Yazar "Birtürk, Turgay" seçeneğine göre listele
Listeleniyor 1 - 4 / 4
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Chemical, Hygroscopic, and Mechanical Properties of Various Wood Species Heat Treated via the ThermoWood (R) Method(North Carolina State Univ Dept Wood & Paper Sci, 2022) Aytin, Ayhan; Çakıcıer, Nevzat; Birtürk, TurgayFourier-transform infrared spectroscopy (FTIR), energy dissipation spectrometry, dimensional stability, and compressive strength tests were conducted parallel to the fibers on various heat-treated trees, i.e., narrow-leaved ash (Fraxinus angustifolia Vahl), aspen (Populus tremula L.), Oriental spruce (Picea orientalis (L.) Link.), and Uludag. fir (Abies bommaelleriana Mattf.), which grow naturally in forests in Turkey. Panels made from these trees were first heat treated via the ThermoWood (R) method, producing ThermoWood (R) panels. Then, FTIR, as well as energy dissipation spectrometry analysis, dimensional stability, and compressive strength tests were performed on test samples prepared from the panels. The FTIR data showed that the hemicelluloses were degraded in the ThermoWood (R) test samples and the proportion of cellulose increased. The energy dissipation spectrometry results showed that the amount of carbon increased, the amount of oxygen decreased, while the amount of hydrogen remained approximately the same in the ThermoWood (R) panels compared to the control samples. It was determined that the proportion of silicon increased in the narrow-leaved ash panels. In addition, among the physical properties, the amount of shrinkage and swelling decreased in all the tested ThermoWood (R) panels compared to the control samples, whereas the compressive strength values, which are considered a mechanical property, increased.Öğe Chemical, Hygroscopic, and Mechanical Properties of Various Wood Species Heat Treated via the ThermoWood® Method(North Carolina State University, 2022) Aytin, Ayhan; Çakıcıer, Nevzat; Birtürk, TurgayFourier-transform infrared spectroscopy (FTIR), energy dissipation spectrometry, dimensional stability, and compressive strength tests were conducted parallel to the fibers on various heat-treated trees, i.e., narrow-leaved ash (Fraxinus angustifolia Vahl), aspen (Populus tremula L.), Oriental spruce (Picea orientalis (L.) Link.), and Uludağ fir (Abies bornmüelleriana Mattf.), which grow naturally in forests in Turkey. Panels made from these trees were first heat treated via the ThermoWood® method, producing ThermoWood® panels. Then, FTIR, as well as energy dissipation spectrometry analysis, dimensional stability, and compressive strength tests were performed on test samples prepared from the panels. The FTIR data showed that the hemicelluloses were degraded in the ThermoWood® test samples and the proportion of cellulose increased. The energy dissipation spectrometry results showed that the amount of carbon increased, the amount of oxygen decreased, while the amount of hydrogen remained approximately the same in the ThermoWood® panels compared to the control samples. It was determined that the proportion of silicon increased in the narrow-leaved ash panels. In addition, among the physical properties, the amount of shrinkage and swelling decreased in all the tested ThermoWood® panels compared to the control samples, whereas the compressive strength values, which are considered a mechanical property, increased. © 2022, North Carolina State University. All rights reserved.Öğe Determination of wood characteristics of Pinus brutia Ten. infested with Marchalina hellenica Genn.(Taylor & Francis Ltd, 2022) Arslan, Mustafa Burak; Avci, Erkan; Tozluoğlu, Ayhan; Birtürk, Turgay; Saracbasi, Akin; Özcankaya, İ. Meltem; Koçer, NihanThe aim of this study was to examine the chemical, anatomical, physical, and mechanical properties of Marchalina hellenica Genn.-infested Pinus brutia Ten. wood. Studies were carried out on wood samples taken from uninfested trees, those with low M. hellenica infestation, and those with high infestation. In the P. brutia wood heavily infested with M. hellenica, statistically significant decreases were found in the holocellulose and alpha-cellulose ratios, the tracheid number in latewood, the growth ring width in earlywood and latewood, and the density and strength values. However, the density arid strength values of the P. brutia wood samples that were not infested and those with low M. hellenica infestation did not statistically differ from one another.Öğe Effects of anatomical and chemical properties of wood on the quality of particleboard(Elsevier Sci Ltd, 2013) Baharoğlu, Mehmet; Nemli, Gökay; Sarı, Bünyamin; Birtürk, Turgay; Bardak, SelahattinThe objective of this study was to investigate the effects of anatomical and chemical structures of wood on the quality properties of particleboard containing different mixture of wood species. Urea-formaldehyde adhesive was used as a binder for manufacturing of test panels. Anatomical and chemical properties of wood species, and physical and mechanical properties particleboards were evaluated. The anatomical and chemical structures were found to be effective on the all of the properties of particleboards. Panels made from the particles including more amount of pine wood had highest mechanical strength properties and lowest thickness swelling values. Cellulose, hemicellulose and lignin contents, acidity and solubility values (in hot-cold water, dilute alkali and alcohol benzene) of wood significantly affected all of the properties of particleboards. The physical and mechanical properties of particleboards showed statistically differences related to the length, thickness and number of the cells and fibers. (C) 2013 Elsevier Ltd. All rights reserved.
