Nanofibrillar networks enable universal assembly of superstructured particle constructs

B. D. Mattos, B. L. Tardy*, L. G. Greca, T. Kämäräinen, W. Xiang, O. Cusola, W. L.E. Magalhães, O. J. Rojas

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Superstructured colloidal materials exploit the synergies between components to develop new or enhanced functions. Cohesion is a primary requirement for scaling up these assemblies into bulk materials, and it has only been fulfilled in case-specific bases. Here, we demonstrate that the topology of nanonetworks formed from cellulose nanofibrils (CNFs) enables robust superstructuring with virtually any particle. An intermixed network of fibrils with particles increases the toughness of the assemblies by up to three orders of magnitude compared, for instance, to sintering. Supramolecular cohesion is transferred from the fibrils to the constructs following a power law, with a constant decay factor for particle sizes from 230 nm to 40 μm. Our findings are applicable to other nanofiber dimensions via a rationalization of the morphological aspects of both particles and nanofibers. CNF-based cohesion will move developments of functional colloids from laboratory-scale toward their implementation in large-scale nanomanufacturing of bulk materials.

Original languageEnglish
Article numbereaaz7328
JournalScience Advances
Volume6
Issue number19
DOIs
Publication statusPublished - May 2020
MoE publication typeA1 Journal article-refereed

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