INTEMA   05428
INSTITUTO DE INVESTIGACIONES EN CIENCIA Y TECNOLOGIA DE MATERIALES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Viscosity and wettability study of soy protein adhesives modified by condensed tannin
Autor/es:
L. ESPÓSITO; I. SOLABERRIETA; J.P. ESPINOSA; D. MARIN QUINTERO; R.A. RUSECKAITE; J.C. PITER; P.M. STEFANI
Reunión:
Workshop; 5th Workshop Green Chemistry and Nanotechnologies in Polymer Chemistry, ECLIPSE Workshop, BIOPURFIL Workshop; 2014
Institución organizadora:
UPV/EHU
Resumen:
The interest about bio-based adhesives has been renewed owing to environmental impactcaused by petrolum-based polymers [1]. Soy protein concentrate (SPC) is an attractivealternative due to its low-cost and environmentally friendly [2]. The ability of SPC adhesiveto wet a substrate surface and its rheological properties are a key prerequisite to obtain a betteradhesiveness.2 However, low adhesion strength and water resistance greatly of soy proteinadhesives limit their practical applications. Based on reported results [3], a better adhesiveperformance could be obtained using SPC combined with tannins [4]. Several researchershave reported reversible interactions (non-covalent forces) such as hydrogen bonding, hydrophobic and van der Waals forces between tannins and proteins [5]. The ratio tannin/proteinplays an important role to generate the required rheological behavior for proper performanceof adhesives [6]. In this context of analysis, the aim of this research is determinate the optimumconditions of an aqueous adhesive based on mimosa tannin and soy protein concentrateto use in wood applications and explain the connection between viscosity and wettability behaviorof these bio-based adhesives.