Influence of the wood quality and treatment temperature on the physical and mechanical properties of thermally modified radiata pine

Herrera-Díaz, René; Sepúlveda-Villarroel, Víctor; Torres-Mella, José; Salvo-Sepúlveda, Linette; Llano‐Ponte, Rodrigo; Salinas-Lira, Carlos; Peredo, Miguel A.; Ananías, Rubén A.

doi:10.1007/s00107-019-01424-9

Cited by 18 publications

(8 citation statements)

References 42 publications

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“…Observing the behavior of physical, chemical and mechanical properties, the coefficient of variation (CV) increases with elevation of thermal treatment temperature. Such performance is corroborated by literature [6,35,[44][45][46][47], which can be explained by a major degradation of wood constituents and wood hysteresis [31,46,48], increasing the inherent material variability after thermal modification.…”

Section: Resultssupporting

confidence: 75%

Propose of models to estimate toughness as a function of physical and chemical properties of commercial thermally modified hardwoods

Oliveira

Aquino

et al. 2022

Matéria (Rio J.)

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The present research intended to propose and evaluate regression models which estimate toughness property as a function of physical, chemical properties of thermally modified hardwood and thermal treatment temperature, using linear, quadratic, cubic, exponential, logarithmic, geometric and multiple linear models. Commercial thermally modified woods were used on the study, being characterized for all referred properties, totalizing 450 experimental determinations. The analyzed models presented a low and moderate coefficient of determination, indicating the impossibility to use such models in the estimation of toughness as a function of physical and chemical factors

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Section: Resultssupporting

confidence: 75%

Propose of models to estimate toughness as a function of physical and chemical properties of commercial thermally modified hardwoods

Oliveira

Aquino

et al. 2022

Matéria (Rio J.)

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“…The tests were realized in a flexible industrial prototype chamber with a capacity of 3.5 m 3 (Model Lab3.5e, Neumann, Concepcion, Chile) designed to withstand temperatures up to 250 °C. For each process, the chamber was loaded with 140 samples according to the schedules implemented by Herrera-Díaz et al (2019). The first phase of the modification process began with a fast increase to temperature to 100 °C.…”

Section: Thermal Modification Processmentioning

confidence: 99%

Microstructure of thermally modified radiata pine wood

Cabezas-Romero

Salvo-Sepúlveda

Contreras-Moraga

et al. 2020

BioRes

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The thermal modification of wood is a potential alternative method for improving wood dimensional stability and increasing the resistance of wood to decay. However, during thermal modification, morphological changes occur within the microstructure of the cell, and these confer different properties to the wood. This study investigated the effects of the thermal modification process on the microstructure of radiata pine juvenile wood. Therefore, anatomical measurements were performed via optical microscopy in selected earlywood and latewood samples after each treatment, and the results were compared to untreated wood samples. In this study, two temperatures (190 °C and 210 °C) were considered for the thermal modification process. The results showed that the level of temperature of modification affected to microstructure of cell wall. The cell wall thickness decreased as treatment temperature increased, whereas the average lumen diameter increased slightly as temperature increased. Thermally modified radiata pine showed signs of damage (cracks, broken cells and deformations in the wood cell wall). The proportion of destroyed area increased as temperature increased, and significant differences were evident for the thermal treatment at 210 °C.

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“…This can be explained due to the age of the trees when harvested, demanding further researches for more signifi cant results. The major variation of CV can be explained due to degradation of wood constituents and wood hysteresis (Calonego et al, 2012;Herrera-Díaz et al, 2019;Kačíková et al, 2013).…”

Section: Discussionmentioning

confidence: 99%

INFLUENCE OF COMMERCIAL THERMAL TREATMENT ON Eucalyptus grandis Hill ex Maiden WOOD PROPERTIES

Oliveira

Molina

et al. 2021

Rev. Árvore

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This study aimed to evaluate the influence of commercial thermal treatment on Eucalyptus grandis considering its physical, chemical, and mechanical properties. The wood samples were heat-treated in an autoclave with saturated steam and pressure application at four different temperatures: 155, 165, 175, and 185 ºC. The physical, chemical, and mechanical properties were altered due to the heat treatment. The extractives content varied between 6.06% and 28.75%; lignin between 28.93% and 37.96%; holocellulose between 65.01% and 38.12%. The mechanical properties reduced significantly with the increase of the heat treatment temperature. Through the set of data obtained, it was possible to generate significant and high precision regression models capable of estimating such properties for heat treatment temperatures not studied experimentally, enabling the determination of the most suitable temperature of heat treatment to achieve a certain property value of the treated wood.

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Influence of the wood quality and treatment temperature on the physical and mechanical properties of thermally modified radiata pine

Cited by 18 publications

References 42 publications

Propose of models to estimate toughness as a function of physical and chemical properties of commercial thermally modified hardwoods

Propose of models to estimate toughness as a function of physical and chemical properties of commercial thermally modified hardwoods

Microstructure of thermally modified radiata pine wood

INFLUENCE OF COMMERCIAL THERMAL TREATMENT ON Eucalyptus grandis Hill ex Maiden WOOD PROPERTIES

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