Improvement of mechanical robustness of the superhydrophobic wood surface by coating PVA/SiO₂ composite polymer

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• 作者：Feng Liu ; Shuliang Wang ; Ming Zhang ; Miaolian Ma ; Chengyu Wang ; Jian Li
• 关键词：Superhydrophobic ; Mechanical robustness ; PVA/SiO2 ; Wood surface
• 刊名：Applied Surface Science
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：280
• 期：Complete
• 页码：686-692
• 全文大小：1922 K

文摘

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 superhydrophobic properties with a contact angle of 159? and a sliding angle of 4?, and the relatively better mechanical robustness.