Surface Treatment of Oak Wood with Silica Dioxide Nanoparticles and Paraloid B72

Wood is a valuable material with incomparable advantages, though it is susceptible to biotic and abiotic factors action that affect it adversely and shorten its service life. In the current study, the surface modification of oak wood is carried out through brief immersion in a solution of acrylic po...

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Veröffentlicht in:Forests 2024-11, Vol.15 (11), p.1842
Hauptverfasser: Mitani, Andromachi, Kamperidou, Vasiliki, Terzopoulou, Paschalina
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creator Mitani, Andromachi
Kamperidou, Vasiliki
Terzopoulou, Paschalina
description Wood is a valuable material with incomparable advantages, though it is susceptible to biotic and abiotic factors action that affect it adversely and shorten its service life. In the current study, the surface modification of oak wood is carried out through brief immersion in a solution of acrylic polymer Paraloid B72, in which silica dioxide nanoparticles in the form of nanopowder were dissolved at different contents (1, 2, 3, and 4% w/v of the solution) aiming at the elimination of wood material hygroscopicity, and the protection and improvement of other properties. Specifically, the modified and unmodified wood specimens were characterized in terms of physical characteristics (density, equilibrium moisture content, colour, and surface roughness), hygroscopic properties (swelling and absorption percentage) and accelerated weathering performance using xenon light and cycles of moisturizing and drying. The results revealed the dimensional stability of the samples and a significant increase in the hydrophobicity of the modified wood, as well as a significant increase in the resistance to the ageing/weathering factors of oak wood, which was proportional to the increase in the presence of nanoparticles in the Paraloid B72 solution. The colour of the treated samples slightly changed towards darker shades, more reddish and yellowish (with L* to decrease, while a* and b* to slightly increase), though the treated wood revealed higher colour stability. The surface roughness parameters (Ra, Rq, and Rz) increased significantly, restricting the wide application of the treated wood in indoor or outdoor applications where surface roughness constitutes a critical factor. The findings of the current work contribute not only to the production of longer-lasting wood and timber structures, but also to the conservation of the existing weathered heritage timber structures.
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source Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; MDPI - Multidisciplinary Digital Publishing Institute
subjects Abiotic factors
Color
Dimensional stability
Ecosystem components
Humidity
Hydrophobic surfaces
Hydrophobicity
Hygroscopicity
Microorganisms
Moisture content
Moisture resistance
Nanoparticles
Oak
Physical characteristics
Physical properties
Polymers
Radiation
Resistance factors
Service life
Shades
Silica
Silicon dioxide
Surface roughness
Surface stability
Surface treatment
Viscosity
Water content
Weathering
Wood
Wooden structures
Xenon
Zinc oxides
title Surface Treatment of Oak Wood with Silica Dioxide Nanoparticles and Paraloid B72
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