Effects of heat treatment on some characteristics of Scots pine (Pinus sylvestris L.) wood

Durmaz, Ekrem; Üçüncü, Tutku; Karamanoğlu, Mehmet; Kaymakçı, Alperen

doi:10.15376/biores.14.4.9531-9543

Cited by 20 publications

(15 citation statements)

References 8 publications

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“…Therefore, the density was reduced (Vital et al 1983). Regarding the change in wood density, similar results were reported by Durmaz et al (2019). He deems that the removal of volatile extracts and moisture in the wood will cause the decrease of density.…”

Section: Analysis Of the Influence Of Extractive On The Mechanical Properties Of Pine Woodsupporting

confidence: 77%

“…According to the research conclusions of Vital et al (1983) and Durmaz et al (2019), it can be known that the degradation of wood chemical components will lead to decrease of wood density. Surprisingly, the fillings materials (extractives and hemicellulose, etc.)…”

Section: Analysis Of the Influence Of Extractive On The Mechanical Properties Of Poplar Woodmentioning

confidence: 99%

“…In addition, the above reactions will lead to the dissolution of amorphous materials (hemicellulose and extractive, etc.). Therefore, the proportion of the amorphous area decreases, the acreage of crystalline area relatively increases, and the relative crystallinity increases (Table 3) (Durmaz et al 2019). The dissolution of internal components of wood (hemicellulose and extractives, etc.)…”

Section: Proposed Mechanism Of Wood Extraction Treatmentmentioning

confidence: 99%

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Effects of removal of extractives on the chemical composition and mechanical properties of wood

Zhao

Bao

et al. 2020

BioRes

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Poplar and pine wood were extracted with water, 1% NaOH (wt%) solution, and benzene:ethanol solution (V1 : V2, 2 : 1) to investigate the governing factors and mechanism by which extractives affect wood structure and mechanical properties. The structure, pore distribution, crystal structure, and mechanical properties of samples were analyzed by Fourier transform infrared spectroscopy (FTIR), adsorption of N2 gas, X-ray diffraction (XRD), and mechanical testing, respectively. The results demonstrated that cellulose, hemicellulose, and lignin were degraded to some extent in the course of the dissolution of the extractives. This degradation had a great influence on the structure and quantity of pores. The extraction treatment did not change the crystallization type of the wood, but it increased the crystallinity of the wood, and the length and width of the crystallization area changed. In addition, the mechanical properties of wood were changed when the content of the extractives was reduced.

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Section: Analysis Of the Influence Of Extractive On The Mechanical Properties Of Pine Woodsupporting

confidence: 77%

Section: Analysis Of the Influence Of Extractive On The Mechanical Properties Of Poplar Woodmentioning

confidence: 99%

Section: Proposed Mechanism Of Wood Extraction Treatmentmentioning

confidence: 99%

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Effects of removal of extractives on the chemical composition and mechanical properties of wood

Zhao

Bao

et al. 2020

BioRes

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“…In the study by Sahin Kol et al (2009) it was stated that the decrease in EMC values due to the decrease of total hydroxyl groups and the decrease of free hydroxyl groups related to chemical change after heat treatment. Durmaz et al (2019) measured the changes in the physical properties of the heat treated wood whereby the density and EMC declined with increase treatment conditions. In a similar study, Bal (2015) reported that after heat treatment, the density and EMC values of wood decreased.…”

Section: Resultsmentioning

confidence: 99%

Effects of heat treatment on surface roughness and bonding strength of wood material

Perçin

2022

Mobilya Ve Ahşap Malzeme Araştırmaları Dergisi

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The purpose of this paper is to determine the effects of heat treatment on some properties of black pine (Pinus nigra A.) and larex (Larix decidua), woods. For this purpose, test samples were heat treated at 140, 160, 180 and 200°C for 2 and 5 hours. The air-dried density, equilibrium moisture content (EMC), surface roughness and bonding strengths of the test samples were analyzed. The average surface roughness parameter (Ra) was analyzed parallel to the grains. The results indicated significant differences depending on the wood species, heat treatment temperatures and treatment times. Based on the findings in this study, all parameters decreased depending on the heat treatment conditions. The density and EMC values of the control specimens were higher than the heat-treated samples. Also the surface roughness values obtained in black pine samples were higher than larex samples. On the other hand, bonding strength values obtained in larex samples were significantly higher than that of black pine samples. These parameters should be taken into account in the application areas of heat-treated wood material, the usage amount of which is constantly evolving in the woodworking industry.

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“…This method improves wood properties without addition of any chemical substance. Within the scope of thermal modification, many types of wood, different temperatures, heating rate and durations have been studied to determine the optimum process conditions (Syrjänen and Kangas 2000;Zaman et al 2000;Militz 2002;Mazela et al 2003;Esteves et al 2007;Kesik et al 2017;Durmaz et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of heat treatment parameters’ effect on some physical and mechanical properties of poplar wood with multi-criteria decision making techniques

Kaymakçı

Bayram

2021

BioRes

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Effects of the heat treatment parameters were evaluated relative to some physical and mechanical properties of poplar wood (Populus alba L.) with use of two of the prominent multi criteria decision-making (MCDM) techniques: Entropy and The Technique for Order Preference by Similarity to Ideal Solution (TOPSIS). To meet this objective, the test samples were heat-treated at 120, 150, 180, and 210 °C for 2 and 4 h in a laboratory-scale oven. With increasing temperature and duration, the shrinkage and swelling ratios of heat-treated samples were improved. However, the bending strength, modulus of elasticity, and compression strength generally decreased with increasing process temperature and duration. According to (MCDM) analyses, thermal modification definitely improved the physical properties of wood up to a point. Bending strength was found to be the most important determinant of heat treatment success. The other determinants were identified as swelling, compression strength, shrinkage, and modulus of elasticity, respectively. Also, the best results were obtained at 120 °C for 2 h. In general, heat treatment above 150 °C or 4 h is not recommended.

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Effects of heat treatment on some characteristics of Scots pine (Pinus sylvestris L.) wood

Cited by 20 publications

References 8 publications

Effects of removal of extractives on the chemical composition and mechanical properties of wood

Effects of removal of extractives on the chemical composition and mechanical properties of wood

Effects of heat treatment on surface roughness and bonding strength of wood material

Evaluation of heat treatment parameters’ effect on some physical and mechanical properties of poplar wood with multi-criteria decision making techniques

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