A CaCO3/nanocellulose-based bioinspired nacre-like material. Issue 31 (6th February 2017)

• Record Type: Journal Article
• Authors: Farhadi-Khouzani, Masoud; Schütz, Christina; Durak, Grażyna M.; Fornell, Jordina; Sort, Jordi; Salazar-Alvarez, Germán; Bergström, Lennart; Gebauer, Denis
• Is Part Of: Journal of materials chemistry. Volume 5:Issue 31(2017)
• Page Start: 16128
• Page End: 16133
• Publication Date: 2017-02-06
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6ta09524k
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : The controlled wettability of liquid calcium carbonate precursors on nanocellulose yields a nacre-like material with plasticity outperforming a biological example. Abstract : 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 pre-deposited 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 nacre-like 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.