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The challenge of predicting spinnability : Investigating benefits of adding lignin to cellulose solutions in air-gap spinning
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- Bengtsson, Jenny (author)
- RISE,Kemi, biomaterial och textil,Chalmers University of Technology, Sweden,Chalmers tekniska högskola,RISE Research Institutes of Sweden
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- Jedvert, Kerstin (author)
- RISE,Kemi, biomaterial och textil,RISE Research Institutes of Sweden
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- Köhnke, Tobias (author)
- RISE,Kemi, biomaterial och textil,RISE Research Institutes of Sweden
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- (creator_code:org_t)
- 2021-02-23
- 2021
- English.
- In: Journal of Applied Polymer Science. - : John Wiley and Sons Inc. - 0021-8995 .- 1097-4628. ; 138:26
- Journal article (peer-reviewed)
Abstract
Subject headings
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- In this study, the underlying mechanism for improved spinnability when mixing lignin and cellulose in solution was investigated. Co-processing of lignin and cellulose has previously been identified as a potential route for production of inexpensive and bio-based carbon fibers. The molecular order of cellulose contributes to the strength of the fibers and the high carbon content of lignin improves the yield during conversion to carbon fibers. The current work presents an additional benefit of combining lignin and cellulose; solutions that contain both lignin and cellulose could be air-gap spun at substantially higher draw ratios than pure cellulose solutions, that is, lignin improved the spinnability. Fibers were spun from solutions containing different ratios of lignin, from 0 to 70 wt%, and the critical draw ratio was determined at various temperatures of solution. The observations were followed by characterization of the solutions with shear and elongational viscosity and surface tension, but none of these methods could explain the beneficial effect of lignin on the spinnability. However, by measuring the take-up force it was found that lignin seems to stabilize against diameter fluctuations during spinning, and plausible explanations are discussed
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Polymerteknologi (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Polymer Technologies (hsv//eng)
- NATURVETENSKAP -- Kemi -- Annan kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Other Chemistry Topics (hsv//eng)
Keyword
- cellulose and other wood products
- extrusion
- rheology
- Cellulose
- Fibers
- Graphite fibers
- Shear flow
- Spinning (fibers)
- Beneficial effects
- Cellulose solutions
- Coprocessing
- Diameter fluctuations
- Elongational viscosity
- High carbon content
- Molecular ordering
- Pure cellulose
- Lignin
Publication and Content Type
- ref (subject category)
- art (subject category)
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