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Citation link: https://media.suub.uni-bremen.de/handle/elib/6115

Publisher DOI: https://doi.org/10.3389/fmats.2021.807004
 
by 4.0

Hemp From disordered lines for new staple fibre yarns and high-performance composite applications


Authors: Graupner, Nina  
Weber, David E. 
Bell, Erik G. 
Lehmann, Karl-Heinz 
Hilgers, Hans-Willi 
Randerath, Herbert 
Gries, Thomas  
Walenta, Isabel 
Joulian, Marc 
Müssig, Jörg  
Abstract: 
The use of natural fibre-reinforced plastics for higher-stressed applications is currently often limited by the high price of high-quality semi-finished products. Therefore, the present study deals with developing yarns from cost-effective hemp from a disordered separation process (total fibre line) for composite reinforcements. Composites were fabricated using a miniature pultrusion process with thermosetting matrices from the yarns. The results show that around 90% of the flexural strength and flexural modulus of identically produced flax composites could be achieved with maximum values of 282 MPa for the flexural strength and 23.4 GPa for the flexural modulus. The yarns were additionally used to manufacture quasi-unidirectional fabrics to produce composite laminates using different manufacturing processes. The highest values were obtained for a laminate with 39 vol% fibre content, produced with a resin injection process in an autoclave, achieving a tensile strength of 155 MPa, Young's modulus of 19.4 GPa, a flexural strength of 174 MPa and bending modulus of 12.4 GPa. The characteristic values are sufficient to use the materials in applications with higher mechanical requirements.
Keywords: staple fibre yarn; rotor yarn; quasi-unidirectional fabric; hemp; mechanical properties; hybrid hemp/ glass composites
Issue Date: 28-Jan-2022
Publisher: Frontiers Media
Project: Innovative yarn structures and their competitiveness as part of the project fibre-reinforced composites for structural applications based on novel, low-twist bast fibre yarns (NF-CompPlus) 
Grant number: 22026215, 22014817, 22015417
Journal/Edited collection: Frontiers in Materials 
Start page: Article 807004
Band: 8
Type: Artikel/Aufsatz
ISSN: 2296-8016
Institution: Hochschule Bremen 
Faculty: Hochschule Bremen - Fakultät 5: Natur und Technik 
Appears in Collections:Bibliographie HS Bremen

  

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