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Artículo

Rheological Characterization of a Wood Adhesive Based on a Hydrolyzed Soy Protein Suspension

Bacigalupe, Alejandro; Cova, Maríajosé; Cedrés, Juan Pablo; Cancela, Guillermo Ezequiel; Escobar, Mariano MartinIcon
Fecha de publicación: 06/2020
Editorial: Springer
Revista: Journal of Polymers and the Environment
ISSN: 1566-2543
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Papel y Madera

Resumen

Soy protein (SP) is a promising raw material for the development of renewable and environmentally friendly adhesives. This work aims to study the effect of protein denaturation and/or hydrolysis on the rheology of a soy protein isolate (SPI) suspension. Four stages of chemical modification of SPI were evaluated: unmodified (U), denatured (D), partially hydrolyzed (PH) and fully hydrolyzed (H). Fourier-transform infrared spectroscopy (FTIR) and sodium dodecyl sulfate–polyacrylamide gel electrophoresis (SDS-PAGE) confirmed that polypeptides with high molecular weight were fully fragmented into smaller ones. Rheological analysis showed that U behaves as a gel-like material while PH and H act as viscous-like materials. Hydrolysis caused a significant decrease in the viscosity, even for suspensions with high solid content. Furthermore, comparing U and H, the viscosity at high shear strength dropped 65% with an increase of 219% in the solid content. The shear strength of the adhesives can be increased through two strategies: crosslinking with epoxy resin and the addition of different reinforcements. Considering suspension H as reference, the addition of 20% epoxy resin and 5% montmorillonite clay caused an increase in the shear strength of almost 39%. These results could contribute to the development of high solid content SP-based adhesive with desirable rheological properties and zero formaldehyde emission.
Palabras clave: ADHESIVE , RHEOLOGY , SOY PROTEIN , WOOD
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info:eu-repo/semantics/restrictedAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/169642
URL: http://link.springer.com/10.1007/s10924-020-01784-x
DOI: https://doi.org/10.1007/s10924-020-01784-x
Colecciones
Articulos(SEDE CENTRAL)
Articulos de SEDE CENTRAL
Citación
Bacigalupe, Alejandro; Cova, Maríajosé; Cedrés, Juan Pablo; Cancela, Guillermo Ezequiel; Escobar, Mariano Martin; Rheological Characterization of a Wood Adhesive Based on a Hydrolyzed Soy Protein Suspension; Springer; Journal of Polymers and the Environment; 28; 9; 6-2020; 2490-2497
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