Quebracho Tannin Bio-Based Adhesives for Plywood

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F22%3A43921741" target="_blank" >RIV/62156489:43410/22:43921741 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.3390/polym14112257" target="_blank" >https://doi.org/10.3390/polym14112257</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/polym14112257" target="_blank" >10.3390/polym14112257</a>

Result language

angličtina

Original language name

Quebracho Tannin Bio-Based Adhesives for Plywood

Original language description

Wood-based products are traditionally bonded with synthetic adhesives. Resources availability and ecological concerns have drawn attention to bio-based sources. The use of tannin-based adhesives for engineered wood products has been known for decades, however, these formulations were hardly used for the gluing of solid wood because their rigidity involved low performance. In this work, a completely bio-based formulation consisting of Quebracho (Schinopsis balancae) extract and furfural is characterized in terms of viscosity, gel time, and FT-IR spectroscopy. Further, the usability as an adhesive for beech (Fagus sylvatica) plywood with regard to press parameters (time and temperature) and its influence on physical (density and thickness) and mechanical properties (modulus of elasticity, modulus of rupture and tensile shear strength) were determined. These polyphenolic adhesives presented non-Newtonian behavior but still good spreading at room temperature as well as evident signs of crosslinking when exposed to 100 degrees C. Within the press temperature, a range of 125 degrees C to 140 degrees C gained suitable results with regard to mechanical properties. The modulus of elasticity of five layered 10 mm beech plywood ranged between 9600 N/mm(2) and 11,600 N/mm(2), respectively, with 66 N/mm(2) to 100 N/mm(2) for the modulus of rupture. The dry state tensile shear strength of similar to 2.2 N/mm(2) matched with other tannin-based formulations, but showed delamination after 24 h of water storage. The proposed quebracho tannin-furfural formulation can be a bio-based alternative adhesive for industrial applicability for special plywood products in a dry environment, and it offers new possibilities in terms of recyclability.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20502 - Paper and wood

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2022

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Polymers

ISSN

2073-4360

e-ISSN

2073-4360

Volume of the periodical

14

Issue of the periodical within the volume

11

Country of publishing house

CH - SWITZERLAND

Number of pages

14

Pages from-to

2257

UT code for WoS article

000808745000001

EID of the result in the Scopus database

2-s2.0-85131711822