Barrier properties of Al2O3 and alucone coatings and nanolaminates on flexible biopolymer films

Mika Vaha-Nissi*, Pia Sundberg, Emilia Kauppi, Terhi Hirvikorpi, Jenni Sievanen, Anjali Sood, Maarit Karppinen, Ali Harlin

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    50 Citations (Scopus)

    Abstract

    Thin atomic layer deposited (ALD) Al2O3 coatings are efficient barriers against gases and vapors. Al2O3 coatings are, however, brittle and straining them generates defects that impair barrier properties. Flexibility of ALD-grown Al2O3 coatings on biopolymer substrates can be improved by separating thinner Al2O3 layers with inorganic-organic alucone layers. The number and size of defects were smaller for these nanolaminates compared to the thick Al2O3 films after straining, and hence straining deteriorated the oxygen barrier properties less when applied to the laminates than when applied to the Al2O3 coatings. (C) 2012 Elsevier B. V. All rights reserved.

    Original languageEnglish
    Pages (from-to)6780-6785
    Number of pages6
    JournalThin Solid Films
    Volume520
    Issue number22
    DOIs
    Publication statusPublished - 1 Sep 2012
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Alucone
    • Barrier
    • Hybrid
    • Laminate
    • Straining
    • Thin film
    • ATOMIC LAYER DEPOSITION
    • GAS-DIFFUSION BARRIERS
    • POLYMER-COATED PAPERBOARD
    • PACKAGING MATERIALS
    • THIN-FILMS
    • TEMPERATURE
    • TRIMETHYLALUMINUM
    • PERFORMANCE
    • GROWTH

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