Potencial de uso de espécies de pinus tropicais para produção de painéis cimento-madeira

Iwakiri, Setsuo; Trianoski, Rosilani; Fonte, Ana Paula Namikata da; Cezimbra, Débora Jordão; Fomin, Igor Mottinha; Molleken, Richard

doi:10.18671/scifor.v45n113.15

Cited by 2 publications

(1 citation statement)

References 2 publications

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“…According to Iwakiri et al, (2017), Mendes et al, (2011) and Protásio et al, (2015), the potential for the production of these panels, especially particleboard, is associated with the fact that they present some advantages, such as reducing the heterogeneity of wood or residual lignocellulosic biomass, making the material produced more homogeneous in its characteristics, and adding value to materials with low acceptance. However, although reconstituted wood panels allow for the possibility of using less acceptable materials in their manufacture, in Brazil pine and eucalyptus are still the main raw materials used in their production (Guimarães et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Menali,

Zidanes,

Dias

et al. 2024

CERNE

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Background:The macauba (Acrocomia aculeata (Jacq.) Lodd. ex Mart.) is a palm tree native to tropical regions and occurs in much of the Brazilian territory. Current studies are focused on the extraction and exploitation of vegetable oil from this fruit. However, there are few studies on the residue, the endocarp, which represents approximately 25% of the total mass of the fruit. Studies that search for solutions for using residue, thus adding value, and generating environmentally friendly products, are of fundamental importance. Thus, this research aimed to evaluate the physical and mechanical properties of reconstituted wood panels produced with different proportions of macauba endocarp particles to replace pine wood particles, in addition to characterize the physical and chemical properties of macauba endocarp. The chemical characterization tests were performed according to applicable standards. The basic density was determined according to the NBR 11941 standard. Thermogravimetric analysis (TGA), X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR) were also performed. The particleboards panels were produced with a nominal density of 0.70g/cm³ and dimensions of 25x25x1.5cm. Five different treatments were evaluated with variations in the proportion of macauba endocarp particles in the core of the panel. For particle agglutination, phenol-formaldehyde adhesive was used at a proportion of 9% for the core and 12% for the faces, based on the dry mass of each panel. Scanning electron microscopy (SEM) was used to analyze the panel surfaces.Results:The endocarp of Acrocomia aculeata has low extractive content, high lignin content and high densification, 1.23g/cm³, when compared to Pinus oocarpa wood, 0.43g/cm³. All panels were classified as low density according to CS 236-66 and had an average apparent density between treatments of 0.586g/cm³. A greater dimensional stability and a decrease in the static bending properties of the panels was observed as the proportion of macauba endocarp particles increased. The internal bonding of the panels showed a positive result with the increase in the use of particles of the residue. Conclusion:The panels produced have potential for use for non-structural purposes.

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Section: Introductionmentioning

confidence: 99%

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Menali,

Zidanes,

Dias

et al. 2024

CERNE

View full text Add to dashboard Cite

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Technological evaluation of Pinus maximinoi wood for industrial use in kraft pulp production

Coelho¹,

Silva²,

Milagres³

et al. 2021

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This study characterized Pinus maximinoi wood and evaluated its performance for pulp production. Samples of Pinus taeda wood were used as reference material. For both species, wood chips from 14-year-old trees were used for the technological characterization, pulping, bleaching process analysis, and pulp properties. A modified kraft pulping process was carried out targeting kappa number 28±5% on brownstock pulp. The bleaching sequence was applied for bleached pulp with final brightness of 87±1 % ISO. Refinability and resistance properties were measured in the bleached pulps. Compared to P. taeda wood, P. maximinoi showed slightly higher basic density (0.399 g/cm³) and higher holocellulose (64.5%), lignin (31.1%), and extractives content (4.5%), along with lower ash content (0.16%). P. maximinoi tracheids showed greater wall thickness (6.4 µm) when compared to P. taeda tracheids. For the same kappa number, P. maximinoi and P. taeda resulted in similar screened yield, with an advantage observed for P. maximinoi, which resulted in lower specific wood consumption (5.281 m³/o.d. metric ton), and lower black liquor solids (1.613 metric tons/o.d. metric ton). After oxygen delignification, P. maximinoi pulp showed higher efficiency on kappa reduction (67.2%) and similar bleaching chemical demand as P. taeda pulp. Compared to P. taeda pulps, the refined P. maximinoi pulps had similar results and the bulk property was 10% higher. Results showed that P. maximinoi is an interesting alternative raw material for softwood pulp production in Brazil.

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Potencial de uso de espécies de pinus tropicais para produção de painéis cimento-madeira

Cited by 2 publications

References 2 publications

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Production and analysis of the physical and mechanical of particleboards panels produced with Acrocomia aculeata endocarp

Technological evaluation of Pinus maximinoi wood for industrial use in kraft pulp production

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