Novel biobased micro- and nanomaterials in porous foam formed structures

    Research output: Contribution to conferenceOther conference contributionScientific

    Abstract

    This work applies the knowledge on multi-scale lignocellulosic fibres and proteins to create novel porous fibre structures using a foam forming technology. In particular, the aim is to enable new material properties by combining multi-scale wood and agro fibres, fines, cellulose nanofibrils and surface active proteins when using foam-assisted forming process. The design driven approach contributes to the selection of raw materials and tailoring of desired micro and macro structures through the processes. The future applications include e.g. cushioning elements in packaging and acoustic materials in indoor construction. The compression strength is one of the most critical mechanical properties in both applications areas. In our study, lignin-rich fines made of spruce wood and cellulose nanofibrils improved the compression strength of foam formed structures made with SDS and PVA as foaming agents. The used cellulose nanofibrils were TEMPO-oxidised (TCNF) and native grades (CNF). In this work, the retention of CNF fibrils in foamed porous structures was studied using x-ray tomography images and elementary analysis from iron-cobalt labelled mass and water samples. The surface active proteins were investigated as a mean to strengthen the lamella of air bubbles for stabilizing the aqueous fibre foams made with SDS. The produced stronger wet foamed structures can reduce drying time significantly allowing vacuum-based dewatering. Overall, wide-range selection of novel bio-based micro -and nanomaterials significantly improved the important process and product properties of highly porous foamed structures.
    Original languageEnglish
    Pages165-175
    Number of pages11
    Publication statusPublished - 1 Jan 2017
    EventTAPPI International Conference on Nanotechnology for Renewable Materials, NANO 2017 - Montreal, Canada
    Duration: 5 Jun 20178 Jun 2017

    Conference

    ConferenceTAPPI International Conference on Nanotechnology for Renewable Materials, NANO 2017
    Abbreviated titleNANO 2017
    CountryCanada
    CityMontreal
    Period5/06/178/06/17

    Keywords

    • cellulose nanofibrils
    • fibre foams
    • highly porous structures
    • surface active proteins
    • x-ray tomography
    • labelling
    • biobased nanoparticles

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