The effects of heat treatment on physical and technological properties and surface roughness of Camiyanı Black Pine (Pinus nigra Arn. subsp. pallasiana var. pallasiana) wood

Gündüz, Gökhan; Korkut, Süleyman; Korkut, Derya Sevim

doi:10.1016/j.biortech.2007.05.015

Cited by 111 publications

(50 citation statements)

References 4 publications

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“…These results presented similar behaviour of other studies (Gündüz et al 2008, Korkut andGuller 2008) and confirmed the increase of quality of wood surface. According to Gündüz et al (2008), decrease of roughness is important for many applications of solid wood because can reduce the losses in planning machine and can increase the quality of wood surface.…”

Section: Resultssupporting

confidence: 91%

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The effect of thermal treatment on physical and mechanical properties of Luehea divaricata hardwood

Schneid

Cademartori

Gatto

2014

Maderas, Cienc. tecnol.

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This study aimed to characterise the effect of thermal treatment on physical and mechanical properties of açoita-cavalo (Luehea divaricata) wood. To achieve this, samples were treated at 160, 180 and 200°C for 2 h in an oven (dry conditions). Physical and mechanical characterisation was performed by weight loss, dry specific gravity at 12%, equilibrium moisture content, volumetric swelling and shrinkage, water absorption, water repellence, static bending and brittleness tests. Roughness and colour tests were performed in order to evaluate the modified surface. Main findings showed that dimensional stability of thermally modified wood increased, while mechanical strength of wood decreased as a function of temperature. A darkening of wood and a decrease in roughness were observed.

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Section: Resultssupporting

confidence: 91%

“…According to Gündüz et al (2008), decrease of roughness is important for many applications of solid wood because can reduce the losses in planning machine and can increase the quality of wood surface.…”

Section: Resultsmentioning

confidence: 99%

The effect of thermal treatment on physical and mechanical properties of Luehea divaricata hardwood

Schneid

Cademartori

Gatto

2014

Maderas, Cienc. tecnol.

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“…However, the HD of specimens exposed to a temperature of 220 °C was 11.16% lower than that of samples treated at 200 °C within the same treating time of 2 h. Salca and Hiziroglu (2014) reported that the surface hardness value of red oak decreased by approximately 8.38% to 14.7% as a consequence of heating between 120 and 190 °C for 6 h, showing greater wood surface deterioration when exposed to a higher temperature (approximately 200 °C) for the same amount of time. Gündüz et al (2008) studied the effect of heat treatment on compression strength and surface hardness of hornbeam (Carpinus betulus L.) wood, and the results showed that both compression strength and hardness decreased with increasing temperature. The hardness values in the tangential, radial, and longitudinal directions decreased by approximately 55%, 54%, and 38%, respectively, when treated at 210 °C for 12 h, with a density loss of 16.12%.…”

Section: Effects Of Temperature On Surface Brittlenessmentioning

confidence: 99%

Surface Characteristics of Poplar Wood with High-Temperature Heat Treatment: Wettability and Surface Brittleness

et al. 2016

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The many uses of wood are greatly affected by its surface properties, which are significantly altered by heat treatment. Investigated here are the wettability and surface brittleness when treating poplar wood with heat at 160, 180, 200, and 220 °C for 2 h. Contact angles were measured by the sessile drop method, and surface free energy was calculated. Surface brittleness was expressed by hardness (HD value), roughness (Ra, Rq, Ry, and Rz values), and abrasive resistance (K value). Next, non-destructive Fourier transform near-infrared spectroscopic (FT-NIR) and X-ray photoelectron spectroscopic (XPS) measurements were employed to analyze the surface chemical changes. Scanning electron microscopy (SEM) revealed the post-heating microscopic structure. The results demonstrated that heat treatment reduces the surface wettability while increasing the surface brittleness, which becomes more apparent with increased temperature. Significant differences were determined (p < 0.05) between the surface parameters at four different temperatures. The degradation of cell wall components and the deterioration of microstructures was further expounded by FT-NIR, XPS, and SEM analyses. Furthermore, the abrasive resistance and hardness values decreased in line with the rate of weight loss (WL, %) and temperature. This indicates a strong correlation between the surface characteristics and the WL or temperature. The intensity of heat treatment appears to be predictable and easy to regulate.

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“…The results are that the mechanical properties of the wood decrease, and dimensional stability and biological resistance of the wood increase (Tjeerdsma et al 1998, Jamsa and Vitainemi 2001, Yildiz 2002, Petrissans et al 2003, Gündüz et al 2008, Can et al 2010.…”

Section: Introductionmentioning

confidence: 99%

Comparative biological resistance of differently thermal modified wood species against decay fungi, Reticulitermes grassei and Hylotrupes bajulus

Sivrikaya

Can

Troya³

et al. 2015

Maderas, Cienc. tecnol.

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Thermal modified wood has some advantages over natural wood, including decreased hygroscopicity, increased dimensional stability, and enhanced durability. In this study, European species of Scots pine (Pinus sylvestris), spruce (Picea orientalis), ash (Fraxinus spp.), and tropical species of tali (Erythrophleum ivorense), and iroko (Chlorophora excelsa) were thermally treated at 180 °C and 210 °C for 1,5 and 2 h, respectively. We evaluated the resistances of the untreated and thermally treated samples to decay induced by the white rot fungus, Trametes versicolor and two brown rot fungi, Coniophora puteana and Postia placenta. In addition, the samples were exposed to the termite Reticulitermes grassei and the longhorn beetle species Hylotrupes bajulus to evaluate their resistance to damage by the insects. During the heat treatment, the mass loss of the samples generally was between 9 and 14%. After the heat treatment, experiments were conducted to determine the effects of white and brown rot fungi on samples of Scots pine and tali, the effect of C. puteana on spruce, and the effects of C. puteana and P. placenta on ash and iroko. In all experiments, the mass loss due to damage from the various fungi was less than 1% for the samples that had been heat treated at 210 °C. The untreated and heat-treated tropical species exhibited higher durability with very low mass loss and 100% mortality of the insects when attacked by termites, whereas the other wood species had moderate attack. In addition, Hylotrupes bajulus exposure by two standart methods (EN 46 and 47) resulted in similar performances in most cases, although EN 47 treated samples at 210 °C showed improved durability for Scots pine (Pinus sylvestris) and spruce (Picea orientalis).

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The effects of heat treatment on physical and technological properties and surface roughness of Camiyanı Black Pine (Pinus nigra Arn. subsp. pallasiana var. pallasiana) wood

Cited by 111 publications

References 4 publications

The effect of thermal treatment on physical and mechanical properties of Luehea divaricata hardwood

The effect of thermal treatment on physical and mechanical properties of Luehea divaricata hardwood

Surface Characteristics of Poplar Wood with High-Temperature Heat Treatment: Wettability and Surface Brittleness

Comparative biological resistance of differently thermal modified wood species against decay fungi, Reticulitermes grassei and Hylotrupes bajulus

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