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Mechanical durability of superhydrophobic surfaces: the role of surface modification technologies

Zhi, Jing-Hui; Zhang, Li-Zhi; Yan, Yuying; Zhu, Jie

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Authors

Jing-Hui Zhi

Li-Zhi Zhang

YUYING YAN YUYING.YAN@NOTTINGHAM.AC.UK
Professor of Thermofluids Engineering



Abstract

Various surface modification technologies have been used to develop superhydrophobic surface, however their durability has been recognized as the major obstacle for the real applications. Here a quantitative investigation was conducted to evaluate the effects of different surface modification methods on the surfaces’ mechanical durability. The superhydrophobic surfaces were prepared by the combination of two surface roughing methods (etching and sandblasting) with chemical modifications with four low surface energy materials: silica sol (SS), octadecanoic acid (OA), heptadecafluoro-1,1,2,2-tetrahydrodecyltrichlorosilane (HDFS) and hexadecyltriethoxysilane (HTS). XPS was used to analyze the elements composition and AFM was used to measure the roughness of the surfaces. The durability of these surfaces was tested by a sandpaper abrasion experiment. The collective results showed that the low surface energy materials had significant effects on the surface roughness, which would then play an important role in the durability of these rough surfaces. The SS modified rough surfaces possessed higher roughness and better durability than the surfaces modified by other three low surface energy materials. SS modified rough surfaces could bear 60 cycles of abrasion with 10 g weights on 1500 CW sandpaper.

Citation

Zhi, J.-H., Zhang, L.-Z., Yan, Y., & Zhu, J. (2017). Mechanical durability of superhydrophobic surfaces: the role of surface modification technologies. Applied Surface Science, 392, https://doi.org/10.1016/j.apsusc.2016.09.049

Journal Article Type Article
Acceptance Date Sep 12, 2016
Online Publication Date Sep 14, 2016
Publication Date Jan 15, 2017
Deposit Date Oct 31, 2016
Publicly Available Date Oct 31, 2016
Journal Applied Surface Science
Print ISSN 0169-4332
Electronic ISSN 1873-5584
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 392
DOI https://doi.org/10.1016/j.apsusc.2016.09.049
Keywords Superhydrophobic; Surface roughness; Low surface energy material; Durability; Abrasion; Sandblast
Public URL https://nottingham-repository.worktribe.com/output/840365
Publisher URL http://www.sciencedirect.com/science/article/pii/S0169433216319171
Contract Date Oct 31, 2016

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