Yayınlar (Eski)

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12597/3200

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Browsing by Author "Ateş, Saim"

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    Effect of Heat Treatment on Equilibrium Moisture Content (EMC) of Some Wood Species in Turkey
    (Research Journal of Agriculture and Biological Sciences, 2008) Akyıldız, Mehmet Hakan; Ateş, Saim
    Heat treatment is often used for improve the dimensional stability of wood. In this study, effect of heat treatment on equilibrium moisture content (EMC) of oak (Quercus petraea Lieb.), chestnut (Castanea sativa Mill.), calabrian pine (Pinus brutia Ten.) and black pine (Pinus nigra Arnold.) woods, obtained from Kastamonu Forest Enterprises of Turkey, was examined. Wood specimens were subjected to heat treatment under atmospheric pressure and presence of air at three different temperature (130, 180 and 230 C) and two different time (2 and 8 h). The EMC of heat treated wood and control o samples were tested. The results showed that values of EMC decreased with increasing temperature and time of heat treatment. According to this result, oak, chestnut, calabrian pine and black pine woods could be utilized by using proper heat treatment techniques in outdoors and indoors applications for several purposes such as musical instruments, kitchen furniture, garden furniture and windows frames.
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    Effects of Heat Treament on Calabrian Pine (Pinus Brutia Ten.)Wood.
    (BioResources, 2009) Ateş, Saim; Akyıldız, Mehmet Hakan; Özdemir, Hasan
    In this study, the effects of heat treatment on some physical, mechanical , chemical proporties,and cellulose crystanility of calabrian pine (Pinus brutia ten) were evaluated.
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    Technological And Chemical Properties Of Chestnut (Castanea Sativa Mill.) Wood After Heat Treatment
    (Romanian Biotechnological Letters Vol. 15, No.1,4949-4958 (2010, 2010) Ateş, Saim; Akyıldız, Mehmet Hakan; Özdemir, Hasan; Gümüşkaya, Esat
    This study was performed to determine the effects of heat treatment on air-dry density (Dm), oven-dry density (D0), shrinkage (β), swelling (α), fiber saturation point (FSP), compression strength parallel to grain (σc//), bending strength (σb), modulus of elasticity (MOE) in bending, brinell-hardness (HB), equilibrium moisture content (EMC), chemical content and cellulose crystallinity of chestnut (Castanea sativa Mill.) wood. Wood samples were treated to heat at three different temperature (130, 180 and 230oC) and two different time level (2 and 8 h) under atmospheric pressure and presence of air. Dm, D0, β, α, FSP, EMC, σc//, σb and MOE were decreased by heat treatment. Lignin content, 1% NaOH and alcohol solubility values increased with depend on the heating temperature and time. Cellulose crystallinity of the samples was not changed significantly. Consequently, for heat treatment process, 130oC for 2 h should be applied in place where mechanical properties are important. However, 230oC for 2 h should be used in place where preferred physical properties. Heat-treated chestnut woods could be utilized by using proper heat treatment techniques in outdoors and indoors applications for several purposes such as musical instruments, kitchen furniture, garden furniture and windows frames
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    Technological and chemical properties of heat-treated Anatolian black pine wood
    (African Journal of Biotechnology, 2009-04-17) Akyıldız, Mehmet Hakan; Ateş, Saim; Özdemir, Hasan
    In this study the effect of heat treatment on air-dry density (Dm), oven-dry density (D0), shrinkage ( ), swelling (), fiber saturation point (FSP), compression strength parallel to grain (c//), bending strength (b), modulus of elasticity (MOE) in bending, Brinell-hardness (HB), equilibrium moisture content (EMC), chemical content and cellulose crystallinity of Anatolian black pine [Pinus nigra J.F. Arnold subsp. nigra var. caramenica (Loudon) Rehder] was evaluated. Specimens were subjected to heat under atmospheric pressure at 3 different temperature (130, 180 and 230°C) and 2 different time levels (2 and 8 h). The value of Dm, D0, , , FSP, EMC, c// , b, MOE, holocellulose, 1% NaOH and alcohol solubility decreased, whereas, lignin content increased depending on the heating temperature and the time. Cellulose crystallinity of the specimens was not changed significantly. 130°C showed minimum effect, on the other hand, 230°C showed maximum effect on all properties of treated wood. Accordingly, for heat treatment process, 130°C for 2 h should be applied in place where mechanical properties are important. However, 230°C for 2 h should be used in place where a physical property is preferred. Consequently, heat treated Anatolian black pine woods could be utilized in applications for several purposes such as kitchen furniture, outdoor furniture and windows frames.