木造建築における有害な接着剤を代替できるエコ・グルー(Eco-glue can replace harmful adhesives in wood construction)


迅速かつエネルギー効率の高い製造工程により、強度が高く、無害で、耐火性のある接着剤が生まれ、フィンランドのバイオ経済にとって大きなチャンスとなった。 A fast and energy-efficient manufacturing process results in a strong, non-toxic and fire-resistant adhesive—and a great opportunity for the Finnish bioeconomy.

2022-08-10 フィンランド・アールト大学



界面活性剤とリグニンナノ粒子による強力な耐火・耐水複合接着剤の開発 Interfacial catalysis and lignin nanoparticles for strong fire- and water-resistant composite adhesives

K. Alexander Henn, Susanna Forssell,  Antti Pietiläinen, Nina Forsman, Ira Smal, Paula Nousiainen, Rahul Prasad Bangalore Ashok, Pekka Oinas  and  Monika Österberg
Green Chemistry  Published:01 Aug 2022


Wood is increasingly replacing concrete to reduce CO2 emissions in buildings, but fossil-based adhesives are still being used in wood panels. Epoxidized lignin adhesives could be a potential replacement, but their preparation has so far required low-molecular weight lignin and long reaction times. Here we show a new efficient method to produce epoxidized kraft lignin (EKL) from regular kraft lignin by using interfacial catalysis. We demonstrate that EKL combined with biocolloids in the form of lignin nanoparticles (LNPs) produces a strong adhesive comparable to commercially available ones when cross-linked at 130–160 °C for only 3–5 minutes. The adhesive was free of phenol or formaldehyde, had a lignin content of over 80% and still showed impressive wet strength and incredible thermal stability. The process was shown to be scalable and environmentally more sustainable than resins from fossil-based feedstock or currently available ones from renewable resources.