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Wet Spinning of Flame-Retardant Cellulosic Fibers Supported by Interfacial Complexation of Cellulose Nanofibrils with Silica Nanoparticles
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.ORCID iD: 0000-0001-7178-5202
Chalmers University of Technology, Sweden.
RISE - Research Institutes of Sweden, Swerea, Swerea IVF.ORCID iD: 0000-0003-1259-6414
2017 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, no 44, p. 39069-39077Article in journal (Refereed) Published
Abstract [en]

The inherent flammability of cellulosic fibers limits their use in some advanced applications. This work demonstrates for the first time the production of flame-retardant macroscopic fibers from wood-derived cellulose nanofibrils (CNF) and silica nanoparticles (SNP). The fibers are made by extrusion of aqueous suspensions of anionic CNF into a coagulation bath of cationic SNP at an acidic pH. As a result, the fibers with a CNF core and a SNP thin shell are produced through interfacial complexation. Silica-modified nanocellulose fibers with a diameter of ca. 15 μm, a titer of ca. 3 dtex and a tenacity of ca. 13 cN tex–1 are shown. The flame retardancy of the fibers is demonstrated, which is attributed to the capacity of SNP to promote char forming and heat insulation on the fiber surface.

Place, publisher, year, edition, pages
2017. Vol. 9, no 44, p. 39069-39077
Keywords [en]
cellulose nanofibrils; flame-retardant fibers; nanocellulose; silica nanoparticles; wet spinning;
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-32704DOI: 10.1021/acsami.7b13466OAI: oai:DiVA.org:ri-32704DiVA, id: diva2:1157673
Available from: 2017-11-16 Created: 2017-11-16 Last updated: 2018-02-23Bibliographically approved

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Nechyporchuk, OleksandrKöhnke, Tobias
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