Projects per year
Abstract
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.
Original language | English |
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Pages (from-to) | 6487-6500 |
Journal | Green Chemistry |
Volume | 24 |
Issue number | 17 |
Early online date | 1 Aug 2022 |
DOIs | |
Publication status | Published - 7 Sept 2022 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Interfacial catalysis and lignin nanoparticles for strong fire- and water-resistant composite adhesives'. Together they form a unique fingerprint.Projects
- 3 Finished
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LignoSphere, Bioproducts
Österberg, M. (Principal investigator)
01/06/2019 → 30/04/2022
Project: Business Finland: New business from research ideas (TUTLI)
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FinnCERES: Competence Center for the Materials Bioeconomy: A Flagship for our Sustainable Future
Mäkelä, K. (Principal investigator)
01/05/2018 → 31/12/2022
Project: Academy of Finland: Other research funding
Press/Media
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Eco-Glue Can Replace Harmful Adhesives in Wood Construction
10/08/2022 → 02/09/2022
7 items of Media coverage
Press/Media: Media appearance
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An Eco-Friendly Alternative for Adhesives
11/08/2022
1 item of Media coverage
Press/Media: Media appearance