1. Functionalization and patterning of nanocellulose films by surface-bound nanoparticles of hydrolyzable tannins and multivalent metal ions
- Author
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Malin Wohlert, Mama Pléa, Jakob Wohlert, Christina Schütz, Zoltán Bacsik, Wei Xia, Mukta V. Limaye, Konstantin Kriechbaum, Lennart Bergström, German Salazar-Alvarez, and Cheick Dembele
- Subjects
Solid-state chemistry ,Metal ions in aqueous solution ,Hydrolyzable Tannin ,Nanoparticle ,Materialkemi ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Nanocellulose ,Metal ,Adsorption ,Chemical engineering ,visual_art ,visual_art.visual_art_medium ,Materials Chemistry ,Surface modification ,General Materials Science ,0210 nano-technology - Abstract
Inspired by the Bogolanfini dyeing technique, we report how flexible nanofibrillated cellulose (CNF) films can be functionalized and patterned by surface-bound nanoparticles of hydrolyzable tannins and multivalent metal ions with tunable colors. Molecular dynamics simulations show that gallic acid (GA) and ellagic acid (EA) rapidly adsorb and assemble on the CNF surface, and atomic force microscopy confirms that nanosized GA assemblies cover the surface of the CNF. CNF films were patterned with tannin-metal ion nanoparticles by an in-fibre reaction between the pre-impregnated tannin and the metal ions in the printing ink. Spectroscopic studies show that the Fe-III/II ions interact with GA and form surface-bound, stable GA-Fe-III/II nanoparticles. The functionalization and patterning of CNF films with metal ion-hydrolyzable tannin nanoparticles is a versatile route to functionalize films based on renewable materials and of interest for biomedical and environmental applications.
- Published
- 2019