Gradient structure based dual-robust superhydrophobic surfaces with high-adhesive force

[Display omitted] •Dual-robust superhydrophobic surfaces with a high adhesive state were made.•Gradient structure based multi-scale micro- and nano- structures were showed.•The structure-property relationship was discussed and built. Dual-robust (mechanical and chemical robust) superhydrophobic surf...

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Bibliographic Details
Published in:Applied surface science 2019-01, Vol.463, p.427-434
Main Authors: Zhu, Huibin, Hu, Weihong, Xu, Yadong, Wang, Binghao, Zheng, Ding, Fu, Yizheng, Zhang, Congyun, Zhao, Guizhe, Wang, Zhi
Format: Article
Language:English
Subjects:
Benzoxazine
Dual-robust
Gradient structure
High adhesive
Superhydrophobic surface
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Summary:[Display omitted] •Dual-robust superhydrophobic surfaces with a high adhesive state were made.•Gradient structure based multi-scale micro- and nano- structures were showed.•The structure-property relationship was discussed and built. Dual-robust (mechanical and chemical robust) superhydrophobic surfaces with a high adhesive state have aroused lots of attention for their potential application in liquid transportation, biochemical separation and in situ detection devices. Herein, we design a gradient structure based multi-scale micro- and nano-structures (inorganic-organic interpenetrating structures, self-similar sacrificial structures and micro-nano structures) to realize dual robust superhydrophobic surfaces by spraying method. Upon changing the fabrication process, three kinds of superhydrophobic surfaces were made based on benzoxazine, mesoporous SiO2 and imidazole. A rigorous sandpaper abrasion test, chemical resistance test (pH = 1–14, 12 h) and anticorrosion test were carried out to exhibit the environmental stability of the system. High adhesive properties of surfaces were demonstrated by adhering water test. The clear multi-scale structures are showed and its relationship with properties is built. Scanning electron microscope was used to examine different structures and the gradient structure in system. The gradient structure based dual-robust superhydrophobic surfaces give a promising prospect for water transportation application in their large-scale and low-cost fabrication method and super mechanical and chemical robust.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2018.08.241