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Variation in the hierarchical structure of lignin-blended cellulose precursor fibers
ESRF European Synchrotron Radiation Facility, France.
RISE Research Institutes of Sweden, Materials and Production, Polymeric Materials and Composites.ORCID iD: 0000-0002-2513-4289
RISE Research Institutes of Sweden, Bioeconomy and Health, Material and Surface Design.ORCID iD: 0000-0002-9663-7705
ESRF European Synchrotron Radiation Facility, France.
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2023 (English)In: International Journal of Biological Macromolecules, ISSN 0141-8130, E-ISSN 1879-0003, Vol. 225, p. 1555-Article in journal (Refereed) Published
Abstract [en]

Regenerated cellulose fibers have been considered as potential precursor fibers for carbon fibers because of their balanced cost and performance. Increased attention has been paid to blending lignin with the regenerated cellulose to generate precursor fibers which render good mechanical properties and higher carbon yield. The mechanical properties of carbon fibers have been found closely correlated to the structure of precursor fibers. However, the effects of lignin blending on molecular- and morphological structure of the precursor are still unclear. This study aims at clarifying the structural information of lignin–cellulose precursor fibers from molecular level to mesoscale by scanning X-ray microdiffraction. We present the existence of a skin–core morphology for all the precursor fibers. Increase of lignin content in precursor fiber could reduce the portion of skin and cause obvious disorder of the meso- and molecular structure. By correlating structural variations with lignin blending, 30% lignin blending has been found as a potential balance point to obtain precursor fibers maintaining structural order together with high yield rate. 

Place, publisher, year, edition, pages
Elsevier B.V. , 2023. Vol. 225, p. 1555-
Keywords [en]
Hierarchical structure, Lignin-cellulose precursor fibers, Scanning X–ray microdiffraction
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-61554DOI: 10.1016/j.ijbiomac.2022.11.211Scopus ID: 2-s2.0-85143173213OAI: oai:DiVA.org:ri-61554DiVA, id: diva2:1720361
Note

 Funding details: Vetenskapsrådet, VR, 2018-06378; Funding text 1: Vinnova is gratefully acknowledged for financial support, grant nr. 2020-00831 . We gratefully thank Dr. Hanna Ulmefors for her productive comments on our paper. S.Y. acknowledge Swedish Research Council (VR) financial support nr. 2018-06378 . This is an ID13 inhouse project.

Available from: 2022-12-19 Created: 2022-12-19 Last updated: 2023-07-03Bibliographically approved

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Bengtsson, JennyYu, ShunJedvert, Kerstin

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