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Stretchable Clay Nanocomposite Barrier Film for Flexible Packaging

Title data

Röhrl, Maximilian ; Timmins, Renee ; Rosenfeldt, Sabine ; Schuchardt, Dominik ; Uhlig, Felix ; Nürmberger, Simon ; Breu, Josef:
Stretchable Clay Nanocomposite Barrier Film for Flexible Packaging.
In: ACS Applied Materials & Interfaces. Vol. 15 (2023) Issue 18 . - pp. 22524-22531.
ISSN 1944-8252
DOI: https://doi.org/10.1021/acsami.3c02504

Official URL: Volltext

Project information

Project title:
Project's official title
Project's id
SFB 1357 Mikroplastik
391977956

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The goal of reconciling all packaging requirements, e.g., mechanical resistance, transparency, flexibility, and gas barrier properties, is immensely challenging for packaging materials. Particularly, the combination of flexibility and good gas barrier properties poses a serious problem, especially when barrier requirements can only be met by lamination with a metal foil, metalization, or vapor-deposited ceramic layers, as all of these tend to be nonstretchable. In this work, we produced a stretchable nanocomposite barrier composed of one-dimensional (1D) crystalline (Bragg stack) barrier films composed of alternating layers of poly(ethylene glycol) (PEG) and synthetic sodium fluorohectorite (Hec) nanosheets. By sandwiching the Bragg stack type film between two plasticized poly(vinyl alcohol) (PVOH) layers, a waterborne laminate was obtained that outperforms commercial polymer materials in terms of water vapor permeability (WVP = 2.8 g mm m–2 day–1 bar–1 at 23 °C and 85% relative humidity), which is remarkable for an entirely water-soluble film. Moreover, no deterioration of barrier performance up to 10% elongation was observed, rendering the transparent self-standing laminate promising for thermoformed blister packaging, shrink wrap, or vacuum packaging. Besides the low WVP, the scalable and green processing method makes this technology auspicious for real-world applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: nanocomposite barrier; vacuum-sealed packaging; hydrogen tank; flexible barrier; stretchability
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Inorganic Chemistry I > Chair Inorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Profile Fields
Profile Fields > Advanced Fields
Profile Fields > Advanced Fields > Polymer and Colloid Science
Research Institutions > Affiliated Institutes > Bavarian Polymer Institute (BPI)
Research Institutions > Collaborative Research Centers, Research Unit > SFB 1357 - MIKROPLASTIK
Faculties
Research Institutions
Research Institutions > Affiliated Institutes
Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 500 Natural sciences
500 Science > 530 Physics
500 Science > 540 Chemistry
Date Deposited: 20 Jun 2023 07:03
Last Modified: 19 Oct 2023 13:37
URI: https://eref.uni-bayreuth.de/id/eprint/81370