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Directed self-assembly of silica nanoparticles in ionic liquid-spun cellulose fibers.
RISE - Research Institutes of Sweden, Materials and Production, IVF.ORCID iD: 0000-0002-7939-4684
RISE - Research Institutes of Sweden, Materials and Production, IVF.ORCID iD: 0000-0002-5212-780x
Chalmers University of Technology, Sweden.
Chalmers University of Technology, Sweden.
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2019 (English)In: Journal of Colloid and Interface Science, ISSN 0021-9797, E-ISSN 1095-7103, Vol. 553, p. 167-176, article id S0021-9797(19)30648-4Article in journal (Refereed) Published
Abstract [en]

The application range of man-made cellulosic fibers is limited by the absence of cost- and manufacturing-efficient strategies for anisotropic hierarchical functionalization. Overcoming these bottlenecks is therefore pivotal in the pursuit of a future bio-based economy. Here, we demonstrate that colloidal silica nanoparticles (NPs), which are cheap, biocompatible and easy to chemically modify, enable the control of the cross-sectional morphology and surface topography of ionic liquid-spun cellulose fibers. These properties are tailored by the silica NPs' surface chemistry and their entry point during the wet-spinning process (dope solution DSiO2 or coagulation bath CSiO2). For CSiO2-modified fibers, the coagulation mitigator dimethylsulphoxide allows for controlling the surface topography and the amalgamation of the silica NPs into the fiber matrix. For dope-modified fibers, we hypothesize that cellulose chains act as seeds for directed silica NP self-assembly. This results for DSiO2 in discrete micron-sized rods, homogeneously distributed throughout the fiber and for glycidoxy-surface modified DSiO2@GLYEO in nano-sized surface aggregates and a cross-sectional core-shell fiber morphology. Furthermore, the dope-modified fibers display outstanding strength and toughness, which are both characteristic features of biological biocomposites.

Place, publisher, year, edition, pages
2019. Vol. 553, p. 167-176, article id S0021-9797(19)30648-4
Keywords [en]
Biocomposites, Mechanical properties, Plasma-enhanced chemical vapor deposition, Surface topography, Wet-spinning
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-39064DOI: 10.1016/j.jcis.2019.05.084PubMedID: 31202053OAI: oai:DiVA.org:ri-39064DiVA, id: diva2:1331049
Available from: 2019-06-26 Created: 2019-06-26 Last updated: 2019-06-26Bibliographically approved

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Andersson Trojer, MarkusOlsson, Carina

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