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

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

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.

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.

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

Effect of modifying agents on the hydrophobicity and yield of zinc borate synthesized by zinc oxide

2013 ◽  
Vol 20 (6) ◽  
pp. 574-581 ◽  
Author(s):  
Nil Baran Acarali ◽  
Melek Bardakci ◽  
Nurcan Tugrul ◽  
Emek Moroydor Derun ◽  
Sabriye Piskin
Keyword(s):  
Zinc Oxide ◽  
Zinc Borate

scholarly journals Wood/plastic ratio: Effect on performance of borate biocides against a brown rot fungus

Holzforschung ◽  
2004 ◽  
Vol 58 (2) ◽  
pp. 205-208 ◽  
Author(s):  
J. Simonsen ◽  
C. M. Freitag ◽  
A. Silva ◽  
J. J. Morrell
Keyword(s):  
Moisture Sorption ◽  
Brown Rot ◽  
Solid Wood ◽  
Zinc Borate ◽  
Wood Component ◽  
Weight Losses ◽  
Soil Block ◽  
Brown Rot Fungus ◽  
Plastic Ratio ◽  
Wood Content

Abstract The effect of wood/plastic ratio and the presence of a boron compound on resistance to biodegradation of wood plastic composites (WPC's) by the brown rot fungus Gloeophyllum trabeum was investigated in a soil block exposure. Weight losses of all WPC's were generally lower than those of solid wood, even when only the wood component of the WPC was used in calculating weight loss. Higher wood content was associated with greater weight losses, suggesting that the plastic encapsulated wood at lower wood levels. Borates markedly reduced weight losses at all wood/plastic ratios. Weight losses tended to be slightly lower with a Na/Ca borate than with similar levels of zinc borate. Mechanical properties did not correlate well with weight losses under the conditions evaluated, but these effects may have been masked by moisture sorption. The causes and implications of these differences are discussed.

scholarly journals Biological Resistance and Application Properties of Particleboards Containing Nano-Zinc Oxide

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Ladislav Reinprecht ◽  
Ján Iždinský ◽  
Zuzana Vidholdová
Keyword(s):  
Zinc Oxide ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Brown Rot ◽  
Strength Properties ◽  
Nano Zno ◽  
Biological Resistance ◽  
Weight Losses ◽  
Nano Zinc Oxide ◽  
Nano Zinc

Special particleboards (PBs) proposed for kitchens, bathrooms, hospitals, and some other specific products for interiors should have a sufficient resistance against bacteria, molds, and decaying fungi. This work deals about effects of zinc oxide nanoparticles (nano-ZnO) added into melamine-urea-formaldehyde (MUF) glue in the amounts of 0, 2, 6, 12, or 24% wt. on selected biological, moisture, and strength properties of laboratory-produced one-layer PBs. The nano-ZnO-treated PBs had a higher biological resistance: (1) against the Gram-positive bacterium Staphylococcus aureus by up to ca. 70% and the Gram-negative bacterium Escherichia coli by up to 50%, since their bacterial activities at using 1.0 McFarland bacterial inoculum decreased from 0.38–0.40 by up to 0.12–0.19  ×  108 CFU/ml; (2) against the molds Penicillium brevicompactum and Aspergillus niger by up to ca. 50–63%, since their growth intensities (0–4) on the top surfaces of treated PBs decreased according to a modified EN 15457 from 2.33–2.67 by up to 1.17–1.0; (3) against the brown-rot fungus Coniophora puteana by up to 85.7%, since their weight losses reduced according to a modified ENV 12038 from 17.4% by up to 2.5%. The presence of nano-ZnO in PBs uninfluenced their swelling, water absorption, and bending strength; however, it decreased their internal bond strength by up to 38.8%.

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