High gas barrier coating using non-toxic nanosheet dispersions for flexible food packaging film

Jingfang Yu, Kanittika Ruengkajorn, Dana-Georgiana Crivoi, Chunping Chen, Jean-Charles Buffet and Dermot O’Hare ()
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Jingfang Yu: University of Oxford
Kanittika Ruengkajorn: University of Oxford
Dana-Georgiana Crivoi: University of Oxford
Chunping Chen: University of Oxford
Jean-Charles Buffet: University of Oxford
Dermot O’Hare: University of Oxford

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract One of the major challenges in the circular economy relating to food packaging is the elimination of metallised film which is currently the industry standard approach to achieve the necessary gas barrier performance. Here, we report the synthesis of high aspect ratio 2D non-toxic layered double hydroxide (LDH) nanosheet dispersions using a non-toxic exfoliation method in aqueous amino acid solution. High O2 and water vapour barrier coating films can be prepared using food safe liquid dispersions through a bar coating process. The oxygen transmission rate (OTR) of 12 μm PET coated film can be reduced from 133.5 cc·m−2·day−1 to below the instrument detection limit (

Date: 2019
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DOI: 10.1038/s41467-019-10362-2

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