Induced tannin adhesive by boric acid addition and its effect on bonding quality and biological performance of poplar plywood

Efhamisisi Davood, Thévenon Marie-France, Hamzeh Yahya, Karimi Ali-Naghi, Pizzi Antonio, Pourtahmasi Kambiz. 2016. Induced tannin adhesive by boric acid addition and its effect on bonding quality and biological performance of poplar plywood. ACS Sustainable Chemistry and Engineering, 4 (5) : 2734-2740.

Quartile : Q1, Sujet : ENGINEERING, CHEMICAL / Quartile : Q1, Sujet : GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY (Science) / Quartile : Q1, Sujet : CHEMISTRY, MULTIDISCIPLINARY

Résumé : Quebracho tannin wood adhesive in a nonformaldehyde approach has a low hardening rate and needs more pressing time than formaldehyde-based wood adhesives during wood composites production. In this study, boric acid (BA) was used to increase autocondensation rate of tannin to make poplar plywood. The main ingredients of the adhesives included quebracho tannin, NaOH, hexamine, BA and polymeric isocyanate (PMDI). Thermomechanical analysis of without BA adhesives showed that maximum modulus of elasticity increased with increasing the initial tannin concentration from 40% to 50% (w/w), whereas no significant effect has been found by adding PMDI. Moreover, the addition of BA lowered time and temperature of hardening and increased modulus of elasticity of the adhesive. Also, tensile shear strength increased significantly with increasing the tannin concentration and the BA content (from 2% to 4%). Interestingly, applied BA in the glueline not only improved bonding quality of the panels but also provided good preservative performance against fungal attack even after mild leaching test.

Mots-clés Agrovoc : contreplaqué, bois, Populus deltoides, tannin, adhésif, acide borique, propriété physicochimique, propriété mécanique, préservation du bois

Mots-clés complémentaires : Schinopsis balansae, Collage, Résistance des matériaux

Classification Agris : K50 - Technologie des produits forestiers
J12 - Manutention, transport, stockage et conservation des produits forestiers

Champ stratégique Cirad : Axe 2 (2014-2018) - Valorisation de la biomasse

Auteurs et affiliations

• Efhamisisi Davood, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Thévenon Marie-France, CIRAD-PERSYST-UPR BioWooEB (FRA)
• Hamzeh Yahya, Université de Téhéran (IRN)
• Karimi Ali-Naghi, Université de Téhéran (IRN)
• Pizzi Antonio, ENSTIB (FRA)
• Pourtahmasi Kambiz, Université de Téhéran (IRN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/580970/)

Métriques

[ Page générée et mise en cache le 2024-12-17 ]