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Mechanical properties of natural fiber composites produced using dynamic sheet former
Luleå University of Technology, Sweden.
Luleå University of Technology, Sweden.
RISE - Research Institutes of Sweden, Swerea, Swerea SICOMP. Luleå University of Technology, Sweden.
RISE - Research Institutes of Sweden, Bioeconomy, Biobased Materials.
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2018 (English)In: Wood Material Science & Engineering, ISSN 1748-0272, E-ISSN 1748-0280Article in journal (Refereed) In press
Abstract [en]

Composites formed from wood fibers and man-made cellulosic fibers in PLA (polylactic acid) matrix, manufactured using sheet forming technique and hot pressing, are studied. The composites have very low density (due to high porosity) and rather good elastic modulus and tensile strength. As expected, these properties for the four types of wood fiber composites studied here improve with increasing weight fraction of fibers, even if porosity is also increasing. On the contrary, for man-made cellulosic fiber composites with circular fiber cross-section, the increasing fiber weight fraction (accompanied by increasing void content) has detrimental effect on stiffness and strength. The differences in behavior are discussed attributing them to fiber/ fiber interaction in wood fiber composites which does not happen in man-made fiber composites, and by rather weak fiber/matrix interface for man-made fibers leading to macro-crack formation in large porosity regions.

Place, publisher, year, edition, pages
2018.
Keywords [en]
Wood fiber composites, PLA, Tencel fibers, dynamic sheet former, stiffness, strength
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:ri:diva-33933DOI: 10.1080/17480272.2018.1482368OAI: oai:DiVA.org:ri-33933DiVA, id: diva2:1217065
Available from: 2018-06-12 Created: 2018-06-12 Last updated: 2018-08-08Bibliographically approved

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Publisher's full texthttps://www.tandfonline.com/doi/abs/10.1080/17480272.2018.1482368
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CiteExportLink to record
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