Abstract
Robust, buoyant, superhydrophobic PVB/SiO2 coatings were successfully formed on wood surface through a one-step solvothermal method and a nanoimprint lithography method. The as-prepared PVB/SiO2/wood specimens were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Fourier transform infrared (FT-IR), thermogravimetric/differential thermogravimetric (TG–DTG) analyses. The superhydrophobic property and abrasion resistance of rose-petal-like wood were measured and assessed by water contact angle (WCA) and sand abrasion tests. The results show that PVB/SiO2/wood not only exhibited a robust superhydrophobic performance with a WCA of 160° but also had excellent durability and thermostability during the sand abrasion tests and against corrosive liquids. Additionally, the as-prepared PVB/SiO2/wood specimens show high buoyancy.
Highlights
Natural wood, a low-cost and earth-abundant material, is ubiquitously used as a structural material across the globe[1,2]
A petal-like PVB/SiO2 superhydrophobic wood was successfully fabricated by using red rose petals, and cross-linked PDMS was used as the master template and stamp for nanoimprinted lithography after solvothermal deposition
This coating was plated on a natural wood surface, with the same replicate process, but the inverse petal structure cross-linked PDMS stamp was used as the master template to produce a petal-like structure
Summary
A low-cost and earth-abundant material, is ubiquitously used as a structural material across the globe[1,2]. Learning from nature, many researchers have discovered many functional interfacial materials for applications, including materials with zwitter-wettability, superhydrophobicity, adhesion, self-cleaning, anti-snow, anti-fogging/icing, anti-oxidation, and corrosion-resistancepropeerties[8,9,10,11,12,13,14,15,16,17,18]. To the best of our knowledge, there are no reports about the fabrication of a superhydrophobic surface with outgrowth-induced high buoyancy on wood by a two-step method of solvothermal deposition and nanoimprinted lithography. A petal-like PVB/SiO2 superhydrophobic wood was successfully fabricated by using red rose petals, and cross-linked PDMS was used as the master template and stamp for nanoimprinted lithography after solvothermal deposition. Petal-like PVB/SiO2 superhydrophobic wood could effectively prevent moisture from penetrating wood and improve the dimensional stability, which can satisfy our daily life application needs
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