Effect of the post-heat treatment on the properties of medium density particleboard of Eucalyptus sp.

Sabino, Ticyane Pereira Freire; Surdi, Paula Gabriella; Vilela, Alan Pereira; Metzker, Stefânia Lima Oliveira; Coelho, Nayane Pereira Freire; Oliveira, Tiago José Pires de; Mendes, Rafael Farinassi

doi:10.1590/2179-8087-floram-2020-0079

Cited by 3 publications

(3 citation statements)

References 39 publications

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“…The compounds added in the manufacture of panels, such as coating and adhesives, are also degraded in this temperature range. The chemical safety information sheet refers to melamine resin coating and paint of the MDF, and chemical components such as xylene, nitrocellulose, n-butyl acetate and glycol in MDP (medium-density particleboard) panels commonly used in furniture factories volatilize in the range of 300 • C, thus contributing to greater thermal degradation of residues from MDP panels in this temperature range [35]. Lignin has a high carbon content and strong bonds that unite its monomers, so it has high thermal resistance, being degraded between 225 and 900 • C [36], showing mass loss lower than that of cellulose, hemicelluloses and extractives [37,38].…”

Section: Discussionmentioning

confidence: 99%

Resistance of Untreated and Torrefied Medium-Density Fiberboard (MDF) Residues to Xylophage Fungi

Surdi

Castro

Lima

et al. 2023

Forests

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The manufacture of wood panels generates a large amount of waste. This material can be an option for renewable energy generation. However, long-term storage, exposure to moisture and contact of these panels with the soil facilitate colonization by xylophagous organisms. Torrefaction, a heat treatment between 200 and 300 °C in an oxygen-free atmosphere, is a process that decreases hygroscopicity while increasing carbon content, energy efficiency and resistance to fungal attack. This work aimed to evaluate the resistance of MDF panel residues. The MDF panels were produced using eucalyptus wood and bonded with thermosetting synthetic resin, under high temperature and pressure, torrefied at 300 °C for 20, 30 and 40 min and exposed to the xylophagous fungi of the white rot, Irpex lacteus (Fr.) Fr. (1828) and Trametes versicolor, and that of the brown rot, Postia placenta. After the 12-week evaluation period under fungal exposure, the mass loss of the samples attacked by T. versicolor and P. placenta was similar between treatments, except the MDF untreated, which had greater mass losses from the fungus Irpex lacteus. The torrefaction process increased the material resistance to deterioration by fungi, with an inverse correlation between the torrefaction period and the mass losses by fungal attack of the MDF panel residues.

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Section: Discussionmentioning

confidence: 99%

Resistance of Untreated and Torrefied Medium-Density Fiberboard (MDF) Residues to Xylophage Fungi

Surdi

Castro

Lima

et al. 2023

Forests

Self Cite

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“…It was pointed out that the influence of heat treatment temperature on mechanical strength was greater than that of time. The results of Sabino et al (2021) also pointed out that compared with heat treatment time, temperature has a greater impact on mechanical properties.…”

Section: Physical and Mechanical Propertiesmentioning

confidence: 92%

Research progress and prospects of wood high-temperature heat treatment technology

Cao

Cheng

Cai

2022

BioRes

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High temperature heat treatment is one of the main technologies with the highest market conversion rate and broad future prospects in the functional technology of wood. Chemical reagents are not added in the production process. The treatment improves the dimensional stability, biological durability, wood color, and acoustic properties without reducing the environmental performance of the product. However, there are some problems in heat treatment, such as the reduction of mechanical properties and surface wettability of wood, high production energy consumption, and large exhaust emissions. Therefore, understanding the influence and mechanism of high temperature heat treatment technology on wood properties is of guiding significance to further improve the quality of heat-treated wood, improve production process, and develop new equipment. This article reviews the effects of heat treatment on the properties of wood and the mechanism of heat treatment. Then, some applications of heat treatment of wood are introduced. Finally, the development direction and prospect of high temperature heat treatment technology in the future are forecasted.

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“…Thermal treatments decrease wood's hygroscopicity due to the degradation of the hemicelluloses that occurs more intensely than to other wood components due to their structural heterogeneity, presence of amorphous regions, and low molecular mass [11]. When properly carried out, the treatments also cause higher dimensional stability and resistance to decay [12,13]. The wood color is also altered, leaving it with darker and more uniform tones [14].…”

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Effect of thermal treatment on the physical properties of GG100 clone Eucalyptus wood

et al. 2022

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Thermal treatment can modify undesirable characteristics of some woods, dimensional instability, and excessive water adsorption. The present research work aimed to assess the effect of thermal treatment on the physical properties of clone GG100 Eucalyptus wood. Wood samples were obtained from 9 year-old trees. Samples were subjected to three types of thermal treatment (T1, T2, and T3). In T1, the wood was kept in a laboratory kiln at 100 °C for 180 min. In T2, hydrothermal treatment was performed in an autoclave at 120 °C for 120 min. In T3, the combined autoclave and laboratory kiln treatments were employed. The properties evaluated were apparent density (ρa); mass loss (ML); longitudinal (βl), radial (βr), tangential (βt), and volumetric shrinkage (βv); anisotropic factor; and equilibrium moisture content. The treatments caused a decrease of ρa and increase of ML. The Equilibrium Moisture Content (EMC) was lowest for T3, and had a negative correlation with ML, βt, and ∆v. The Pearson correlation analysis indicated the results of the thermal treatments were similar, but T1 presented the lowest variation of the physical properties compared to the other treatments, giving it the best predictability for practical uses.

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Effect of the post-heat treatment on the properties of medium density particleboard of Eucalyptus sp.

Cited by 3 publications

References 39 publications

Resistance of Untreated and Torrefied Medium-Density Fiberboard (MDF) Residues to Xylophage Fungi

Resistance of Untreated and Torrefied Medium-Density Fiberboard (MDF) Residues to Xylophage Fungi

Research progress and prospects of wood high-temperature heat treatment technology

Effect of thermal treatment on the physical properties of GG100 clone Eucalyptus wood

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