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dc.creatorZidanes, Uasmim Lira-
dc.creatorDias, Matheus Cordazzo-
dc.creatorLorenço, Mário Sérgio-
dc.creatorAraujo, Elesandra da Silva-
dc.creatorSilva, Maryella Júnnia Ferreira e-
dc.creatorSousa, Thaís Brito-
dc.creatorFerreira, Saulo Rocha-
dc.creatorUgucioni, Júlio César-
dc.creatorTonoli, Gustavo Henrique Denzin-
dc.creatorBianchi, Maria Lucia-
dc.creatorMori, Fábio Akira-
dc.date.accessioned2021-07-23T17:49:55Z-
dc.date.available2021-07-23T17:49:55Z-
dc.date.issued2020-08-
dc.identifier.citationZIDANES, 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: https://doi.org/10.1515/hf-2020-0033.pt_BR
dc.identifier.urihttps://doi.org/10.1515/hf-2020-0033pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/46803-
dc.description.abstractAdhesives 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.pt_BR
dc.languageenpt_BR
dc.publisherDe Gruyterpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceHolzforschungpt_BR
dc.subjectAdenanthera peregrinapt_BR
dc.subjectFourier Transform Infrared Spectroscopy (FTIR)pt_BR
dc.subjectNano-structured adhesivept_BR
dc.subjectNatural adhesivept_BR
dc.subjectEspectroscopia no infravermelho por transformada de Fourierpt_BR
dc.subjectAdesivo nanoestruturadopt_BR
dc.subjectAdesivo naturalpt_BR
dc.subjectNanofibrilas de celulosept_BR
dc.titlePreparation and characterization of tannin-based adhesives reinforced with cellulose nanofibrils for wood bondingpt_BR
dc.typeArtigopt_BR
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