Technological properties of wood from small diameter in an area of forest exploitation of reduced impact in the Tropical Forest

Nascimento, Cristiano Souza do; Cruz, Irineide de Almeida; Nascimento, Claudete Catanhede do; Araújo, Roberto Daniel de; Higuchi, Níro; Santos, Joaquim dos

doi:10.1007/s10342-023-01588-3

Cited by 3 publications

(5 citation statements)

References 29 publications

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“…In many technological studies on wood, the chemical composition is often overlooked, despite its various correlations with the physic-mechanical characteristics of wood. These correlations have significant implications for industrial processes, including effects on moisture content [3,4,23]. The chemical and physical-mechanical properties results are shown below for a complete evaluation of the wood species.…”

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

“…Table 2 shows the results of the physics-mechanical determinations for the studied woods. The apparent density (AD) values exhibited a range from 0.76 (B. crispa) to 1.18 g/cm 3 (M. scleroxylon), while the basic density (WD) varied from 0.43 (B. crispa) to 0.98 g/cm 3 . Importantly, these values fall within the anticipated range for tropical wood [2,12].…”

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

“…In general, the results of the determination of AD are greater; this behavior occurs due to the measurement of the mass of the sample obtained in ambient humidity, and at WD, the mass is anhydrous. Ruffinatto et al (2015) [24] proposed a new classification of hardwood density: low density < 0.40, medium density 0.40-0.75, and high density > 0.75 g/cm 3 . Except for M. scleroxylon and D. excelsa, the other species were classified as medium density, where this attribute is ideal for indicating wood for the manufacture of panels [10,21].…”

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

“…Understanding the physics-mechanical properties of wood facilitates a more informed and efficient utilization of this resource. In studies focusing on wood quality, basic density (WD) is intricately linked to mechanical resistance, positioning it as a reliable predictor of both wood strength and stiffness [3,18]. Pearson's analysis was used to evaluate the relationship between drying results and the technological properties determined to understand possible correlations (Figure 4).…”

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

“…Beyond its utilitarian aspects, wood boasts attractive aesthetics, featuring a spectrum of colors and textures. This combination of attributes aroused significant newsworthy in the international market, leading to an increase in studies in the area of wood technology [3,4]. The drying process is a fundamental step in technological research, given its influence on the production and finished product.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of conventional and microwave drying of tropical Amazonian wood indicated for the manufacture of EGP (Edge Glued Panels)

Araújo,

Nascimento,

Nascimento

et al. 2024

Sci. Plena

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Wood drying is an important process in the forestry industry since the quality of manufactured products is directly related to the moisture content of the raw material. In the Amazon region, the complexity of the drying process is accentuated by the vast diversity of species, each with distinct technological profiles. This study focused on the evaluation of oven and microwave drying of five species of tropical Amazonian wood: Angelim-pedra (Hymenolobium pulcherrimum), Angelim-vermelho (Dinizia excelsa), Breu-vermelho (Protium puncticulatum), Murici (Byrsonima crispa) and Piaozinho (Micrandropsis scleroxylon), recommended for the production of laterally glued panels (EGP). Samples of these species were collected in areas of terra-firme forest in Amazonas, Brazil, and subjected to oven-dry for 25 days and in semi-industrial microwaves for 120 minutes (100 ± 3 °C). Additionally, analyses of the wood properties were carried out. The results indicate that microwave drying surpassed the efficiency of oven-dry. Specifically, Breu-vermelho and Murici wood presented the best results in terms of moisture content. This drying method not only significantly reduced the drying time but also resulted in defect-free wood. Furthermore, the energy consumption was lower compared to conventional drying. The physical-mechanical properties of wood showed a significant correlation with heat-treatment. In particular, microwave drying proved to be effective in obtaining standard moisture for manufacturing EGP panels and could be an advantageous alternative for the region.

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Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

Section: Chemical and Physical-mechanical Properties Of Amazonian Woodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Evaluation of conventional and microwave drying of tropical Amazonian wood indicated for the manufacture of EGP (Edge Glued Panels)

Araújo,

Nascimento,

Nascimento

et al. 2024

Sci. Plena

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A rapid and nondestructive method for the prediction of lignin content in tropical Amazon woods using FT-NIR spectroscopy

Nascimento,

Cruz,

Araújo

et al. 2024

J Indian Acad Wood Sci

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Impact of thermal treatment on the properties of assacú (Hura crepitans L.) and murici (Byrsonima crispa A.Juss.) Amazon woods

Leite,

Do Nascimento,

De Almeida Cruz

et al. 2024

NZJFS

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Background: White and low-density Amazon woods, such as assacú (Hura crepitans L.) and murici (Byrsonima crispa A.Juss.), have restricted use, given their low physical-mechanical strength and low natural durability. Physicochemical changes caused by heat treatment can improve different quality traits of these woods, such as changing the visual appearance from white to brown tones, improving dimensional stability, moisture control, and resistance to attack from biological organisms. Methods: Assacú and murici wood samples were heat treated (180 and 220°C) for 60 minutes in a muffle kiln. The physical (moisture, mass loss, density, shrinkage, swelling), mechanical (dynamic modulus of elasticity), and chemical (extractives, solubility in hot water, lignin, and holocellulose) properties were evaluated following treatment and compared with those measured before treatment. Results: The heat treatments T2 (180°C) and T3 (220°C) reduced the moisture content; however, the T3 treatment caused a more intense mass loss. For murici wood, this mass loss was 14%. The anisotropy coefficient was reduced for assacú wood by 1.30 and 1.03% for the T2 and T3 treatments, respectively, improving the dimensional stability of this wood. The density and modulus of elasticity were affected by the treatment, thus reducing the strength of the wood. The extractive content of the woods increased by 4.99 and 7.49% for sampled of assacú and murici, respectively, that were treated at 220°C. For the primary metabolites, holocellulose and lignin, degradation of these compounds occurred due to the decrease in their concentrations. The linear analysis of the studied variables indicated a high correlation between the physical properties and the chemical components of the woods (e.g., anisotropy coefficient x lignin and holocellulose x apparent density, r > 0.95). Conclusions: The heat treatment of Amazon woods directly influenced their physical-mechanical and chemical properties. In general, the higher temperature treatment caused the greatest changes in the studied species, and the exposure to heat caused noticeable changes in their colour. Heat treatment is a useful process for the forestry sector since heat-treated wood can be used to manufacture high-value-added products, such as fine furniture, residential floors, musical instruments, and non-structural components.

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Technological properties of wood from small diameter in an area of forest exploitation of reduced impact in the Tropical Forest

Cited by 3 publications

References 29 publications

Evaluation of conventional and microwave drying of tropical Amazonian wood indicated for the manufacture of EGP (Edge Glued Panels)

Evaluation of conventional and microwave drying of tropical Amazonian wood indicated for the manufacture of EGP (Edge Glued Panels)

A rapid and nondestructive method for the prediction of lignin content in tropical Amazon woods using FT-NIR spectroscopy

Impact of thermal treatment on the properties of assacú (Hura crepitans L.) and murici (Byrsonima crispa A.Juss.) Amazon woods

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