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

Abstract

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

Conference

ConferenceNanocomposites 2011
CountryFrance
CityParis-Est
Period7/06/1110/06/11

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Keywords

  • PLA film
  • biaxial orientation
  • nanocomposite
  • barrier properties

Cite this

Härkki, O., Karttunen, M., Kortet, S., Koponen, M., & Harlin, A. (2011). Biaxially oriented PLA-montmorillonite-nanocomposite for barrier film applications. Poster session presented at Nanocomposites 2011, Paris-Est, France.