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.
- Cellulose nanocrystal
- Liquid crystal
- Nanocomposite fiber
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, 112, 334-345. https://doi.org/10.1016/j.eurpolymj.2018.12.035