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Exploring the Effec...
Exploring the Effects of Different Cross-Linkers on Lignin-Based Thermoset Properties and Morphologies
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- Ribca, Iuliana, 1993- (författare)
- KTH,Ytbehandlingsteknik,Wallenberg Wood Science Center
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- Jawerth, Marcus (författare)
- KTH,Ytbehandlingsteknik,Wallenberg Wood Science Center
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- Brett, Calvin (författare)
- KTH,Ytbehandlingsteknik,Teknisk mekanik,Wallenberg Wood Science Center,Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
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- Lawoko, Martin (författare)
- KTH,Wallenberg Wood Science Center,Fiber- och polymerteknologi
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- Schwartzkopf, Matthias (författare)
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
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- Chumakov, Andrei (författare)
- Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
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- Roth, Stephan V. (författare)
- KTH,Ytbehandlingsteknik,Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
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- Johansson, Mats (författare)
- KTH,Ytbehandlingsteknik,Wallenberg Wood Science Center
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(creator_code:org_t)
- 2021-01-14
- 2021
- Engelska.
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Ingår i: ACS Sustainable Chemistry and Engineering. - : American Chemical Society (ACS). - 2168-0485. ; 9:4, s. 1692-1702
- Relaterad länk:
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https://doi.org/10.1...
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https://kth.diva-por... (primary) (Raw object)
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https://pubs.acs.org...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- The search for sustainable material solutions has put lignin as one of the prime candidates for aromatic building blocks in macromolecular materials. The present study aimed to demonstrate how lignin-based thermoset resins can be utilized in combination with different cross-linkers. Kraft lignin was used to produce thermosets with tunable mechanical and morphological properties. The lignin-based thermosets were obtained via a thermally induced thiol–ene reaction. The first part of this work was focused on Kraft lignin solvent fractionation and chemical modification of the ethanol soluble fraction. Chemical analysis indicated that the allylation process was selective toward phenolic hydroxyl groups. SAXS and SEM studies demonstrated that solvent fractionation and allylation processes affected the molecular and nanoscale morphological characteristics of lignin. The second part’s focus was on how the properties of thermosets can be tuned by using three different cross-linkers. The dynamic mechanical and morphological properties of three different thermosets were investigated via DMA, SAXS, and WAXS techniques. The three different thermosets exhibit similar molecular morphology but different storage modulus and glass transition temperature. In this work, it was shown that despite lignin’s heterogeneity it was possible to produce thermosetting materials with tunable properties.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)
- NATURVETENSKAP -- Kemi -- Polymerkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Polymer Chemistry (hsv//eng)
Nyckelord
- Kraft lignin
- Solvent fractionation
- Selective allylation
- Thiol−ene thermoset
- Mechanical properties
- Small- and wide-angle X-ray scattering
- Kemi
- Chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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