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A CaCO3/nanocellulose-based bioinspired nacre-like material
Stockholm University, Faculty of Science, Department of Materials and Environmental Chemistry (MMK). Wallenberg Wood Science Center, Sweden.
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Number of Authors: 82017 (English)In: Journal of Materials Chemistry A, ISSN 2050-7488, Vol. 5, no 31, p. 16128-16133Article in journal (Refereed) Published
Abstract [en]

Nacre continues to be an inspiration for the fabrication of strong and tough materials from renewable and earth-abundant raw materials. Herein, we showed how a nacre-like hybrid material based on nanocellulose (NC) and CaCO3 can be prepared via the sequential infiltration of polymer-stabilised CaCO3 liquid precursors into layers of predeposited NC films. Layer-by-layer assembly of the NC films followed by controlled spreading and infiltration with liquid CaCO3 precursors generated a lamellar material with an architecture and iridescent appearance similar to those of nacre. The wettability of the NC films towards the liquid CaCO3 precursors was controlled by hydroxyl and carboxyl functionalization of the NC fibrils and the addition of magnesium ions. The combination of a high stiffness and plasticity of the nacre-like NC/CaCO3 hybrid materials show that excellent mechanical properties can be obtained employing a fibrillar organic constituent that is relatively hard. The fabrication of a nacrelike hybrid material via an aqueous route of assembly and infiltration processing demonstrates how a sustainable composite material with outstanding properties can be produced using the most abundant biopolymer and biomineral on earth.

Place, publisher, year, edition, pages
2017. Vol. 5, no 31, p. 16128-16133
National Category
Chemical Sciences Environmental Engineering Materials Engineering
Identifiers
URN: urn:nbn:se:su:diva-147070DOI: 10.1039/c6ta09524kISI: 000407167700007OAI: oai:DiVA.org:su-147070DiVA, id: diva2:1142321
Available from: 2017-09-19 Created: 2017-09-19 Last updated: 2017-09-19Bibliographically approved

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Salazar-Alvarez, GermanBergström, Lennart
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