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A method for estimating the fibre length in fibre-PLA composites
RISE., Innventia, PFI – Paper and Fiber Research Institute.ORCID-id: 0000-0002-6183-2017
RISE., Innventia, PFI – Paper and Fiber Research Institute.
RISE., Innventia, PFI – Paper and Fiber Research Institute.
SINTEF, Norway.
2013 (Engelska)Ingår i: Journal of Microscopy, ISSN 0022-2720, E-ISSN 1365-2818, Vol. 250, nr 1, s. 15-20Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Wood pulp fibres are an important component of environmentally sound and renewable fibre-reinforced composite materials. The high aspect ratio of pulp fibres is an essential property with respect to the mechanical properties a given composite material can achieve. The length of pulp fibres is affected by composite processing operations. This thus emphasizes the importance of assessing the pulp fibre length and how this may be affected by a given process for manufacturing composites. In this work a new method for measuring the length distribution of fibres and fibre fragments has been developed. The method is based on; (i) dissolving the composites, (ii) preparing the fibres for image acquisition and (iii) image analysis of the resulting fibre structures. The image analysis part is relatively simple to implement and is based on images acquired with a desktop scanner and a new ImageJ plugin. The quantification of fibre length has demonstrated the fibre shortening effect because of an extrusion process and subsequent injection moulding. Fibres with original lengths of >1 mm where shortened to fibre fragments with length of <200 μm. The shortening seems to be affected by the number of times the fibres have passed through the extruder, the amount of chain extender and the fraction of fibres in the polymer matrix.

Ort, förlag, år, upplaga, sidor
2013. Vol. 250, nr 1, s. 15-20
Nationell ämneskategori
Kompositmaterial och -teknik
Identifikatorer
URN: urn:nbn:se:ri:diva-9622DOI: 10.1111/jmi.12012Scopus ID: 2-s2.0-84874577267OAI: oai:DiVA.org:ri-9622DiVA, id: diva2:968375
Tillgänglig från: 2016-09-12 Skapad: 2016-09-12 Senast uppdaterad: 2023-05-17Bibliografiskt granskad

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Chinga-Carrasco, Gary

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