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Fabrication of chitosan-flax composites with differing molecular weights and its effect on mechanical properties

Rath, Amrita; Grisin, Benjamin; Pallicity, Tarkes Dora 1; Glaser, Lukas; Guhathakurta, Jajnabalkya; Oehlsen, Nina; Simon, Sven; Carosella, Stefan; Middendorf, Peter; Stegbauer, Linus
1 Institut für Technische Mechanik (ITM), Karlsruher Institut für Technologie (KIT)

Abstract:

An aqueous fabrication method is investigated for a composite reinforced with chitosan and flax fibers. The composite is characterized structurally, mechanically and chemically. A strong influence of molecular weight (MW) is identified on the composite properties. A strong fiber-matrix interface, which is associated with porosity and effective fiber impregnation, is achieved by applying low molecular weight (LMW) solution followed by casting using LMW or medium molecular weight (MMW) solution. Porosity is analyzed using μ-CT analysis. Increasing porosity with increasing molecular weight results in a decline of the tensile and flexural properties of the composites. The chitosan-flax composites have a low density compared to synthetic and natural fiber composites, which is a competitive advantage as a replacement material for particle board or plyboard in suspended ceilings, furniture compartments, sports or leisure equipment. A multiscale simulation is carried out to compute the directional effective elastic properties and predicts a potential 21% improvement of the tensile modulus if the process is optimized. This work shows the potential of chitosan-flax composites as a sustainable green material with an aqueous fabrication procedure and useful mechanical properties.


Verlagsausgabe §
DOI: 10.5445/IR/1000156328
Veröffentlicht am 03.03.2023
Originalveröffentlichung
DOI: 10.1016/j.compscitech.2023.109952
Scopus
Zitationen: 6
Web of Science
Zitationen: 4
Dimensions
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technische Mechanik (ITM)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 04.2023
Sprache Englisch
Identifikator ISSN: 0266-3538, 1879-1050
KITopen-ID: 1000156328
Erschienen in Composites Science and Technology
Verlag Elsevier
Band 235
Seiten Art.-Nr.: 109952
Vorab online veröffentlicht am 09.02.2023
Schlagwörter Bio composites, Natural fiber composites, Mechanical properties, Multiscale material modeling, Biodegradability
Nachgewiesen in Web of Science
Dimensions
Scopus
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