Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility

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http://hdl.handle.net/10138/323532

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Hynninen , V , Mohammadi , P , Wagermaier , W , Hietala , S , Linder , M B , Ikkala , O & Nonappa , N 2019 , ' Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility ' , European Polymer Journal , vol. 112 , pp. 334-345 . https://doi.org/10.1016/j.eurpolymj.2018.12.035

Title: Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility
Author: Hynninen, Ville; Mohammadi, Pezhman; Wagermaier, Wolfgang; Hietala, Sami; Linder, Markus B.; Ikkala, Olli; Nonappa, Nonappa
Contributor: University of Helsinki, Department of Chemistry
Date: 2019-03
Language: eng
Number of pages: 12
Belongs to series: European Polymer Journal
ISSN: 0014-3057
URI: http://hdl.handle.net/10138/323532
Abstract: Methylcellulose/cellulose nanocrystal (MC/CNC) nanocomposite fibers showing high ductility and high modulus of toughness were prepared by a simple aqueous wet-spinning from corresponding nanocomposite hydrogels into ethanol coagulation bath followed by drying. The hydrogel MC aq. concentration was maintained at 1 wt-% while the CNC aq. loading was systematically varied in the range 0 – 3 wt-%. This approach resulted in MC/CNC fiber compositions from 25/75 wt-%/wt-% to 95/5 wt-%/wt-%. The optimal mechanical properties were achieved with the MC/CNC composition of 80/20 wt-%/wt-% allowing high strain (36.1 %) and modulus of toughness (48.3 MJ/m3), still keeping a high strength (190 MPa). Further, we demonstrate that the continuous spinning of MC/CNC fibers is potentially possible. The results indicate possibilities to spin MC-based highly ductile composite fibers from environmentally benign aqueous solvents.
Subject: Cellulose nanocrystal
Methylcellulose
Nanocomposite fiber
Liquid crystal
Toughness
116 Chemical sciences
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