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Tailoring of the mechanical and thermal properties of hemp/PLA hybrid yarn composites
University of Borås, School of Engineering. (Polymer Group)
University of Borås, Swedish School of Textiles. (Polymer Group)
University of Borås, School of Engineering. (Polymer Group)
2013 (English)Conference paper, (Other academic)
Sustainable development
The content falls within the scope of Sustainable Development
Abstract [en]

In this study, we worked on improving the orientation of hemp fibres in composites by using our recent development of co-wrapped yarn structures. We investigated the influence of fibre content and wrap density on the properties of composites. Composites were fabricated by compression moulding of 0/90 bidirectional prepregs. Compared to neat PLA, the tensile and flexural modulus and the strength of the PLA-hemp composites were significantly higher as a result of the increased fibre content. Impact strength of the composites decreased initially up to 10 mass % fibre loading, but even higher fibre loading caused an improvement in impact strength. From the DMTA results, it was evident that incorporation of the fibres gives a considerable increase in storage modulus and a decrease in tan δ values. From the general trend in the results obtained, it can be affirmed that co-wrapped hybrid yarn with lower wrapping density leads to lower mechanical properties in the composite. The study performed with DSC revealed that the crystallisation temperature of the hemp-reinforced PLA composites decreased compared to pure PLA, which indicates that the hemp fibres hinder the migration and diffusion of PLA molecular chains to the surface of the nucleus in the composites.

Place, publisher, year, edition, pages
2013.
Keyword [en]
Polymer–matrix composites, Mechanical properties, Porosity, Scanning electron microscopy (SEM), Resource Recovery
National Category
Materials Engineering
Research subject
Resource Recovery
Identifiers
URN: urn:nbn:se:hb:diva-7060Local ID: 2320/12945OAI: oai:DiVA.org:hb-7060DiVA: diva2:887767
Conference
3rd Avancell conference, Chalmers University of Technology, Gothenburg, Sweden, October 8 - 9, 2013
Available from: 2015-12-22 Created: 2015-12-22 Last updated: 2016-11-18Bibliographically approved

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Baghaei, BehnazBerglin, LenaSkrifvars, Mikael
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Citation style
  • apa
  • harvard1
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  • modern-language-association-8th-edition
  • vancouver
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  • de-DE
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  • nn-NO
  • nn-NB
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