Thermally Compressed Poplar Wood (TCW): Physical and Mechanical Properties

Candan, Zeki; Korkut, Süleyman; Öner, Ünsal

doi:10.5552/drind.2013.1216

Cited by 18 publications

(11 citation statements)

References 11 publications

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“…Thermally compressing process significantly influenced the color parameters of pine wood materials (Atik et al 2013). Thermal modification method affects performance properties of the paulownia (Candan et al 2013a) and poplar (Candan et al 2013b) wood materials. Changes in microscopic characteristics because of thermally compressing procedure were examined by Dogu et al (2016) and Dogu et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Gönültaş

Candan

2018

Maderas, Cienc. tecnol.

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In this study, the change in the chemical properties of the thermally modified eucalyptus (Eucalyptus camaldulensis) wood boards were examined by wet chemical analysis and FTIR spectroscopy. The eucalyptus wood boards were modified with a laboratory type hot-press for four different groups at press pressures of 2 or 4 MPa and temperatures of 150°C or 180°C and compared to untreated control. After this, hot water, 1% NaOH, ethanol-cyclohexane, ethanol, and methanol-water solubility values were determined for the treated samples. In addition, the content of klason lignin, acid soluble lignin, holocellulose, and α-cellulose were investigated. The solubility values (except for the ethanol solubility) increased in the modified wood when compared to the untreated control. A decrease in the content of acid soluble lignin, holocellulose and α-cellulose was observed while the content of klason lignin in the modified wood was increased. According to the FTIR analysis results, significant changes were observed in the spectra of the modified samples. These findings were in agreement with the results of wet chemical analysis.

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Section: Introductionmentioning

confidence: 99%

Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Gönültaş

Candan

2018

Maderas, Cienc. tecnol.

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“…Therefore, in recent years there has been a rapid increase in the application of different modification methods to wood and wood materials in order to improve their properties. In particular, thermal, thermo-mechanical and thermo-hydro-mechanical treatments of wood have been widely studied and applied to improve its properties (Bekhta et al 2012;Candan et al 2013;Diouf et al 2011;Fang et al 2012;Kamke 2006;Korkut et al 2013;Kutnar and Š ernek 2007;Militz 2002;Navi and Girardet 2000;Navi and Sandberg 2012;Tarkow and Seborg 1968;Welzbacher et al 2008). This treatment alters both chemical and physical properties of wood.…”

Section: Introductionmentioning

confidence: 99%

Gloss of thermally densified alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.) wood veneers

et al. 2014

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Thermo-mechanical densification of wood is performed to improve physical and mechanical properties of wood. During this treatment aesthetic properties of wood, including gloss, also change. Therefore, the purpose of this study was to determine the effect of short-term thermo-mechanical (STTM) densification in different wood species (alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.)) on their gloss changes. Commercial wood veneers were densified in a hot plate press for 4 min at temperatures of 100, 150 and 200°C, pressures of 4, 8 and 12 MPa. Gloss was evaluated at 20°, 60°and 85°a ngles of incident light using PICO GLOSS 503. Gloss measurements showed an enhancement of aesthetic properties of densified wood. Findings of this study indicated that both densification temperature and pressure have a significant effect on wood gloss. Gloss values of densified wood increased with increasing densification temperature and pressure for all investigated species. Compared to nondensified wood, gloss (85°) values (across/along the grain) for alder, beech, birch and pine increased after treatment to 2109.1/2376.9, 1728.6/2311.1, 2787.5/3000, and 2591.7/ 1216.7 %, respectively. The greatest gloss values were recorded at 200°C and pressure of 12 MPa for all tested angles of incident light and for all densified wood samples. Gloss changes for birch were the highest, but the glossiest surface was observed for pine among all investigated species after wood densification.

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“…Thermo-mechanical modifi cation is a technique of wood densifi cation that combines heat treatment with mechanical compression. In the mentioned modifi cation, densifi cation occurs with buckling of cell walls, which reduces pore-volume (Kutnar et al, 2009;Candan et al, 2013). In order to ensure suitable properties of the modifi ed wood, modifi cation should occur at an ideal temperature, in which the amorphous polymers of wood (lignin and hemicelluloses) pass from the glassy state to the rubbery state (Akerholm and Salmén, 2004).…”

Section: Introduction 1 Uvodmentioning

confidence: 99%

Influence of Densification Temperature on Some Physical and Mechanical Properties of Pterocarya Fraxinifolia Wood

2018

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This study has been conducted to investigate the infl uence of temperature levels in the densifi cation process by hot-press methods on the physical and mechanical properties of false walnut wood (Pterocarya fraxinifolia). For this purpose, wood specimens from fi ve standing trees were compressed at different densifi cation temperatures (110, 140 and 170 °C). Then, the data of oven dry density, modulus of rupture, modulus of elasticity in bending and withdrawal strength of nail of compressed wood were analyzed by SPSS software. Analysis of variance (ANOVA) indicated that the densifi cation temperature had signifi cant effects on the physical and mechanical properties. The most suitable temperature level was 140 °C for a higher density, modulus of rupture, modulus of elasticity in bending, and withdrawal strength of nail in the densifi cation of false walnut wood. Increase of 27 % in the density, 80 % in the modulus of elasticity (MOE), 252 % in the modulus of rupture (MOR) and 215 % in the withdrawal strength of nail were obtained after densifi cation.

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Thermally Compressed Poplar Wood (TCW): Physical and Mechanical Properties

Cited by 18 publications

References 11 publications

Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Chemical characterization and ftir spectroscopy of thermally compressed eucalyptus wood panels

Gloss of thermally densified alder (Alnus glutinosa Goertn.), beech (Fagus sylvatica L.), birch (Betula verrucosa Ehrh.), and pine (Pinus sylvestris L.) wood veneers

Influence of Densification Temperature on Some Physical and Mechanical Properties of Pterocarya Fraxinifolia Wood

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