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Oxidative stabilisation of kraft lignin for carbon fibre production
RISE, Innventia.
RISE, SP – Sveriges Tekniska Forskningsinstitut, SP Sveriges tekniska forskningsinstitut, YKI – Ytkemiska institutet.ORCID iD: 0000-0003-3695-1150
RISE, Innventia.
RISE, Innventia.ORCID iD: 0000-0002-4858-7352
2012 (English)In: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, no 2, p. 141-147Article in journal (Refereed) Published
Abstract [en]

With the aim of investigating kraft lignin as a raw material for carbon fibre production, different lignins have been stabilised in air at conditions varied according to a full factorial experimental design. The lignins under examination were purified kraft lignin powders originating from birch, spruce/pine and Eucalyptus globules, as well as lignin fibres originating from birch with 5 poly(ethylene oxide) (PEO) added as a plasticiser. The influence of temperature, time and heating rate on yield and glass-transition temperature (Tg) was investigated. The highest yield was achieved after stabilisation at 280°C during 2h with a heating rate of 0.2°C min -1. The Tg of all lignin powders was increased when stabilisation occurred under harsher conditions. X-ray photoelectron spectroscopy analysis (XPS) of both the outer surface and the cleaved cross-section of individual lignin/PEO fibres showed a clear gradient in the degree of chemical modification, with the major change occurring on the surface resulting in the appearance of a skin-core structure after stabilisation. The behaviour of the lignin fibres during stabilisation is similar to that of pitch-based fibres, indicating good possibilities for lignin as raw material for carbon fibre production.

Place, publisher, year, edition, pages
2012. no 2, p. 141-147
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Other Materials Engineering Organic Chemistry
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URN: urn:nbn:se:ri:diva-9755DOI: 10.1515/HF.2011.133Scopus ID: 2-s2.0-84860606788OAI: oai:DiVA.org:ri-9755DiVA, id: diva2:968531
Available from: 2016-09-12 Created: 2016-09-12 Last updated: 2019-07-31Bibliographically approved

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Ernstsson, MarieSjöholm, Elisabeth

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