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

Kaymakçı, Alperen; Bayram, Bahadır Çağrı

doi:10.15376/biores.16.3.4693-4703

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…Generally, the criteria (tests) in this study are used to determine whether the wood material is suitable for the place of use. Kaymakci and Bayram [46] used the same criteria (tests) to measure the success of the heat treatment and to determine the optimum parameters.…”

Section: Resultsmentioning

confidence: 99%

Selection of materials with entropy-topsis by considering technological properties of impregnated wood

2022

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In this study, the hybrid Entropy-TOPSIS method is applied to the problem of selecting an optimal impregnation material with maximum performance requirements. Swelling, shrinkage, bending strength, modulus of elasticity, compressive strength and shock strength values were used to rank the impregnation materials. Barite, boric acid, borax and their mixture were used to impregnation material. The impregnation materials used in the study generally increased the physical and mechanical properties of the spruce specimens, except swelling. The impregnation materials reduced the swelling of the specimens. According to the entropy method, the most important factor affecting the success of the impregnation process was the modulus of elasticity. According to the TOPSIS method, the most successful impregnation material was a mixture of barite and boric acid. Moreover, the proposed method was compared with other Multi-Criteria Decision-Making (MCDM) approaches and it can be used to ranking of impregnation materials with reliable accuracy.

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Section: Resultsmentioning

confidence: 99%

Selection of materials with entropy-topsis by considering technological properties of impregnated wood

2022

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“…They noted that the dimensional stability of Japanese cedar wood improved as the temperature and treatment duration increased leads to decrease in shrinkage coefficient. Kol (2010) and Kaymakci (2021) has also reported that the values of volumetric shrinkage decreases in thermally modified Pine, Fir and Poplar wood, treated at 190, 212°C for 2 h and 210°C for 4 h.…”

Section: Shrinkage Coefficient Of Woodmentioning

confidence: 93%

Impact of Heat Treatment on Dimensional Stability of Salix tetrasperma Roxb. Wood

Shabir,

Dutt,

Kumar

et al. 2024

IJBSM

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The present investigation was carried out during the years October, 2021–September, 2022 in the Laboratory of the Department of Forest Products, Dr. Y S Parmar University of Horticulture and Forestry Nauni, Solan. Thermal modification was performed on the samples of Salix tetrasperma at various temperatures 60, 80, 100, 120, 140, 160 and 200°C for 2, 4 and 6h under stability oven, to asses its impact on wood dimensional stability. The data pertaining on maximum moisture content, swelling coefficient and shrinkage coefficient shows significant variation. The maximum moisture content at different temperature treatment, was recorded to be maximum (192.03%) in control and minimum (140.09%) at 200°C, whereas for durations the maximum moisture content (164.77%) was observed at 2 h while minimum (161.77%) at 6 h. Among interactions, the maximum value (192.03%) was observed in control and minimum (139.42%) was found at 200°C (6 h). In volumetric swelling and shrinkage coefficient, maximum values (8.03%) and (7.42%) among temperatures were found in control and minimum values (3.85%) and (3.42%) were observed at 200°C (6 h). Among durations, the highest values (5.94%) and (5.73%) were found at 2 h and the lowest values (5.60%) and (5.50%) were observed at 6h. The interactions in volumetric swelling coefficient showed significant results and the highest value (8.03%) was noticed in control and the lowest value (3.74%) at 200°C (6 h), However, interactions in volumetric shrinkage coefficient were found to be non-significant. This indicated that after thermal treatment, wood becomes less hygroscopic and exhibits less wear and tear, even in a harsh environment.

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“…For beech (Fagus orientalis Lipsky) wood thermally modified under atmospheric pressure in almost all modification variants (for temperatures of 150 • C, 175 • C, 200 • C and time of 1 h, 3 h, 5 h), the authors obtained an increase in the value of compressive strength contained between 2.98% and 19.3%. A slight decrease in compressive strength at the level of 1.16% was shown only in the case of beech wood modified at 200 • C for 5 h. Kaymakci and Bayram [48] obtained an increase in the CS for poplar wood (Populus alba L.) after modification at the temperatures of 120 • C, 150 • C, 180 • C for 2 h and 4 h under atmospheric pressure. The highest (i.e., 14%) increase in the CS value was obtained after the modification of poplar wood at a temperature of 120 • C for 2 h. However, the decrease in the CS value was recorded only for the highest modification temperature, i.e., 210 • C and the times of 2 h and 4 h, with the maximum decrease in CS at the level of 22% for 210 • C and 4 h. The decrease in compressive strength can be reduced by using a closed system with an inert gas such as nitrogen or steam [34].…”

Section: Modification Time (H)mentioning

confidence: 97%

Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (Populus nigra L.)

Bytner¹,

Drożdżek²,

Laskowska³

et al. 2022

Materials

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The thermal modification of wood in a nitrogen atmosphere shapes the functional properties of wood. The aim of this research was to determine the influence of different levels of temperature and the duration of thermal modification on the mechanical properties of the black poplar (Populus nigra L.). Black poplar was thermally modified in nitrogen atmosphere in the temperature range from 160 °C to 220 °C (6 levels) for 2 h to 8 h (4 levels), resulting in a total of 24 treatments. The effect of these treatments on compressive strength parallel to the grain (CS), modulus of rupture (MOR), and modulus of elasticity during bending (MOE) were analyzed. Thermal modification influenced the mechanical properties of black poplar wood. After thermal modification occurred in a nitrogen atmosphere, an increase in compressive strength was noticeable for all variants of black poplar wood modification. The highest 16% increase in CS was obtained for the modification carried out at the temperature of 160 °C and for 2 h. An increase was also found for MOE when modified under mild conditions, while a decrease occurred for variants at higher temperatures, i.e., for 200 °C and 220 °C. The study showed that for all modification variants, there was a decrease in MOR alongside the increase in modification temperature and time.

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

Cited by 7 publications

References 20 publications

Selection of materials with entropy-topsis by considering technological properties of impregnated wood

Selection of materials with entropy-topsis by considering technological properties of impregnated wood

Impact of Heat Treatment on Dimensional Stability of Salix tetrasperma Roxb. Wood

Influence of Thermal Modification in Nitrogen Atmosphere on the Selected Mechanical Properties of Black Poplar Wood (Populus nigra L.)

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