Abstract
This paper describes coatings on wood surfaces made by dipping the wood into solutions of different alkoxysilanes. The silanes used as precursors contain different organic groups [R’Si(OR’’)]. These materials tend to deposit as inorganic–organic polymeric films, where the organic groups (aliphatic hydrocarbons, fluorinated hydrocarbons or aromatic substituents) show hydrophobic properties, which reduce the wettability of the surface. The effects of these treatments on the wood surface were extensively studied using various analytical techniques: scanning electron microscopy with energy dispersive X-ray spectrometry, Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, water contact angle measurements, and flame resistance tests. The resulting data show that the chemical treatment changes the wood’s surface energy, reducing its wettability and reaction to fire. The main innovative finding of this research is that the coatings obtained from a cheaper precursor have a similar performance to that of the more expensive precursors normally used.
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Acknowledgments
The Provincia Autonoma di Trento (PAT, Italy) is gratefully acknowledged for its financial support for the “CeNaCoLi” project entitled “Nanostructured metal oxide and organic–inorganic hybrid coatings for cellulose and lignin (paper and wood) for preservation against fungi and chemical attack, and as a flame retardant”. Mr. Renato Leveghi’s technical support is also gratefully acknowledged.
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Cappelletto, E., Maggini, S., Girardi, F. et al. Wood surface protection with different alkoxysilanes: a hydrophobic barrier. Cellulose 20, 3131–3141 (2013). https://doi.org/10.1007/s10570-013-0038-9
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DOI: https://doi.org/10.1007/s10570-013-0038-9