Gas barrier properities of polymeric films with hybrid organic/inorganic coatings for food pacding applications

M. Minelli, M. Rocchetti, M.G. De Angelis, A. Montenero, F. Doghieri

Research output: Contribution to conferencePaperpeer-review

Abstract

The permeability and diffusivity of oxygen in films of PET coated with a thin layer of a hybrid organic/inorganic (ceramer) material have been determined at 65°C. The permeability data are collected using a closed-volume permeation apparatus and the diffusivity has been calculated with the time-lag method. The addition of coating dramatically improves the oxygen barrier properties of the substrate, the apparent permeability of the multilayer film being up to 3 orders of magnitude lower than that of pure PET. The pure coating properties are opportunely calculated by taking into account the effect of the different diffusion resistances in the various layers. The effect of ageing has also been investigated, by comparing the oxygen permeability before and after immersion in water of the films that are suspected to be degraded by water.
Original languageEnglish
Publication statusPublished - 2006

Keywords

  • Barrier properties
  • Before and after
  • Ceramers
  • Coating properties
  • Diffusion resistances
  • Effect of ageing
  • Gas barriers
  • Hybrid organic/inorganic materials
  • Orders of magnitudes
  • Organic/inorganic
  • Organic/inorganic coatings
  • Oxygen barriers
  • Oxygen permeabilities
  • Polymeric films
  • Thin layers
  • Capillarity
  • Diffusion
  • Diffusion coatings
  • Hybrid materials
  • Liquids
  • Materials properties
  • Multilayer films
  • Oxygen
  • Polyethylene terephthalates
  • Polymers
  • Positron emission tomography
  • Solids
  • Gas permeable membranes

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