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Research article - Peer-reviewed, 2022

Self-assembly of ferria-nanocellulose composite fibres

Breijaert, T. C.; Daniel, G.; Hedlund, D.; Svedlindh, P.; Kessler, V. G.; Granberg, H.; Hakansson, K.; Seisenbaeva, G. A.;

Abstract

An environmentally benign synthesis of a magnetically responsive carboxymethylated cellulose nanofibril-based material is reported. Applied experimental conditions lead to the in-situ formation of magnetite nanoparticles with primary particle sizes of 2.0-4.0 nm or secondary particles of 3.6-16.4 nm depending on whether nucleation occurred between individual carboxymethylated cellulose nanofibrils, or on exposed fibril surfaces. The increase in magnetite particle size on the cellulose fibril surfaces was attributed to Ostwald ripening, while the small particles formed within the carboxymethyl cellulose aggregates were presumably due to steric interactions. The magnetite nanoparticles were capable of coordinating to carboxymethylated cellulose nanofibrils to form large "fibre-like" assemblies. The confinement of small particles within aggregates of reductive cellulose molecules was most likely responsible for excellent conservation of magnetic characteristics on storage of this material. The possibility for using the material in drug delivery applications with release rate controlled by daylight illumination is presented.

Keywords

Nanocellulose; Magnetite; Magnetic composites; Hybrid materials; Photo-induced drug delivery

Published in

Carbohydrate Polymers

2022, volume: 291, article number: 119560
Publisher: ELSEVIER SCI LTD

Authors' information

Swedish University of Agricultural Sciences, Department of Molecular Sciences
Swedish University of Agricultural Sciences, Department of Forest Biomaterials and Technology
Hedlund, D.
Uppsala University
Svedlindh, P.
Uppsala University
Swedish University of Agricultural Sciences, Department of Molecular Sciences
Granberg, H.
RISE Research Institutes of Sweden
Hakansson, K.
RISE Research Institutes of Sweden
Swedish University of Agricultural Sciences, Department of Molecular Sciences

UKÄ Subject classification

Materials Chemistry
Polymer Chemistry

Publication Identifiers

DOI: https://doi.org/10.1016/j.carbpol.2022.119560

URI (permanent link to this page)

https://res.slu.se/id/publ/117394