523

A lot of research efforts have been invested in the fabrication of superhydrophobic surfaces in recent years due to many protentional applications in science and industry including anti-icing, self-cleaning and anti-corrosive surfaces. The laser as a non-polluting, precise, and flexible tool can be applied to replicate surface microstructures of extremely water repellent lotus leave surface. In this study, a common nanosecond laser source is used to fabricate super/ultrahydrophobic surfaces with different microstructure designs, contact angles above 170°, and sliding angles below 5°. The freshly processed surface is hydrophilic and becomes hydrophobic and superhydrophobic in a certain time period, which could be dramatically reduced by storing samples in a high vacuum. The transformation in wetting properties is analyzed with respect to surface geometry and surface chemistry.
Permanent Link: http://hdl.handle.net/11104/0315572