含水草树皮单宁胶粘剂粘合交叉层合木材的性能研究

IF 0.6 4区 农林科学 Q4 FORESTRY
Bruna Rafaella Ferreira da Silva, João Gilberto Meza Ucella-Filho, E. C. Souza, Thalles Luiz Negreiros da Costa, T. Azevêdo, F. Mori, A. Pimenta
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引用次数: 1

摘要

摘要本研究旨在测定含羞草(野生)树皮中缩合单宁的含量。此外,我们还评估了用基于tenuflora单宁的胶粘剂粘合的交叉层压木材(CLT)板的物理力学性能。从五棵树上收集树皮。将粉末单宁、多聚甲醛和水在50℃下连续搅拌,合成胶粘剂配方。采用未经过任何化学处理或改性的原始树皮单宁提取物合成胶粘剂。测定了胶粘剂配方的粘度、pH、固形物含量和凝胶时间。CLT板是用桉树木材制造的。通过测定CLT板的物理(表观密度和吸水率)和力学(弹性模量- MOE,断裂模量- MOR和抗剪强度)性能来评估粘接性能。藤黄树皮中缩合单宁含量为23.4%。黏附性能:pH = 3.93, TS为50.64%,凝胶时间为460 s,黏度为6000 cP。MOE、MOR和抗剪强度分别为4411、16.18和1.06 MPa。tenuflora单宁在CLT胶粘剂的研制中具有广阔的应用前景。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
PROPERTIES OF CROSS-LAMINATED TIMBER BONDED WITH AN ADHESIVE BASED ON TANNINS FROM THE BARK OF Mimosa tenuiflora TREES
ABSTRACT This study aimed to determine the concentration of condensed tannins in the bark of Mimosa tenuiflora (Willd) Poir trees. Additionally, the physical-mechanical properties of cross-laminated timber (CLT) panels bonded with an adhesive based on M. tenuiflora tannins were assessed. Bark was collected from five trees. The adhesive formulation was synthesized by mixing powdered tannins, paraformaldehyde, and water at 50 °C under continuous stirring. Bark tannins extract in its pristine state without any previous chemical treatment or modification was employed to synthesize the adhesive. Viscosity, pH, solids content, and gel time of the adhesive formulation were determined. CLT panels were manufactured with Eucalyptus spp. wood. The bonding performance was assessed by determining the physical (apparent density and water absorption) and mechanical (modulus of elasticity – MOE, modulus of rupture – MOR, and shear strength) properties of the CLT panels. Condensed tannins content in the M. tenuiflora bark was 23.4%. Adhesive properties were pH = 3.93, TS of 50.64%, gel time of 460 s, and 6,000 cP for viscosity. Values of MOE, MOR and shear strength were 4,411, 16.18, and 1.06 MPa, respectively. The M. tenuiflora tannins are promising for the formulation of adhesives to bond CLT.
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来源期刊
Revista Arvore
Revista Arvore FORESTRY-
CiteScore
1.00
自引率
0.00%
发文量
32
审稿时长
4-8 weeks
期刊介绍: A Revista Árvore é um veículo de comunicação científica da Sociedade de Investigações Florestais – SIF. O jornal é de acesso gratuito, revisado por pares, que publica bimestralmente trabalhos científicos originais no campo da Ciência Florestal. As áreas temáticas para publicação são: Ambiência e Conservação da Natureza, Manejo Florestal, Silvicultura e Tecnologia da Madeira e Utilização de Produtos Florestais. A política editorial visa manter alta conduta ética em relação à publicação e aos seus funcionários, rigor na qualidade dos artigos científicos, seleção de revisores qualificados, respeito profissional aos autores e processo de tomada de decisão imparcial. A Revista Árvore publica artigos apenas em inglês. Artigos de revisão podem ser publicados se houver uma discussão relevante resumindo o estado da arte sobre o assunto. A revisão estrita da literatura não é aceita.
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