Production of Structural Particleboard of Mimosa Scabrella Benth With Lignin Phenol-formaldehyde Resin

Iwakiri, Viviane Teixeira; Trianoski, Rosilani; Razera, Dalton Luiz; Iwakiri, Setsuo; Rosa, Thiago Souza da

doi:10.1590/2179-8087.100617

Cited by 6 publications

(6 citation statements)

References 5 publications

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“…The mean values of WA and TS after 2 and 24 h of immersion in water obtained in this study were also higher than the results reported by some researchers [62] in particleboards produced with lignin-phenol-formaldehyde resin with density of 750 and 950 kg/m 3 . In other works [38,40], it was also indicated that manufactured MDF panels using 15% gluing content of MgLS exhibited a deteriorated dimensional stability (thickness swelling and water absorption (24 h)).…”

Section: Physical Properties Of Particleboardscontrasting

confidence: 83%

Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

et al. 2021

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The purpose of this study was to evaluate the feasibility of using magnesium and sodium lignosulfonates (LS) in the production of particleboards, used pure and in mixtures with urea-formaldehyde (UF) resin. Polymeric 4,4′-diphenylmethane diisocyanate (pMDI) was used as a crosslinker. In order to evaluate the effect of gradual replacement of UF by magnesium lignosulfonate (MgLS) or sodium lignosulfonate (NaLS) on the physical and mechanical properties, boards were manufactured in the laboratory with LS content varying from 0% to 100%. The effect of LS on the pH of lignosulfonate-urea-formaldehyde (LS-UF) adhesive compositions was also investigated. It was found that LS can be effectively used to adjust the pH of uncured and cured LS-UF formulations. Particleboards bonded with LS-UF adhesive formulations, comprising up to 30% LS, exhibited similar properties when compared to boards bonded with UF adhesive. The replacement of UF by both LS types substantially deteriorated the water absorption and thickness swelling of boards. In general, NaLS-UF-bonded boards had a lower formaldehyde content (FC) than MgLS-UF and UF-bonded boards as control. It was observed that in the process of manufacturing boards using LS adhesives, increasing the proportion of pMDI in the adhesive composition can significantly improve the mechanical properties of the boards. Overall, the boards fabricated using pure UF adhesives exhibited much better mechanical properties than boards bonded with LS adhesives. Markedly, the boards based on LS adhesives were characterised by a much lower FC than the UF-bonded boards. In the LS-bonded boards, the FC is lower by 91.1% and 56.9%, respectively, compared to the UF-bonded boards. The boards bonded with LS and pMDI had a close-to-zero FC and reached the super E0 emission class (≤1.5 mg/100 g) that allows for defining the laboratory-manufactured particleboards as eco-friendly composites.

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Section: Physical Properties Of Particleboardscontrasting

confidence: 83%

Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

et al. 2021

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“…Among the most requested, phenol-formaldehyde stands out, which is one of the main types of synthetic thermoset adhesive used by the wood panel industries. Widely used in the production of panels for structural purposes intended for the external environment, with or without protection (Iwakiri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Furtini

Santos

Garcia

et al. 2021

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The growth of the civil construction sector, made necessary to develop alternative products made of sustainable materials. Within this context came the cross laminated timber panels (CLT), which are formed by gluing veneer arranged at 90°, which provide high strength and great versatility, as constructive elements. This research aimed to evaluate the chemical properties of the particles of both materials and evaluate the performance of CLT panels made with Pinus oocarpa and waste wood from Coffea arabica. The panels were made with three orthogonal layers with veneer of pine and coffee wood, using the phenol-formaldehyde (PF) adhesive with a spread rate of 0.35kgm -² and the hydraulic press with a pressure of 1,2×10 7 N.m -2 for 15 min. The physical, mechanical properties, acoustic and thermal performance of the panels were evaluated. There was a significant difference for water absorption in 2 and 24 hours. The panels produced only with coffee wood waste showed the lowest water absorption rates, corresponding to 10.2 and 33.3%, in 2 and 24 hours. In relation to the MOE, the panels made with varied veneer were statistically equivalent to each other and the panels made of pine blades showed a MOE corresponding to 3,33×10 7 N.m -2 . The same trend was observed for MOR, since the average value obtained for pine panels, corresponding to 1,35x10 8 N.m -2 was significantly higher. Panels made of coffee veneer and pine veneer showed no delamination. With regard to acoustic and thermal evaluation, all panels met the minimum requirements indicated in the standards, with emphasis on coffee wood waste, associated or not with pine wood.

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“…Panels produced with wood particles, pressed with synthetic adhesives under heat and pressure, are called particleboards. For the production of particleboards in Brazil, the species of the genus Pinus and Eucalyptus from forest plantations are used (Iwakiri et al, 2019), but any material with chemical constitution similar to wood (cellulose, hemicellulose and lignin) can be used as raw material.…”

Section: Introductionmentioning

confidence: 99%

“…In the particleboard industry, in addition to the raw material, the adhesive is another factor of great importance. Resins based on urea-formaldehyde and phenol-formaldehyde are the main types of synthetic thermoset adhesives used by the wood particleboard industries (Iwakiri et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Among the advantages are the low cost, the color and it is easy to work with, however it has low resistance to humidity. Phenolformaldehyde is the most used in the production of particleboards for structural purposes intended for the external environment, with or without protection, such as plywood and OSB (Iwakiri et al, 2019). The type of adhesive and the content used in the manufacture of the sheets depends on the type of product and its application.…”

Section: Introductionmentioning

confidence: 99%

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Physical-mechanical properties of panels produced with corn cob particles and different types and contents of adhesives

Oliveira

Brito

Villela

et al. 2021

RSD

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The objective of this research was to evaluate the best type and adequate content of adhesive in low density particleboards produced with corn cob, in addition to the chemical analysis of the particles. The adhesives used were urea-formaldehyde (UF) and phenol-formaldehyde (PF) distributed in three levels (6, 9 and 12%) on the dry mass of the particles and the nominal density was 0.60 g.cm-3. Regarding the water absorption and swelling properties, no significant differences were found between treatments. The mean value calculated for the IE 24 h was 37.07%, being above the minimum limit stipulated by the standard. The modulus of rupture (MOR) and modulus of elasticity (MOE), were influenced by the tested factors. All particleboards met the requirements of the standard norm. For internal adhesion there was a significant effect only for the type of adhesive factor, with the particleboards produced with PF showing the highest means. For the compression property there was no effect of the factors tested. In general, the dimensional stability of the particleboards was below the minimum required by the standard, but the mechanical properties met all requirements.

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Production of Structural Particleboard of Mimosa Scabrella Benth With Lignin Phenol-formaldehyde Resin

Cited by 6 publications

References 5 publications

Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

Performance of cross laminated timber panels made of Pinus oocarpa and Coffea arabica waste

Physical-mechanical properties of panels produced with corn cob particles and different types and contents of adhesives

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