The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Yixing Liu - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Decay Resistance of wood and wood-polymer composite prepared by in-situ polymerization of monomers
International Biodeterioration & Biodegradation, 2013Co-Authors: Zhenbo Liu, Xiaoying Dong, Yixing LiuAbstract:Abstract Fast-growing plant wood Populus ussuriensis Kom, and Micheliamacclurel wood were respectively modified by formation of wood-polymer composite to improve their Decay Resistance. Two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood cell lumen under a vacuum-pressure condition, and then in-situ polymerized into copolymers through a catalyst-thermal treatment. The Decay Resistances of untreated wood and wood-polymer composites were assessed by weight loss and compared by SEM observations. SEM and FTIR analysis indicated that the in-situ polymerized copolymers fully filled up wood cell lumen and also grafted onto wood cell walls, resulting in the blockage of passages for microorganisms and moisture to wood cell walls. Thus, the Decay Resistance of poplar wood-polymer composite and Micheliamacclurel wood-polymer composite against brown rot fungus and white rot fungus in terms of weight loss achieved 3.43–3.92% and 1.04–1.33%, improved 95.06–95.18% and 95.10–95.35% than those of untreated poplar wood and Micheliamacclurel wood, respectively; and also respectively higher than that of boron-treated wood. The SEM observations for the Decayed poplar wood, Micheliamacclurel wood and their corresponding treated wood also showed the remarkable improvement of Decay Resistance of wood after such treatment, which effectively protected wood from degradation by fungi.
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Green Chemical Treatment of Natural Wood Material for Decay Resistance by 3-iodo-2-propynyl butyl carbamate (IPBC) with Supercritical CO2 as a Carrier Solvent
Advanced Materials Research, 2010Co-Authors: Peng Chen, Yixing Liu, Xiang Ming WangAbstract:In order to improve the Decay Resistance of wood as the renewable natural material of biological origin, an organic preservative, 3-iodo-2-propynyl butyl carbamate (IPBC), was penetrated into wood matrix by supercritical CO2 as a carrier solvent. And the effectiveness of penetrating IPBC into wood matrix through SC-CO2 was also examined in terms of preservative distribution, leachability Resistance of preservative as well as Decay Resistance of wood. The results indicate that the optimum penetration craft under the adopted conditions was pressure: 19MPa, temperature: 35°C, pressure time: 2.5h and time for releasing pressure: 20min. And under the optimum condition, the mechanical properties of SC-CO2 treated wood were not significantly affected. SEM-EDX analysis indicate that IPBC mainly distributed in wood matrix due to the higher penetration of supercritical CO2 as a carrier solvent, and its leachability was remarkably reduced after such penetration. The Decay Resistance of SC-CO2 treated wood against fungi attack was improved 90.96% over untreated wood, indicating effective Decay Resistance of wood after preservative penetration with SC-CO2.
Alexandre Florian Da Costa - One of the best experts on this subject based on the ideXlab platform.
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Properties after weathering and Decay Resistance of a thermally modified wood structural board
International Biodeterioration & Biodegradation, 2008Co-Authors: Cláudio Henrique Soares Del Menezzi, Raiana Quirino De Souza, Robert Morais Thompson, Divino Eterno Teixeira, Esmeralda Yoshico Arakaki Okino, Alexandre Florian Da CostaAbstract:This paper aims to evaluate whether a thermal post-treatment can be applied to enhance the performance of oriented strandboard (OSB). Samples from 42 commercial OSBs were heat-treated at two temperature levels (190 and 220 °C) and for three heating times (12, 16, and 20 min) using a single opening hot-press. For comparison, control boards were kept untreated. These samples were exposed for eight months to outdoor weathering, and then their physical and mechanical properties were evaluated, as was their Decay Resistance against the brown-rot (Gloeophyllum trabeum [Persoon ex Fries] Murrill) and white-rot (Trametes versicolor [Linnaeus ex Fries] Pilat Murrill) fungi. The results indicated that the heat-treated samples maintained their mechanical properties at a much higher level after weathering than did the untreated ones. It was determined that the higher the treatment temperature, the better the residual mechanical properties. The proposed thermal treatment also slightly improved the Decay Resistance against the two evaluated fungi, but it was not enough to change the Resistance class of the OSB.
Rezaur Rahman - One of the best experts on this subject based on the ideXlab platform.
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thermal and Decay Resistance properties of tropical wood plastic composites
Journal of Composite Materials, 2013Co-Authors: Saiful Islam, Sinin Hamdan, Habibur Rahman Sobuz, Rezaur Rahman, Abu Saleh AhmedAbstract:This investigation concerns about the thermal and Decay Resistance properties of tropical wood polymer composites. Wood polymer composites were prepared from several types of tropical wood species by impregnating the woods with ethyl methacrylate that was combined with a cross-linker, hexamethylene diisocyanate. Thermal properties of wood polymer composites in terms of thermogravimetric analysis and differential scanning calorimetry were evaluated, and an improvement in thermal stability was found on ethyl methacrylate and ethyl methacrylate–hexamethylene diisocyanate treatment. A significant improvement in Decay Resistance was also identified in wood polymer composites that were treated with ethyl methacrylate, and also, with ethyl methacrylate–hexamethylene diisocyanate. The improvement in properties was observed as more potential with ethyl methacrylate–hexamethylene diisocyanate combination rather than ethyl methacrylate.
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Thermal and Decay-Resistance properties of tropical wood–plastic composites
Journal of Composite Materials, 2012Co-Authors: Saiful Islam, Sinin Hamdan, Habibur Rahman Sobuz, Rezaur Rahman, Abu Saleh AhmedAbstract:This investigation concerns about the thermal and Decay Resistance properties of tropical wood polymer composites. Wood polymer composites were prepared from several types of tropical wood species by impregnating the woods with ethyl methacrylate that was combined with a cross-linker, hexamethylene diisocyanate. Thermal properties of wood polymer composites in terms of thermogravimetric analysis and differential scanning calorimetry were evaluated, and an improvement in thermal stability was found on ethyl methacrylate and ethyl methacrylate–hexamethylene diisocyanate treatment. A significant improvement in Decay Resistance was also identified in wood polymer composites that were treated with ethyl methacrylate, and also, with ethyl methacrylate–hexamethylene diisocyanate. The improvement in properties was observed as more potential with ethyl methacrylate–hexamethylene diisocyanate combination rather than ethyl methacrylate.
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Mechanical Properties and Decay Resistance of Wood Polymer Composites (WPC)
Advanced Materials Research, 2011Co-Authors: Rezaur Rahman, Sinin Hamdan, M. Saiful Islam, Shahjahan MondolAbstract:In Malaysia, especially Borneo Island Sarawak has a large scale of tropical wood species. In this study, selected raw tropical wood species namely Artocarpus Elasticus, Artocarpus Rigidus, Xylopia Spp, Koompassia Malaccensis and Eugenia Spp were chemically treated with sodium meta periodate to convert them into wood polymer composites. Manufactured wood polymer composites were characterized using mechanical testing (modulus of elasticity (MOE), modulus of rupture (MOR), static Young’s modulus) and Decay Resistance test. Modulus of elasticity and modulus of rupture were calculated using three point bending test. Static Young’s modulus and Decay Resistance were calculated using compression parallel to gain test and natural laboratory Decay test respectively. The manufactured wood polymer composites yielded higher modulus of elasticity, modulus of rupture and static Young’s modulus. Wood polymer composite had high resistant to Decay exposure, while Eugenia Spp wood polymer composite had highly resistant compared to the other ones.
Zhenbo Liu - One of the best experts on this subject based on the ideXlab platform.
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Comparison of Decay Resistance of wood and wood-polymer composite prepared by in-situ polymerization of monomers
International Biodeterioration & Biodegradation, 2013Co-Authors: Zhenbo Liu, Xiaoying Dong, Yixing LiuAbstract:Abstract Fast-growing plant wood Populus ussuriensis Kom, and Micheliamacclurel wood were respectively modified by formation of wood-polymer composite to improve their Decay Resistance. Two functional monomers, glycidyl methacrylate and ethylene glycol dimethacrylate, added with a few Azo-bis-isobutryonitrile as initiator, and maleic anhydride as catalyst, were first impregnated into wood cell lumen under a vacuum-pressure condition, and then in-situ polymerized into copolymers through a catalyst-thermal treatment. The Decay Resistances of untreated wood and wood-polymer composites were assessed by weight loss and compared by SEM observations. SEM and FTIR analysis indicated that the in-situ polymerized copolymers fully filled up wood cell lumen and also grafted onto wood cell walls, resulting in the blockage of passages for microorganisms and moisture to wood cell walls. Thus, the Decay Resistance of poplar wood-polymer composite and Micheliamacclurel wood-polymer composite against brown rot fungus and white rot fungus in terms of weight loss achieved 3.43–3.92% and 1.04–1.33%, improved 95.06–95.18% and 95.10–95.35% than those of untreated poplar wood and Micheliamacclurel wood, respectively; and also respectively higher than that of boron-treated wood. The SEM observations for the Decayed poplar wood, Micheliamacclurel wood and their corresponding treated wood also showed the remarkable improvement of Decay Resistance of wood after such treatment, which effectively protected wood from degradation by fungi.
Asghar Omidvar - One of the best experts on this subject based on the ideXlab platform.
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The effect of nano-zinc oxide on particleboard Decay Resistance
Maderas-ciencia Y Tecnologia, 2015Co-Authors: Pouya Marzbani, Younes Mohammadnia Afrouzi, Asghar OmidvarAbstract:The aim of this study was to investigate the Decay Resistance of particleboards treated with nano- zinc oxide against the white-rot fungus Trametes versicolor and the brown-rot species Coniophora puteana. The nanomaterial was used for manufacturing particleboards at 5, 10 and 15% wt based on the glue dry weight. The soil block Decay test was performed according to ASTM D 1413 (2007) using a 12 weeks incubation period. The results showed that all treated boards had good Resistance against the Decay fungi and the weight loss decreased in the samples with increasing nanomaterial loading. The threshold level of treated boards against fungal Decay was obtained about 21% and 17% nano-ZnO against C. puteana and T. versicolor, respectively. Therefore, it had a positive effect on increasing particleboard Resistance against the fungi. The maximum Decay Resistance (or minimum weight loss) occurred in the samples containing 15% zinc oxide nanoparticles.
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Effect of Nano-ZnO on Decay Resistance and Artificial Weathering of Wood Polymer Composite
Journal of Nanomaterials & Molecular Nanotechnology, 2014Co-Authors: Siroos Habibzade, Asghar Omidvar, Mohammad Reza Mastery Farahani, Mehdi MashkourAbstract:Effect of Nano-ZnO on Decay Resistance and Artificial Weathering of Wood Polymer Composite Wood polymer nanocomposite (WPNC) was prepared by impregnation of styrene and Nano zinc oxide into poplar wood (Populus deltoids Marsh.). WPNCs containing different loading of nano zinc oxide, namely 0, 0.5, 1 and 1.5 percent (by weight of monomer), were made. Then the effect of addition of nanoparticles on the Decay Resistance and artificial weathering were studied. The WPNCs were subsequently exposed to the artificial weathering test with duration of 200, 400 and 800 hours and Decay test according to a modified ASTM D1413 standard. The results showed that the amount of color change of samples treated with nano zinc oxide was less than untreated one, also the Decay Resistance of the composite against the fungi with increasing of concentration was improved.
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Effect of Nano-ZnO on Decay Resistance and Artificial Weathering of Wood Polymer
2014Co-Authors: Asghar Omidvar, Mehdi MashkourAbstract:Wood polymer nanocomposite (WPNC) was prepared by impregnation of styrene and Nano zinc oxide into poplar wood (Populus deltoids Marsh.). WPNCs containing different loading of nano zinc oxide, namely 0, 0.5, 1 and 1.5 percent (by weight of monomer), were made. Then the effect of addition of nanoparticles on the Decay Resistance and artificial weathering were studied. The WPNCs were subsequently exposed to the artificial weathering test with duration of 200, 400 and 800 hours and Decay test according to a modified ASTM D1413 standard. The results showed that the amount of color change of samples treated with nano zinc oxide was less than untreated one, also the Decay Resistance of the composite against the fungi with increasing of concentration was
