Coaxial spinning of all-cellulose systems for enhanced toughness: filaments of oxidized nanofibrils sheathed in cellulose II regenerated from a protic ionic liquid

Guillermo Reyes, Meri Lundahl, Serguei Alejandro-Martin, Luis Arteaga-Perez, Claudia Oviedo, Alistair King, Orlando J. Rojas

Forskningsoutput: TidskriftsbidragArtikelVetenskapligPeer review

Sammanfattning

Hydrogels of TEMPO-oxidized nanocellulose were stabilized for dry-jet wet spinning using a shell of cellulose dissolved in 1,5-diazabicyclo[4.3.0]non-5-enium propionate ([DBNH][CO2Et]), a protic ionic liquid (PIL). Coagulation in an acidic water bath resulted in continuous core-shell filaments (CSFs) that were tough and flexible with an average dry (and wet) toughness of similar to 11 (2) MJ.m(-3) and elongation of similar to 9 (14) %. The CSF morphology, chemical composition, thermal stability, crystallinity, and bacterial activity were assessed using scanning electron microscopy with energy-dispersive X-ray spectroscopy, liquid-state nuclear magnetic resonance, Fourier transform infrared spectroscopy, thermogravimetric analysis, pyrolysis gas chromatography-mass spectrometry, wide-angle X-ray scattering, and bacterial cell culturing, respectively. The coaxial wet spinning yields PIL-free systems carrying on the surface the cellulose II polymorph, which not only enhances the toughness of the filaments but facilities their functionalization.

Originalspråkengelska
TidskriftBiomacromolecules
Volym21
Utgåva2
Sidor (från-till)878-891
Antal sidor14
ISSN1525-7797
DOI
StatusPublicerad - feb 2020
MoE-publikationstypA1 Tidskriftsartikel-refererad

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