Affiliation:
1. VTT Technical Research Centre of Finland Ltd., Tietotie 2, 02150 Espoo, Finland
Abstract
The purpose of this study was to elucidate the structures and functional properties of tannin- and lignin-derived nano- and microparticles and the coatings prepared from them. Nanoparticles prepared from technical lignins and water-insoluble tannin obtained from softwood bark showed large differences in the suspension testing of antibacterial efficacy against methicillin-resistant Staphylococcus aureus (MRSA) bacteria. A common factor among the most effective lignin nanoparticles was a relatively low molar mass of the lignin, but that alone did not guarantee high efficacy. Tannin nanoparticles showed good antibacterial activity both in suspension testing and as coatings applied onto cellulose. The nanoparticles of nitrogen-modified tannin and the small microparticles of nitrogen-modified kraft lignin exhibited promising flame-retardant parameters when applied as coatings on cellulose. These results illustrate the potential of nano- and microsized particles of unmodified and chemically modified polyphenols to provide functional coatings to cellulosic substrates for environments and applications with high hygiene and fire safety requirements.
Subject
Polymers and Plastics,General Chemistry
Reference37 articles.
1. Gigante, V., Panariello, L., Coltelli, M.-B., Danti, S., Obisesan, K.A., Hadrich, A., Staebler, A., Chierici, S., Canesi, I., and Lazzeri, A. (2021). Liquid and solid functional bio-based coatings. Polymers, 13.
2. Towards lignin-based functional materials in a sustainable world;Kai;Green Chem.,2016
3. High value valorization of lignin as environmental benign antimicrobial;Chen;Mater. Today Bio.,2023
4. Alkaline extraction of polyphenols for valorization of industrial spruce bark;Borrega;Bioresour. Technol. Rep.,2022
5. Review on tannins: Extraction processes, applications and possibilities;Das;S. Afr. J. Bot.,2020
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