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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
Chalmers University of Technology, Sweden.
RISE Research Institutes of Sweden, Materials and Production, Chemistry, Biomaterials and Textiles.ORCID iD: 0000-0002-2513-4289
RISE Research Institutes of Sweden, Materials and Production, Chemistry, Biomaterials and Textiles.ORCID iD: 0000-0003-2893-8554
Graz University of Technology, Austria.
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2021 (English)In: Carbohydrate Polymers, ISSN 0144-8617, E-ISSN 1879-1344, Vol. 254, article id 117293Article in journal (Refereed) Published
Abstract [en]

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. © 2020 The Author(s)

Place, publisher, year, edition, pages
Elsevier Ltd , 2021. Vol. 254, article id 117293
Keywords [en]
Carbon fibers, Composite, Fiber, Lignin, Molecular orientation distribution, Regenerated cellulose, Rotor synchronized magic-angle spinning, Solid-state NMR, Wood, X-ray scattering, Cellulose, Cost reduction, Creep resistance, Fibers, Graphite fibers, Molecular orientation, Nuclear magnetic resonance spectroscopy, Wind power, X ray scattering, Associated costs, Automobile manufacturing, Carbon fiber precursors, Environmentally benign, Lightweight materials, Orientation distributions, Polyacrylonitrile precursors, Solid state nuclear magnetic resonance spectroscopy
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Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-51212DOI: 10.1016/j.carbpol.2020.117293Scopus ID: 2-s2.0-85097064942OAI: oai:DiVA.org:ri-51212DiVA, id: diva2:1515016
Note

Funding details: Energimyndigheten; Funding text 1: This work has been carried out within the framework of the Avancell Centre for Fibre Engineering and financially supported by “Södra Skogsägarna Foundation for Research, Development and Education” and “Stiftelsen Nils och Dorthi Troëdssons forskningsfond”. JB, KJ and HT gratefully acknowledge project “LightFibre” financed by Energimyndigheten. The NMR measurements were carried out at the Swedish NMR Centre, Göteborg, Sweden and at the NMR Core Facility at Umeå University, Sweden, with the assistance of Tobias Sparrman. Warm thanks to Petri Henrik Murto for handy camera work. Isabell Sarstedt is greatly acknowledged for the scientific art.

Available from: 2021-01-07 Created: 2021-01-07 Last updated: 2023-05-22Bibliographically approved

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Bengtsson, JennyJedvert, Kerstin

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