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Self-assembly of ferria – nanocellulose composite fibres
SLU Swedish University of Agricultural Sciences, Sweden.
SLU Swedish University of Agricultural Sciences, Sweden.
Uppsala University, Sweden.
Uppsala University, Sweden.
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2022 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 291, article id 119560Article in journal (Refereed) Published
Abstract [en]

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. © 2022 The Author(s)

Place, publisher, year, edition, pages
Elsevier Ltd , 2022. Vol. 291, article id 119560
Keywords [en]
Hybrid materials, Magnetic composites, Magnetite, Nanocellulose, Photo-induced drug delivery, Aggregates, Controlled drug delivery, Magnetic storage, Magnetite nanoparticles, Nanofibers, Nanomagnetics, Ostwald ripening, Particle size, Self assembly, Targeted drug delivery, Carboxymethylated cellulose, Cellulose nanofibrils, Composite fibres, Environmentally benign synthesis, Hybrids material, Nano-cellulose, Photo-induced, Small particles
National Category
Polymer Technologies
Identifiers
URN: urn:nbn:se:ri:diva-59208DOI: 10.1016/j.carbpol.2022.119560Scopus ID: 2-s2.0-85129742919OAI: oai:DiVA.org:ri-59208DiVA, id: diva2:1667405
Note

Funding details: Vetenskapsrådet, VR; Funding details: Sveriges Lantbruksuniversitet, SLU; Funding text 1: The authors express their gratitude to the Swedish Research Council STINT for support of the grant Nanocellulose Based Materials for Environmental and Theranostic Applications and to the Faculty of Natural Resources and Agricultural Sciences, SLU for support of TB PhD position.

Available from: 2022-06-10 Created: 2022-06-10 Last updated: 2023-05-23Bibliographically approved

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Granberg, HjalmarHåkansson, Karl

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