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A new softening agent for melt spinning of softwood kraft lignin
Innventia AB, SE-114 86 Stockholm, Sweden.
Innventia AB, SE-114 86 Stockholm, Sweden.
Innventia AB, SE-114 86 Stockholm, Sweden.
Innventia AB, SE-114 86 Stockholm, Sweden.
2013 (English)In: Journal of Applied Polymer Science, ISSN 0021-8995, E-ISSN 1097-4628, Vol. 129, no 3, p. 1274-1279Article in journal (Refereed) Published
Abstract [en]

Kraft lignin obtained from the pulping of wood is an interesting new precursor material for carbon fiber production because of its high carbon content and ready availability. However, continuous spinning of softwood kraft lignin (SKL) has been impossible because of its insufficient softening characteristics and neat hardwood kraft lignin (HKL) has required extensive pretreatments to enable fiber formation. Softwood kraft lignin permeate (SKLP) and hardwood kraft lignin permeate (HKLP), fractionated by membrane filtration, were continuously melt spun into fibers. To improve the spinnability of SKL and HKL, HKLP was added as a softening agent. SKL- and HKL-based fibers were obtained by adding 3–98 wt % HKLP. A suitable temperature range for spinning was 20–85°C above the Tg of the lignin samples, and this range gave a flawless appearance according to the SEM analysis. Smooth, homogeneous fibers of SKLP, HKLP, and SKL with HKLP were successfully processed into solid carbon fibers

Place, publisher, year, edition, pages
2013. Vol. 129, no 3, p. 1274-1279
National Category
Composite Science and Engineering
Research subject
Polymeric Composite Materials
Identifiers
URN: urn:nbn:se:ltu:diva-10233DOI: 10.1002/app.38795Local ID: 8ff799dc-0521-49fc-ab31-561f4c396de9OAI: oai:DiVA.org:ltu-10233DiVA, id: diva2:983173
Note
Upprättat; 2013; 20121116 (ylvnor)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Nordström, Ylva

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