Propriedades físicas e mecânicas de painéis de madeira aglomerada de &lt;i&gt;Acrocarpus fraxinifolius&lt;/i&gt;, compostos com diferentes percentuais de casca

Trianoski, Rosilani; Iwakiri, Setsuo; Matos, Jorge Luís Monteiro de; Prata, José Guilherme

doi:10.5902/1980509812360

Cited by 5 publications

(5 citation statements)

References 3 publications

(4 reference statements)

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“…Due to the lower density of the pine wood, the veneers tend to absorb more adhesive material, being able to form a starved glue line (Baldwin, 1993;Marra, 1992;Sellers, 1993), impairing the dimensional stability of the panels. Another aspect observed by Trianoski et al (2013) is that Pinus wood has more acidic pH than that of Indian cedar wood, which may hinder the polymerization of phenol-formaldehyde (Marra, 1992), and consequently release possible rates of return of the veneers after pressing, which also helps to understand the difference between the specific masses observed between the veneers associations evaluated in this study.…”

Section: Physical Properties Of Plywoodmentioning

confidence: 96%

“…The variations observed in the properties of the panels with three cedar veneers in different positions for the MOE parallel to the fibers are related to the position of the fibers in the Indian cedar veneers, once these veneers are more resistant and rigid than the veneers of pine. The variation in SS, on the other hand, can be explained by the higher number of pores and the lower pH of the pine wood (Trianoski et al, 2013), impairing the quality of the bonding of the panels. However, it is noteworthy that both panels produced in this study obtained good SS in the glue line.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

et al. 2019

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The present study has the objective of evaluating the physical-mechanical properties of plywood produced with Acrocarpus fraxinifolius wood, as well as the effect of combining their veneer with Pinus veneer. The wood of Acrocarpus fraxinifolius and Pinus oocarpa were used in the production of the panels. The plywood was produced with five veneers; the adhesive used was phenol-formaldehyde, weighing 320 g.m -2 . The evaluated properties were: equilibrium moisture (EM), specific mass (SM), water absorption (WA), thickness swelling (TS), shear strength (SS), modulus of rupture (MOR) and modulus of elasticity (MOE) both parallel and perpendicular to the fibers. No statistical difference was observed in the EM and TS, whereas all other properties showed statistical differentiation between the treatments. In general, the use of Acrocarpus fraxinifolius veneers improved the physical-mechanical properties of the compensated ones. Thus, the use of this species in the production of plywood is technically feasible.

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Section: Physical Properties Of Plywoodmentioning

confidence: 96%

Section: Mechanical Propertiesmentioning

confidence: 99%

Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

et al. 2019

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“…The species is already being used mainly as a raw material in plywood. Pink cedar is suitable for making particleboard (Trianoski et al, 2011), preservative-treated plywood, marine, fire retardant plywood, and plywood for concrete securing grind (Shukla et al, 1993). It is also used as the core material for plywood panels (Pinati et al, 2018).…”

Section: Resultsmentioning

confidence: 99%

Suitability of Acrocarpus fraxinifolius as a Pulping Raw Material

Ashwath,

Sathish,

Akshayakumari

et al. 2023

IJEP

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The present study emphasized on wood trait indices of Acrocarpus fraxinifolius for understanding the suitability of the species for paper and pulp industries. The study was conducted at the College of Forestry, Ponnampet, Karnataka in 2020. The wood core samples were collected from the trees falling under 130 to 150 cm girth class, standing in coffee-based agroforestry systems of Kodagu, Karnataka, India. A total of 12 wood core samples were collected using the Presseler’s increment borer at breast height level. For wood fibre analysis the core portion was divided and three, i.e., near to the pith portion, middle and periphery, and made as a composite sample. Core samples were macerated using Jeffreys solution technique at Forest Product and Utilization Laboratory, College of Forestry, UAHS, Shivamogga. Fifty measurements on fibre parameters (Fibre length, Fibre width, Fibre wall thickness, and Fibre Lumen width) were recorded for each sample under a stereomicroscope with an inbuilt Image Analyzer. The mean fibre properties recorded, were used for calculating wood anatomical indices such as the Runkel ratio, Slenderness ratio, Flexibility coefficient, and Rigidity coefficient using standard formulas. The mean Runkel ratio, Slenderness ratio, Flexibility coefficient, and Rigidity coefficient were 0.580, 60.132, 63.290, and 0.184 respectively. The anatomical screening suggests that the species can be used as raw material for paper production, based on the indices. Further research is required to explore the mechanical and chemical properties of commercial exploitation for pulping.

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“…In a study on macauba endocarp, Silva et al, (1986) obtained the value of 1.161 g/cm³ for the basic density. With regard to the wood of Pinus oocarpa, Silva et al, (2018) and Scatolino et al, (2013) found a basic density value of 0.473 g/cm³ while Trianoski et al, (2013) obtained a value of 0.54 g/cm³.…”

Section: Chemical and Physical Properties Of The Raw Materials Usedmentioning

confidence: 93%

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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Propriedades físicas e mecânicas de painéis de madeira aglomerada de <i>Acrocarpus fraxinifolius</i>, compostos com diferentes percentuais de casca

Cited by 5 publications

References 3 publications

Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

Physical-mechanical Properties of Plywood Produced With Acrocarpus fraxinifolius and Pinus oocarpa

Suitability of Acrocarpus fraxinifolius as a Pulping Raw Material

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

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