@article{90ba5a3896b749599574f880e4810302,
title = "Close Packing of Cellulose and Chitosan in Regenerated Cellulose Fibers Improves Carbon Yield and Structural Properties of Respective Carbon Fibers",
abstract = "A low carbon yield is a major limitation for the use of cellulose-based filaments as carbon fiber precursors. The present study aims to investigate the use of an abundant biopolymer chitosan as a natural charring agent particularly on enhancing the carbon yield of the cellulose-derived carbon fiber. The ionic liquid 1,5-diazabicyclo[4.3.0]non-5-enium acetate ([DBNH]OAc) was used for direct dissolution of cellulose and chitosan and to spin cellulose-chitosan composite fibers through a dry-jet wet spinning process (Ioncell). The homogenous distribution and tight packing of cellulose and chitosan revealed by X-ray scattering experiments enable a synergistic interaction between the two polymers during the pyrolysis reaction, resulting in a substantial increase of the carbon yield and preservation of mechanical properties of cellulose fiber compared to other cobiopolymers such as lignin and xylan.",
author = "Hilda Zahra and Daisuke Sawada and Chamseddine Guizani and Yibo Ma and Shogo Kumagai and Toshiaki Yoshioka and Herbert Sixta and Michael Hummel",
note = "Funding Information: This project has received funding from the European Research Council (ERC) under the European Union{\textquoteright}s Horizon 2020 research and innovation programme (grant agreement no. 715788). The authors gratefully acknowledge: OtaNano-Nanomicroscopy Center (Aalto-NMC) for the use of XRD instrument; Graduate School of Environmental Studies (GSES) of Tohoku University for the use of the STA and FE-SEM instrument; Sauli Larkiala for the design of the sample holder for the SAXS; Dr. Isabelle Morfin for assistance at the D2AM beam line; and ESRF for the provision of beam time. HZ sincerely thanks Marja Rissanen, Kaisa Hytti, Shunsuke Kayamori for the support during tensile testing, elemental analysis and FE-SEM measurements, respectively. DS thanks Dr. Paavo Penttil{\"a} for valuable advice for the use of WoodSAS model. Publisher Copyright: Copyright {\textcopyright} 2020 American Chemical Society.",
year = "2020",
month = oct,
day = "12",
doi = "10.1021/acs.biomac.0c01117",
language = "English",
volume = "21",
pages = "4326--4335",
journal = "Biomacromolecules",
issn = "1525-7797",
publisher = "American Chemical Society",
number = "10",
}