Adição de nanopartículas em painéis engenheirados de madeira / Addition of nanoparticles in engineered wood panels

Lima, Felipe Oliveira; Silva, Luana Cristal Lirya; Favarim, Higor Rogério; Campos, Cristiane Inácio de

doi:10.34117/bjdv8n1-173

Cited by 4 publications

(8 citation statements)

References 3 publications

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“…Thus, although the addition of nanoparticles does not directly interfere in the final pressing temperature of the panels, they influence the form of heat distribution and concentration during the cycle and the entire process of loss of steam, drying, and curing of the OSB, consequently impacting in the panel physical properties. Lima et al (2022). "Al2O3 nanoparticles in OSB panels," BioResources 17(2), 3014-3024.…”

Section: Resultsmentioning

confidence: 99%

“…However, this did not significantly affect the other properties, such as thickness swelling, for example, which, due to the acceleration of the resin curing process and less material displacement, ended up decreasing. Lima et al (2022). "Al2O3 nanoparticles in OSB panels," BioResources 17(2), 3014-3024.…”

Section: Bioresourcescommentioning

confidence: 99%

“…PEER-REVIEWED ARTICLE bioresources.com Lima et al (2022). "Al2O3 nanoparticles in OSB panels," BioResources 17(2), 3014-3024.…”

Section: Introductionmentioning

confidence: 99%

“…Nanoscale materials are a new technological trend that may reveal new behaviors and properties, making nanoparticles a promising material with ease of deployment in this sector (Silva et al 2021). According to Lima et al (2022), the properties and characteristics of the material used on a nanometric scale are defined by the modification caused in the arrangement of atoms and molecules by reducing their size, improving the physical and chemical properties of the material. Unusual changes occur in the properties of a solid when its grain size is reduced to the nanometric scale (Taghiyari 2011).…”

Section: Introductionmentioning

confidence: 99%

“…According to Mantanis and Papadopoulos (2010), the reduced size of the nanoparticles of nanotechnology compounds makes them penetrate deep into the wood, PEER-REVIEWED ARTICLE bioresources.com Lima et al (2022). "Al2O3 nanoparticles in OSB panels," BioResources 17(2), 3014-3024.…”

Section: Introductionmentioning

confidence: 99%

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Influence of the addition of Al2O3 nanoparticles and the duration of pressing on the physical properties of OSB panels

Lima

Silva

Morais

et al. 2022

BioRes

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For greater durability, materials must withstand contact with water, making it difficult for biodegrading agents to attack. The present study produced and evaluated the heat transfer for two pressing times and the physical properties of OSB panels, produced with pinewood strands and Al2O3 nanoparticles addition. The nanoparticles were synthesized through the sol-gel-protein method and added to the resin in the proportion of 0.5%. During the pressing process, heat transfer and distribution in the central region of the particle mat were evaluated using a type K thermocouple. After its fabrication, the panels were characterized to evaluate density, moisture content, thickness swelling, and water absorption. The results obtained indicated that the nanoparticle addition caused a refractory effect in the central region of the mat, leading to a small reduction in the pressing temperature for the 600 s cycle. However, there was no compromise in resin cure, indicating good interaction of the panels with nanoparticles in water contact, for both pressing times. There was an improvement in the panel thickness swelling with the addition of 0.5% of Al2O3 nanoparticles, with all properties meeting the Class 1 indicators of the EN 300 (2006) standard.

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Section: Resultsmentioning

confidence: 99%

Section: Bioresourcescommentioning

confidence: 99%

“…PEER-REVIEWED ARTICLE bioresources.com Lima et al (2022). "Al2O3 nanoparticles in OSB panels," BioResources 17(2), 3014-3024.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of the addition of Al2O3 nanoparticles and the duration of pressing on the physical properties of OSB panels

Lima

Silva

Morais

et al. 2022

BioRes

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Caracterização física e mecânica de painéis LVL de paricá (Schizolobium parahyba var. amazonicum (Huber x Ducke)) colados com ureia-formaldeído

Lima,

Nascimento,

Silva

et al. 2023

Matéria (Rio J.)

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RESUMO O trabalho teve como objetivo determinar as propriedades físicas e mecânicas de painéis LVL de paricá (Schizolobium parahyba var. amazonicum (Huber x Ducke)) colados com resina ureia-formaldeído. Foram produzidos 6 painéis LVL com 17 lâminas de 2,5 mm de espessura, sendo 14 lâminas de paricá e 3 lâminas de marupá (Simarouba amara Aubl.). Para a condição de umidade padrão de 12%, foram realizados ensaios de teor de umidade, densidades aparente e básica (caracterização física), resistências à compressão paralela e perpendicular às fibras, tração paralela às fibras, cisalhamento na linha de cola e flexão estática flatwise e edgewise (caracterização mecânica). Na condição de saturação total da madeira, foram realizados ensaios de compressão paralela às fibras e cisalhamento na linha de cola do LVL. Os resultados mostraram que os painéis LVL se enquadram na classe de resistência D30, caracterizado com média densidade. Foi observado o modo de ruptura do tipo frágil em todos os ensaios mecânicos, exceto nos ensaios de compressão paralela e perpendicular às fibras. O aumento do teor de umidade, decorrente da saturação total da madeira, influenciou de forma negativa nas resistências à compressão paralela às fibras e ao cisalhamento na linha de cola. O LVL apresentou desempenho mecânico compatível com as solicitações estruturais.

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Plant Lectins: A Review on their Biotechnological Potential Toward Human Pathogens

Costa

Malveira

Mendonça

et al. 2022

CPPS

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The indiscriminate use of antibiotics is associated with the appearance of bacterial resistance. In light of this, plant-based products treating infections are considered potential alternatives. Lectins are a group of proteins widely distributed in nature, capable of reversibly binding carbohydrates. Lectins can bind to the surface of pathogens and cause damage to their structure, thus preventing host infection. The antimicrobial activity of plant lectins results from their interaction with carbohydrates present in the bacterial cell wall and fungal membrane. The data about lectins as modulating agents of antibiotic activity, potentiates the effect of antibiotics without triggering microbial resistance. In addition, lectins play an essential role in the defense against fungi, reducing their infectivity and pathogenicity. Little is known about the antiviral activity of plant lectins. However, their effectiveness against retroviruses and parainfluenza is reported in the literature. Some authors still consider mannose/glucose/N-Acetylglucosamine binding lectins as potent antiviral agents against coronavirus, suggesting that these lectins may have inhibitory activity against SARS-CoV-2. Thus, it was found that plant lectins are an alternative for producing new antimicrobial drugs, but further studies still need to decipher some mechanisms of action.

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Adição de nanopartículas em painéis engenheirados de madeira / Addition of nanoparticles in engineered wood panels

Cited by 4 publications

References 3 publications

Influence of the addition of Al2O3 nanoparticles and the duration of pressing on the physical properties of OSB panels

Influence of the addition of Al2O3 nanoparticles and the duration of pressing on the physical properties of OSB panels

Caracterização física e mecânica de painéis LVL de paricá (Schizolobium parahyba var. amazonicum (Huber x Ducke)) colados com ureia-formaldeído

Plant Lectins: A Review on their Biotechnological Potential Toward Human Pathogens

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