PROPERTIES OF CROSS-LAMINATED TIMBER BONDED WITH AN ADHESIVE BASED ON TANNINS FROM THE BARK OF Mimosa tenuiflora TREES

Authors

  • Bruna Rafaella Ferreira da Silva Universidade Federal Rural de Pernambuco, Programa de Pós-Graduação em Ciências Florestais, Recife, PE - Brasil
  • João Gilberto Meza Ucella Filho Universidade Federal do Espírito Santo, Programa de Pós-Graduação em Ciências Florestais, Jerônimo Monteiro, ES - Brasil
  • Elias Costa de Souza Universidade de São Paulo, Programa de Pós-Graduação em Recursos Florestais, Butanta, SP - Brasil
  • Thalles Luiz Negreiros da Costa Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Natal, RN - Brasil
  • Tatiane Kelly Barbosa de Azevêdo Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Natal, RN - Brasil
  • Fábio Akira Mori Universidade Federal de Lavras, Departamento de Ciências Florestais, Lavras, MG - Brasil
  • Alexandre Santos Pimenta Universidade Federal do Rio Grande do Norte, Departamento de Engenharia Florestal, Natal, RN - Brasil

Keywords:

Polyphenols, Cross-laminated timber, Brazilian dry forest

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.

Keywords: Polyphenols; Cross-laminated timber; Brazilian dry forest

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Published

2022-08-15

How to Cite

da Silva, B. R. F., Ucella Filho, J. G. M., de Souza, E. C., da Costa, T. L. N., de Azevêdo, T. K. B., Mori, F. A., & Pimenta, A. S. (2022). PROPERTIES OF CROSS-LAMINATED TIMBER BONDED WITH AN ADHESIVE BASED ON TANNINS FROM THE BARK OF Mimosa tenuiflora TREES. Revista Árvore, 46(1), https://doi.org/10.1590/1806–908820220000020. Retrieved from https://revistaarvore.ufv.br/rarv/article/view/260955

Issue

Revista Árvore, Viçosa-MG, v.46, 2022

Section

Wood Technology and Utilization of Forest Products

License

All authors agreed to submit the work to Revista Árvore and granted the exclusive license to publish the article. The authors affirm that it is an original work and has not been previously published elsewhere. The scientific content and opinions expressed in the article are the sole responsibility of the authors and reflect their opinions, not necessarily representing the opinions of the editorial board of Revista Árvore or of the Society of Forest Investigations (SIF).

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