Journal
PROGRESS IN ORGANIC COATINGS
Volume 87, Issue -, Pages 155-160Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.porgcoat.2015.05.028
Keywords
Bamboo surface; Superhydrophobicity; Superhydrophilicity; Wettability; ZnO nanosheet arrays
Funding
- National Natural Science Foundation of China [31470586]
- Research Center of Biomass Resource Utilization, Zhejiang A F University [2013SWZ01-03]
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Functional bamboo surfaces with reversibly tunable wettability have become much sought after because of their usefulness in sustainable material protection strategies and industrial applications. In this paper, the hybrid ZnO/bamboo surfaces with reversibly light-switchable wettability between superhydrophobicity and superhydrophilicity were successfully prepared via a hydrothermal method at low temperature. The bamboo substrates served as adhesion, and the well-aligned ZnO nanosheet arrays (WZNA) were deposited on the bamboo surfaces after a hydrothermal process. A subsequent chemical treatment with octadecyltrichlorosilane (OTS) led to a superhydrophobic surface with a water contact angle (WCA) up to 153 degrees. Under UV irradiation, the WCA decreased gradually, and the surface eventually became superhydrophilic because of hydroxyl absorption on the ZnO surfaces. The wetting behavior of the WZNA can be reversibly switched between superhydrophilic and superhydrophobic via alternation of UV exposure for 12 h and dark storage for 10 days. (C) 2015 Elsevier B.V. All rights reserved.
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