Totally bio-based, high-performance wood fibre biocomposites

Heidi Peltola, Kirsi Immonen, Lisa Wikström, David Sandquist, Teijo Rokkonen

    Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientific


    VTT has developed totally bio-based and compostable PLA – wood fibre com-posite material to be utilised in industrial applications. The usability of the mate-rial has been demonstrated in several processing methods and products. A large-scale injection moulding chair demo was carried out together with a de-sign company KO-HO to demonstrate the usability of the material in industrial scale. Adhesion between PLA and wood-based fibres was improved with bio-based additives and chemo-mechanical treatments providing improved ductility, tensile strength and stiffness. Especially epoxy functional polyunsaturated vege-table oils was shown to act as a combined reactive plasticiser-coupling agent in bleached softwood kraft pulp reinforced PLA composites. The material was also shown to be applicable for novel light-weight structures, contributing towards decreased ecological footprint with savings in materials, energy and costs. In thermoplastic extrusion foaming process, wood fibre reinforced PLA was demonstrated to provide a promising alternative in formation of a closed-cell structure with low density. Furthermore, the material was shown to be suitable for production of thermoformable sheets produced by film extrusion. The ex-truded sheets can be utilised e.g. in light-weight honeycomb structures. The developments can open new business opportunities together with contribution to more sustainable world.
    Original languageEnglish
    Title of host publicationNWBC 2018
    Subtitle of host publicationProceedings of the 8th Nordic Wood Biorefinery Conference
    EditorsEemeli Hytönen, Jessica Vepsäläinen
    PublisherVTT Technical Research Centre of Finland
    ISBN (Electronic)978-951-38-8671-4
    ISBN (Print)978-951-38-8672-1
    Publication statusPublished - 2018
    MoE publication typeB3 Non-refereed article in conference proceedings
    Event8th Nordic Wood Biorefinery Conference, NWBC 2018 - Scandic Marina Congress Center, Helsinki, Finland
    Duration: 23 Oct 201825 Oct 2018 (Conference website)

    Publication series

    SeriesVTT Technology


    Conference8th Nordic Wood Biorefinery Conference, NWBC 2018
    Internet address


    • biocomposites


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