Journal
APPLIED SURFACE SCIENCE
Volume 280, Issue -, Pages 686-692Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2013.05.043
Keywords
Superhydrophobic; Mechanical robustness; PVA/SiO2; Wood surface
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Funding
- Fundamental Research Funds for the Central Universities [DL12EB05-01]
- Program for New Century Excellent Talents in University [NCET-10-0311]
- National Natural Science Foundation of China [31000271]
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Improvement of the robustness of superhydrophobic surfaces is crucial for the purpose of achieving commercial applications of these surfaces in such various areas as self-cleaning, water repellency and corrosion resistance. We have investigated a fabrication of polyvinyl alcohol (PVA)/silica (SiO2) composite polymer coating on wooden substrates with super repellency toward water, low sliding angles, low contact angle hysteresis, and relatively better mechanical robustness. The composite polymer slurry, consisting of well-mixing SiO2 particles and PVA, is prepared simply and subsequently coated over wooden substrates with good adhesion. In this study, the mechanical robustness of superhydrophobic wood surfaces was evaluated. The effect of petaloid structures of the composite polymer on robustness was investigated using an abrasion test and the results were compared with those of superhydrophobic wood surfaces fabricated by other processes. The produced wood surfaces exhibited promising super-hydrophobic properties with a contact angle of 159 degrees and a sliding angle of 4 degrees, and the relatively better mechanical robustness. (C) 2013 Elsevier B.V. All rights reserved.
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