RT Journal Article
T1 Sustainable non-isocyanate polyurethanes bio-adhesives for engineered wood panels are revealed as promising candidates to move from formaldehyde-based alternatives
A1 Arias Calvo, Ana
A1 Entrena-Barbero, Eduardo
A1 Feijoo Costa, Gumersindo
A1 Moreira Vilar, María Teresa
K1 Lignocellulosic waste streams valorization
K1 Bio-adhesives
K1 Life Cycle Assessment
K1 Wood bio-adhesives
K1 Agro-industrial streams valorization
AB The main driving forces on the development of eco-friendly wood adhesives are based on environmental sustainability, costs savings, recyclability, reusability and health benefits, in comparison with synthetic resins. Lignin, tannin, proteins and carbohydrates are the main renewable raw materials being studied. Taking as a premise the technical performance of different bio-based alternatives, in comparison with formaldehyde-based resins, it is necessary to evaluate the environmental profile of such products in order to assess the pros and cons. In this regard, this manuscript addresses the industrial-scale design and environmental evaluation, through the Life Cycle Assessment methodology, of four formaldehyde-free bio-adhesives. For this purpose, the use of renewable resources such as Organosolv (OSL) and kraft (KL) lignins, soy (SPI) and tannins (MT)), crosslinked and hardened with NIPU (non-isocyanate polyurethanes) were considered. The impact results obtained showed that OSL-NIPU bio-adhesive, with a single environmental score of 35.27 mPa, has the best environmental profile, followed by SPI-NIPU, with a value of 63.36 mPa. Therefore, both could be considered as potential substitutes for synthetic resins. On the other hand, it has been identified that hexamethylenediamine (HDMA), used as crosslinking agent for the formulation of the bio-adhesives, is one of the main hotspots of the environmental profiles of OSL, KL and MT NIPU bio-adhesives. In the case of SPI-NIPU adhesives, it is the soy protein isolation process that leads to a higher environmental contribution. Thus, future research should focus on trying to reduce the dose of HMDA and on improving the soy protein isolation process
PB Elsevier
YR 2022
FD 2022
LK http://hdl.handle.net/10347/27875
UL http://hdl.handle.net/10347/27875
LA eng
NO Journal of Environmental Chemical Engineering 10 (2022) 107053. https://doi.org/10.1016/j.jece.2021.107053
NO This research has been financially supported by ERA-CoBIOTECH project (PCI2018–092866) Programación Conjunta Internacional 2018-WOODBADH project. The authors belong to the Galician Competitive Research Group (GRC ED431C 2017/29) and to the Cross-disciplinary Research in Environmental Technologies (CRETUS Research Center, ED431E 2018/01)
DS Minerva
RD 26 abr 2026