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Oxidative stabilisa...
Oxidative stabilisation of kraft lignin for carbon fibre production
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- Brodin, Ida, 1982- (författare)
- RISE,Innventia
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- Ernstsson, Marie (författare)
- RISE,YKI – Ytkemiska institutet
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- Gellerstedt, Göran (författare)
- RISE,Innventia
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- Sjöholm, Elisabeth, Associiate Professor (författare)
- RISE,Innventia
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(creator_code:org_t)
- Walter de Gruyter, 2012
- 2012
- Engelska.
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Ingår i: Holzforschung. - : Walter de Gruyter. - 0018-3830 .- 1437-434X. ; 66:2, s. 141-147
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- 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 280C during 2 h with a heating rate of 0.2C 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.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- carbon fibre
- differential scanning calorimetry
- experimental design
- kraft lignin
- lignin fibre
- stabilisation
- X-ray photoelectron spectroscopy
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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