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Mass transport and yield during spinning oflignin-cellulose carbon fiber precursors
RISE - Research Institutes of Sweden, Bioekonomi, Biobaserade material. Chalmers University of Technology, Sweden.ORCID-id: 0000-0002-2513-4289
RISE - Research Institutes of Sweden, Material och produktion, IVF.ORCID-id: 0000-0003-2893-8554
RISE - Research Institutes of Sweden, Material och produktion, IVF.ORCID-id: 0000-0002-6498-7022
RISE - Research Institutes of Sweden, Material och produktion, IVF.ORCID-id: 0000-0003-1259-6414
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2019 (Engelska)Ingår i: Holzforschung, ISSN 0018-3830, E-ISSN 1437-434X, Vol. 73, nr 5, s. 509-516Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Lignin, a substance considered as a residue in biomass and ethanol production, has been identified as a renewable resource suitable for making inexpensive carbon fibers (CFs), which would widen the range of possible applications for light-weight CFs reinforced composites. Wet spinning of lignin-cellulose ionic liquid solutions is a promising method for producing lignin-based CFs precursors. However, wet-spinning solutions containing lignin pose technical challenges that have to be solved to enable industrialization. One of these issues is that a part of the lignin leaches into the coagulation liquid, which reduces yield and might complicate solvent recovery. In this work, the mass transport during coagulation is studied in depth using a model system and trends are confirmed with spinning trials. It was discovered that during coagulation, efflux of ionic liquid is not hindered by lignin concentration in solution and the formed cellulose network will enclose soluble lignin. Consequently, a high total concentration of lignin and cellulose in solution is advantageous to maximize yield. This work provides a fundamental understanding on mass transport during coagulation of lignin-cellulose solutions, crucial information when designing new solution-based fiber forming processes.

Ort, förlag, år, upplaga, sidor
2019. Vol. 73, nr 5, s. 509-516
Nyckelord [en]
biomass; carbon fiber; ionic liquids; lignin; wet spinning
Nationell ämneskategori
Materialkemi
Identifikatorer
URN: urn:nbn:se:ri:diva-37686DOI: 10.1515/hf-2018-0246OAI: oai:DiVA.org:ri-37686DiVA, id: diva2:1284206
Tillgänglig från: 2019-01-31 Skapad: 2019-01-31 Senast uppdaterad: 2019-07-01Bibliografiskt granskad

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Bengtsson, JennyJedvert, KerstinHedlund, ArturKöhnke, Tobias

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