Biaxially oriented PLA-montmorillonite-nanocomposite for barrier film applications

Outi Härkki, Mikko Karttunen, Satu Kortet, Matti Koponen, Ali Harlin

    Research output: Contribution to conferenceConference PosterScientific


    Polymer layered silicate nanocomposites are prepared by incorporating finely dispersed nanoclay in a polymer matrix. There is need for sustainable solutions in packaging industry for high-barrier food packages, which are used in massive volumes. Therefore bio-based and biodegradable PLA is selected as matrix polymer in this study. Montmorillonite nanoclay has high aspect ratio and unique intercalation/exfoliation potential and is selected as the nanofiller to improve the barrier properties of the film. Dispersion of the plate shaped nanoparticles in the polymer matrix is studied. Dispersion can be improved by adjusting the compounding process parameters. Also some compatibilizers are tested to generate the optimal dispersion of the nanoclay. The PLA nanocomposite film is biaxially oriented to prepare a mechanically strong thin film having desired barrier properties. The best orientation parameters for the materials are searched and tested. Transparency and oxygen permeability of the film is controlled by varying the weight fraction of the nanoclay and its dispersion in the polymer matrix.
    Original languageEnglish
    Publication statusPublished - 2011
    MoE publication typeNot Eligible
    EventNanocomposites 2011 - Creteil University, Paris-Est, France
    Duration: 7 Jun 201110 Jun 2011


    ConferenceNanocomposites 2011


    • PLA film
    • biaxial orientation
    • nanocomposite
    • barrier properties


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