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metadata.artigo.dc.title: Preparation and characterization of tannin-based adhesives reinforced with cellulose nanofibrils for wood bonding
metadata.artigo.dc.creator: Zidanes, Uasmim Lira
Dias, Matheus Cordazzo
Lorenço, Mário Sérgio
Araujo, Elesandra da Silva
Silva, Maryella Júnnia Ferreira e
Sousa, Thaís Brito
Ferreira, Saulo Rocha
Ugucioni, Júlio César
Tonoli, Gustavo Henrique Denzin
Bianchi, Maria Lucia
Mori, Fábio Akira
metadata.artigo.dc.subject: Adenanthera peregrina
Fourier Transform Infrared Spectroscopy (FTIR)
Nano-structured adhesive
Natural adhesive
Espectroscopia no infravermelho por transformada de Fourier
Adesivo nanoestruturado
Adesivo natural
Nanofibrilas de celulose
metadata.artigo.dc.publisher: De Gruyter Aug-2020
metadata.artigo.dc.identifier.citation: ZIDANES, U. L. et al. Preparation and characterization of tannin-based adhesives reinforced with cellulose nanofibrils for wood bonding. Holzforschung, [S. I.], v. 75, n. 2, p. 159-167, 2020. DOI:
metadata.artigo.dc.description.abstract: Adhesives based on vegetable tannins are already a reality in the market. However, their use is still limited due to their low mechanical resistance and weak humidity resistance. Cellulose nanofibrils (CNFs) are being used as reinforcing materials in various composites, resulting in an improvement of mechanical proprieties in general. The objective of this work was to evaluate the incorporation of CNFs in adhesives made of tannins obtained from the Angico tree (Anadenanthera peregrine). Concentrations of nanofibrils at 1, 5, and 10% were added to the adhesives on a dry basis. Tests of viscosity, pH, solids content, and gel time were performed to determine the physical proprieties of the adhesives. The Attenuated Total Reflectance Fourier Transform Infrared Spectroscopy (ATR-FTIR) and Raman spectra measurements were also determined to understand the interaction between tannin sand CNFs. Thermogravimetric analyses (TGA) were carried out to determine the thermal resistance of the composite. The FTIR and Raman characterization identified some differences in the peaks in the chemical composition of the adhesives with different percentages of CNFs. The adhesives showed no different decomposition in the thermogravimetric analyses. The shear strength in the glue line of the adhesive with 5% of CNFs in Toona ciliate woods was determined. Among all the adhesives analyzed, the one with 5% of CNFs produced an improvement in the mechanical resistance and humidity resistance on the glue line.
metadata.artigo.dc.language: en
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