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The impact of inorganic elements on lignin‐based carbon fibre quality
RISE - Research Institutes of Sweden, Bioeconomy, Biobased Materials.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy. KTH Royal institute of technology, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, Biorefinery and Energy.
RISE - Research Institutes of Sweden, Bioeconomy, Papermaking and Packaging.ORCID iD: 0000-0003-4564-2544
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2018 (English)In: 15th European workshop on lignocelllulosics and pulp: Proceedings for poster presentations, 2018, p. 119-122Conference paper, Poster (with or without abstract) (Other academic)
Abstract [en]

The influence of inorganic elements on lignin ‐based carbon fibre (CF) quality was studied using sulphates of Na +, K+, Mg2+, Fe2+, Al3+. The metal sulphates were added to wet spun prefibres made from softwood kraft lignin (SKL):cellulose (70:30) and melt spun prefibres made from low molecular mass SKL. An increase in concentration from 0.1 w% to about 0.4 w% did neither affect the mechanical properties nor the morphology as observed by SEM. In contrast, metal sulphates added to the initial 0.45 w% to a total range 1.5 to 5.0 w%, was found detrimental to the melt spinning and to the final CF quality. Thus, the recommendation of <0.1 w% ash in kraft lignin may be exceeded, but more research is needed to establish the upper concentration limit.

Place, publisher, year, edition, pages
2018. p. 119-122
Keywords [en]
ash, carbon fibre, cellulose, inorganic elements, lignin
National Category
Paper, Pulp and Fiber Technology
Identifiers
URN: urn:nbn:se:ri:diva-35320OAI: oai:DiVA.org:ri-35320DiVA, id: diva2:1255977
Conference
15th European workshop on lignocelllulosics and pulp, June 26-29, 2018, Aveiro, Portugal
Funder
Swedish Energy AgencyAvailable from: 2018-10-15 Created: 2018-10-15 Last updated: 2018-11-15Bibliographically approved

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Sedin, MariaSjöholm, Elisabeth

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