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Disassociated molecular orientation distributions of a composite cellulose-lignin carbon fiber precursor: A study by rotor synchronized NMR spectroscopy and X-ray scattering.

Authors :
Svenningsson L
Bengtsson J
Jedvert K
Schlemmer W
Theliander H
Evenäs L
Source :
Carbohydrate polymers [Carbohydr Polym] 2021 Feb 15; Vol. 254, pp. 117293. Date of Electronic Publication: 2020 Nov 08.
Publication Year :
2021

Abstract

Cellulose-lignin composite carbon fibers have shown to be a potential environmentally benign alternative to the traditional polyacrylonitrile precursor. With the associated cost reduction, cellulose-lignin carbon fibers are an attractive light-weight material for, e.g. wind power and automobile manufacturing. The carbon fiber tenacity, tensile modulus and creep resistance is in part determined by the carbon content and the molecular orientation distribution of the precursor. This work disassociates the molecular orientation of different components in cellulose-lignin composite fibers using rotor-synchronized solid-state nuclear magnetic resonance spectroscopy and X-ray scattering. Our results show that lignin is completely disordered, in a mechanically stretched cellulose-lignin composite fiber, while the cellulose is ordered. In contrast, the native spruce wood raw material displays both oriented lignin and cellulose. The current processes for fabricating a cellulose-lignin composite fiber cannot regain the oriented lignin as observed from the native wood.<br /> (Copyright © 2020 The Author(s). Published by Elsevier Ltd.. All rights reserved.)

Details

Language :
English
ISSN :
1879-1344
Volume :
254
Database :
MEDLINE
Journal :
Carbohydrate polymers
Publication Type :
Academic Journal
Accession number :
33357862
Full Text :
https://doi.org/10.1016/j.carbpol.2020.117293