Painéis de partículas provenientes de rejeitos de Pinus sp. tratado com preservante cca e resina derivada de biomassa

Bertolini, Marília da Silva; Nascimento, Maria Fátima do; Christofóro, André Luis; Lahr, Francisco Antônio Rocco

doi:10.1590/s0100-67622014000200014

Cited by 19 publications

(15 citation statements)

References 7 publications

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“…All treatments showed high density (above 800 kg m -3 ). This variation was also observed in other studies, such as Bertolini et al (2014), Fiorelli et al (2015) and Gava et al (2015). According to Iwakiri (2005), differences in the final density of the panel are associated with the material used in the respective process of manufacture, variables such as the moisture content of the particles and the differences in density between the particles used in the manufacture of such panels.…”

Section: Resultssupporting

confidence: 87%

“…Two types of adhesives were used: polyurethane based on castor oil (PU) and melamine formaldehyde (MF). The PU adhesive was adopted due to its good performance obtained in previous studies, conducted at the LaMEM/SET, with wood panels (Bertolini et al, 2014;Macedo et al, 2015;Nascimento et al, 2017). This is an adhesive of mostly natural and renewable origin.…”

Section: Methodsmentioning

confidence: 99%

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Physical performance of particleboards using Castor oil-based adhesive

Varanda¹,

Yamaji²,

Santos³

et al. 2018

Rev. bras. eng. agríc. ambient.

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Reconstituted wood panels are widely used in various branches of the wood industry, such as in the furniture sectors and various segments of urban and rural construction. In Brazil, agricultural and forestry residues are abundantly generated, making feasible the study, development and application of alternative and sustainable materials, produced from the use of these wastes. The aim of this study was to produce high-density homogenous panels with wood residues of Pinus elliottii and oat hulls (Avena sativa), pressed with two types of adhesive, castor oil-based polyurethane and melamine formaldehyde, and to evaluate the physical performance of these panels. The physical performance of the panels was evaluated based on the ABNT NBR 14810: 2006, ANSI A208.1: 1999 and BS EN 312: 2003 standards. Analysis of variance (ANOVA) was performed to test the influence of the factors percentage of oat hull, percentage of adhesive and type of adhesive, and the interactions between these factors on the physical properties of the panels. The results indicated physical properties, in some treatments superior to the requirements stipulated by the consulted standards. It was concluded that the panels produced with the castor oil-based polyurethane adhesive showed better physical performance when compared with the panels produced with the melamine formaldehyde adhesive.

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Section: Resultssupporting

confidence: 87%

Section: Methodsmentioning

confidence: 99%

Physical performance of particleboards using Castor oil-based adhesive

Varanda¹,

Yamaji²,

Santos³

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…Urea-formaldehyde resin (pH = 7.8; solids content = 65%; density = 1.27 g/cm³) was used as adhesive. In order to replace the urea-formaldehyde, the epoxy ink waste and the polyhydroxybutyrate polymer (BTH), both in the solid state and in the form of very fine powders, were used in the proportions shown in Tables 1 and 2, respectively. About the parameters presented in Table 1 (to particleboards with epoxy ink waste), the pressure used (4 MPa) was according to Nascimento et al (2017), Macedo et al (2015) and Bertolini et al, (2014). For pressing time, the minimum necessary to complete the melting of the epoxy ink waste at the adopted temperatures was used.…”

Section: Methodsmentioning

confidence: 99%

Particleboards Produced With Epoxy Ink Waste and BTH Polymer as Adhesives

et al. 2018

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The aim of this research was to analysis the feasibility of production of wood particleboard with two alternative adhesives: epoxy ink waste and polyhydroxybutyrate polymer (BTH). Particleboard were produced with Pinus sp. wood specie wastes from sawmill process. For each alternative adhesive was proposed different combinations of parameters: time and temperature of press, pressure; alternative adhesive content and mass of wood particles. Two alternative adhesive contents were adopted, 10% and 20% replacing ureaformaldehyde adhesive. Mechanical properties (perpendicular tensile strength, pullout strengths of screw on face and top; modulus of elasticity and rupture) were determined according to ABNT NBR 14810:3 Brazilian Standard Code. The obtained results were compared to ABNT NBR 14810:3 and ANSI A.2018:1 Standard Codes requirements values. Particleboards produced with epoxy ink waste showed perpendicular tensile strength according to the minimum Standards requirements values. All proposed combinations to manufacture BTH polymer particleboards didn't show satisfactory mechanical properties in comparison to the Standard Codes values. Other combinations of wood species, time, pressure and temperature, epoxy ink waste and BTH polymer contents should be studied so that the requirements can be met.

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“…In addition, the low shear strength in the glue line of the wood treated with CCA and CCB may be explained by the interaction of the adhesive in the presence of the preservative. This interaction may be impaired by the chemical adhesion of the preservative to the cell walls, which blocks part of the molecular attraction forces (Bertolini et al, 2014). The shear strength depends on the strength of the adherent materials wood and adhesive, on the stress distribution within the glue line and on the ability of the adhesive to transfer the acting stress into the glue line and thus from one adherent surface to the other (Steiger;Arnold;Risi, 2014).…”

Section: Mechanical Characterization Of the Glulam Beams Of Rubberwoodmentioning

confidence: 99%

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

et al. 2020

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This work aimed to evaluate the physical and mechanical behavior of glued laminated timber (GLT) - glulam pieces of Hevea brasiliensis treated with chromed copper arsenate (CCA), chromed copper borate (CCB) and pyrethroid in the production of GLT. The pieces were produced using three wooden laminae with dimensions of 60 x 20 x 1200 mm, (width x thickness x length), joined with epoxy adhesive under 1.0 MPa pressure for 24h at room temperature. The rubberwood had an apparent density of 0.624 g cm-3, a value close to that of Eucalyptus grandis wood, a species traditionally used in the manufacture of GLT. Regarding the GLT parts, it was observed that the preservative treatment with CCA and CCB influenced negatively the values of the mechanical properties. For resistance modulus (MOR), a reduction of 75.44 MPa to 62.36 and 58.57 MPa was found for the parts untreated and treated with CCA and CCB, respectively. There was no statistical difference for surface treatment with pyrethroid. The photomicrographs of the glue line showed that the reduction in these values was mainly due to the penetration of preservative solutions into the wood structure (cell lumens and vessels or pores), impairing the anchoring of the adhesive.

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Painéis de partículas provenientes de rejeitos de Pinus sp. tratado com preservante cca e resina derivada de biomassa

Cited by 19 publications

References 7 publications

Physical performance of particleboards using Castor oil-based adhesive

Physical performance of particleboards using Castor oil-based adhesive

Particleboards Produced With Epoxy Ink Waste and BTH Polymer as Adhesives

Physical and mechanical behavior of glulam beams produced with rubberwood treated with preservatives

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