Termite resistance of beech wood treated with zinc oxide and zinc borate nanocompounds

2016 ◽  
Vol 13 (1) ◽  
pp. 45-49 ◽  
Author(s):  
Charalampos Lykidis ◽  
Teresa De Troya ◽  
María Conde ◽  
Jorge Galván ◽  
George Mantanis
Keyword(s):  
Zinc Oxide ◽  
Beech Wood ◽  
Zinc Borate ◽  
Termite Resistance

scholarly journals Deposition of Zinc Oxide Coatings on Wood Surfaces Using the Solution Precursor Plasma Spraying Process

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 183
Author(s):  
Ghiath Jnido ◽  
Gisela Ohms ◽  
Wolfgang Viöl
Keyword(s):  
Zinc Oxide ◽  
Ftir Spectroscopy ◽  
Photoelectron Spectroscopy ◽  
Color Change ◽  
Uv Light ◽  
Beech Wood ◽  
Nitrate Solution ◽  
Ftir Spectra ◽  
Solution Precursor ◽  
Wood Surfaces

In the present work, the solution precursor plasma spray (SPPS) process was used to deposit zinc oxide (ZnO) coatings on wood surfaces using zinc nitrate solution as precursor to improve the hydrophobicity and the color stability of European beech wood under exposure to ultraviolet (UV) light. The surface morphology and topography of the wood samples and the coatings were characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM). The formation of ZnO was detected with the help of X-ray photoelectron spectroscopy (XPS) and by Fourier transform infrared (FTIR) spectroscopy. The FTIR spectra of the coated samples showed the typical Zn–O band at 445 cm−1. According to the XPS analysis, the coatings consist of two different Zn-containing species: ZnO and Zn(OH)2. Variation of the deposition parameters showed that the most significant parameters affecting the microstructure of the coating were the solution concentration, the deposition scan speed, and carrier gas flow rate. The wettability behaviors of the coated wood were evaluated by measuring the water contact angle (WCA). The coatings that completely covered the wood substrates showed hydrophobic behaviors. UV-protection of wood surfaces after an artificial UV light irradiation was evaluated by color measurements and FTIR spectroscopy. The ZnO-coated wood surfaces were more resistant to color change during UV radiation exposure. The total color change decreased up to 60%. Additionally, the FTIR spectra showed that the wood surfaces coated with ZnO had more stability. The carbonyl groups formation and C=C-bonds consumption were significantly lower.

Effect of Zinc, Zinc Oxide and Zinc Borate on the Flammability of Polycarbonate

1995 ◽  
Vol 13 (3) ◽  
pp. 224-234 ◽  
Author(s):  
Ramazan Benrashid ◽  
Gordon L. Nelson ◽  
Donald J. Ferm ◽  
Leland W. Chew
Keyword(s):  
Zinc Oxide ◽  
Heat Release ◽  
Oxygen Index ◽  
Ohio State University ◽  
Zinc Borate ◽  
State University ◽  
Dsc Studies ◽  
Release Studies ◽  
Chamber Studies ◽  
Smoke Chamber

Polycarbonate was blended with zinc, zinc borate (2ZnO·3B2O 3·3.5H2O) and zinc oxide. Blends made of zinc/polycarbonate and especially zinc borate/polycarbonate show major improvement in oxygen index values. Ohio State University (OSU) heat release studies show reduction in heat release only for zinc borate/polycarbonate blends compared to virgin polycarbonate. No improvement in smoke suppression was observed from NBS Smoke Chamber studies for these blends. From DSC studies there was a low ering of Tg's. Thermogravimetric analyses show the blends have lower tempera ture stability in nitrogen (50% weight loss) compared to a control.

Effects of nano-sized zinc oxide and zinc borate impregnation on brown rot resistance of black pine (Pinus nigraL.) wood

2013 ◽  
Vol 8 (4) ◽  
pp. 242-244 ◽  
Author(s):  
Charalampos Lykidis ◽  
George Mantanis ◽  
Stergios Adamopoulos ◽  
Konstantina Kalafata ◽  
Ioannis Arabatzis
Keyword(s):  
Zinc Oxide ◽  
Brown Rot ◽  
Zinc Borate ◽  
Black Pine

scholarly journals Weath ering Performance of Beech Wood Coated with Acrylic Paint Containing UV Stabilizers of Dihydroxy Benzophenone and Nano Zinc Oxide

2020 ◽  
Vol 71 (4) ◽  
pp. 403-409
Author(s):  
Mehrnaz Akbarnezhad ◽  
Davood Rasouli ◽  
Hossein Yousefi ◽  
Mahdi Mashkour
Keyword(s):  
Contact Angle ◽  
Zinc Oxide ◽  
Beech Wood ◽  
Mold Growth ◽  
Acrylic Paint ◽  
Color Changes ◽  
Acrylic Coating ◽  
Nano Zinc Oxide ◽  
Water Based ◽  
Nano Zinc

In this study, the effect of UV stabilizers (dihydroxy benzophenone and nano zinc oxide) on the weathering degradation of water-based acrylic coating on beech wood was investigated. The wood specimens were coated by brush and then weathered naturally for six months. The obtained results showed that the use of nano zinc oxide reduced color changes and mold growth on the surface of weathered samples. However, the results of contact angle, pull-off adhesion, colorimeter and FTIR revealed that the dihydroxyl benzophenone was not effective in preventing weathering degradation of coated wood.

Termite resistance of wood–plastic composites treated with zinc borate and borax

2014 ◽  
Vol 29 (2) ◽  
pp. 281-293 ◽  
Author(s):  
Edgar J López-Naranjo ◽  
Liliana M Alzate-Gaviria ◽  
Galdy Hernández-Zárate ◽  
Javier Reyes-Trujeque ◽  
Ricardo H Cruz-Estrada
Keyword(s):  
Zinc Borate ◽  
Wood Plastic Composites ◽  
Termite Resistance ◽  
Plastic Composites

Biological resistance of pine wood treated with nano-sized zinc oxide and zinc borate against brown-rot fungi

2016 ◽  
Vol 74 (6) ◽  
pp. 909-911 ◽  
Author(s):  
Charalampos Lykidis ◽  
Miklos Bak ◽  
George Mantanis ◽  
Robert Németh
Keyword(s):  
Zinc Oxide ◽  
Brown Rot ◽  
Zinc Borate ◽  
Pine Wood ◽  
Biological Resistance ◽  
Brown Rot Fungi

scholarly journals A novel approach for the production of zinc borate (4ZnO·B2O3·H2O) using a single-step hydrothermal method

2020 ◽  
Vol 44 (1) ◽  
pp. 1-8
Author(s):  
Ali Yalçın ◽  
Mehmet Gönen
Keyword(s):  
Zinc Oxide ◽  
Reaction Time ◽  
Boric Acid ◽  
Heterogeneous Reaction ◽  
Fire Retardant ◽  
Sem Analysis ◽  
Single Step ◽  
Hot Water ◽  
Zinc Borate ◽  
Novel Approach

Abstract Zinc borate having the formula of 4ZnO·B2O3·H2O has been used as a fire retardant for polymers requiring high processing temperatures since it has a high dehydration temperature (around 415°C). The effects of reaction time, reaction temperature were investigated on the heterogeneous reaction between solid zinc oxide and boric acid solution. A stoichiometric amount of zinc oxide and 5.0% excess boric acid were used in experiments and the other parameters, mixing speed (1700 rpm), the solid-liquid ratio of 20%, and the amount of seed crystal (3.9% wt) were kept constant for all experiments. A 91.1% conversion was obtained at 120°C for 5 h of reaction time. Precipitated product was filtered and washed by hot water to remove the excess boric acid. Finally it was dried until reaching to a constant mass in an air circulating oven at 105°C. Powder products were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). FTIR spectrum and XRD pattern of powders are consistent with data of the zinc borate given in the literature. According to SEM analysis, whiskers are less than 1 μm in diameter and their lengths are in the range of 1–10 μm.

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