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Droplet impact on the super-hydrophobic surface with micro-pillar arrays fabricated by hybrid laser ablation and silanization process
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Xia, Zhenyan, Xiao, Yuhe, Yang, Zhen, Li, Linan, Wang, Shibin, Tian, Yanling and Liu, Xianping (2019) Droplet impact on the super-hydrophobic surface with micro-pillar arrays fabricated by hybrid laser ablation and silanization process. Materials, 12 (5). 765. doi:10.3390/ma12050765 ISSN 1996-1944.
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WRAP-droplet-impact-super-hydrophobic-surface-micro-pillar-arrays-fabricated-hybrid-laser-ablation-silanization-process-Tian-2019.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (4Mb) | Preview |
Official URL: https://doi.org/10.3390/ma12050765
Abstract
A super-hydrophobic aluminum alloy surface with decorated pillar arrays was obtained by the hybrid laser ablation and further silanization process. The as-prepared surface showed a high apparent contact angle of 158.2 ± 2.0° and low sliding angle of 3 ± 1°. Surface morphologies and surface chemistry were explored to account for the generation process of super-hydrophobicity. The main aim of this current work is to investigate the maximum spreading factor of water droplets impacting on the pillar-patterned super-hydrophobic surface based on the energy conservation concept. Although many previous studies have investigated the droplet impacting behavior on flat solid surfaces, the empirical models were proposed based on few parameters of the Reynolds number (Re), Weber number (We) as well as the Ohnesorge number (Oh), causing the limitation for the super-hydrophobic surfaces due to the ignorance of geometrical parameters of the pillars and viscous energy dissipation for liquid flow within the pillar arrays. In this paper, the maximum spreading factor was deduced from the perspective of energy balance, and the predicated results were in good consistent with our experimental data with a mean error of 4.99% and standard deviation of 0.10.
Item Type: | Journal Article | ||||||||||||||||||||||||
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Subjects: | Q Science > QD Chemistry T Technology > TS Manufactures |
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Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||||||||||||||
Library of Congress Subject Headings (LCSH): | Hydrophobic surfaces, Aluminum alloys | ||||||||||||||||||||||||
Journal or Publication Title: | Materials | ||||||||||||||||||||||||
Publisher: | M D P I AG | ||||||||||||||||||||||||
ISSN: | 1996-1944 | ||||||||||||||||||||||||
Official Date: | 6 March 2019 | ||||||||||||||||||||||||
Dates: |
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Volume: | 12 | ||||||||||||||||||||||||
Number: | 5 | ||||||||||||||||||||||||
Article Number: | 765 | ||||||||||||||||||||||||
DOI: | 10.3390/ma12050765 | ||||||||||||||||||||||||
Status: | Peer Reviewed | ||||||||||||||||||||||||
Publication Status: | Published | ||||||||||||||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||
Date of first compliant deposit: | 29 April 2019 | ||||||||||||||||||||||||
Date of first compliant Open Access: | 30 April 2019 | ||||||||||||||||||||||||
RIOXX Funder/Project Grant: |
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