Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility

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.

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| openaire: EC/H2020/742829/EU//DRIVEN

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Cellulose nanocrystal, Liquid crystal, Methylcellulose, Nanocomposite fiber, Toughness

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10.1016/j.eurpolymj.2018.12.035

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Hynninen, V, Mohammadi, P, Wagermaier, W, Hietala, S, Linder, M B, Ikkala, O & Nonappa 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

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https://urn.fi/URN:NBN:fi:aalto-201902252045

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[article-cris] Kemian tekniikan korkeakoulu / CHEM

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Methyl cellulose/cellulose nanocrystal nanocomposite fibers with high ductility

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