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Issue 41, 2019
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Functionalization and patterning of nanocellulose films by surface-bound nanoparticles of hydrolyzable tannins and multivalent metal ions

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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 FeIII/II ions interact with GA and form surface-bound, stable GA–FeIII/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.

Graphical abstract: Functionalization and patterning of nanocellulose films by surface-bound nanoparticles of hydrolyzable tannins and multivalent metal ions

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Supplementary files

Article information


Submitted
15 May 2019
Accepted
10 Jul 2019
First published
15 Jul 2019

This article is Open Access

Nanoscale, 2019,11, 19278-19284
Article type
Communication

Functionalization and patterning of nanocellulose films by surface-bound nanoparticles of hydrolyzable tannins and multivalent metal ions

M. V. Limaye, C. Schütz, K. Kriechbaum, J. Wohlert, Z. Bacsik, M. Wohlert, W. Xia, M. Pléa, C. Dembele, G. Salazar-Alvarez and L. Bergström, Nanoscale, 2019, 11, 19278
DOI: 10.1039/C9NR04142G

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