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Spontaneous delamination of affordable natural vermiculite as a high barrier filler for biodegradable food packaging

Title data

Dudko, Volodymr ; Timmins, Renee ; Khoruzhenko, Olena ; Röhrl, Maximilian ; Greve, Christopher ; Rosenfeldt, Sabine ; Tammelin, Tekla ; Agarwal, Seema ; Herzig, Eva M. ; Breu, Josef:
Spontaneous delamination of affordable natural vermiculite as a high barrier filler for biodegradable food packaging.
In: Materials Advances. (2022) .
ISSN 2633-5409
DOI: https://doi.org/10.1039/D2MA00734G

Official URL: Volltext

Abstract in another language

Expensive biodegradable packaging as a preventative measure against continued accumulation of plastic waste in our environment is often in conflict with the need for high performing packaging materials that prevent food waste. Compounding with delaminated vermiculite nanosheets is a compelling concept to simultaneously improve barrier properties through creation of a ‘tortuous path’ while also decreasing the price of the system due to its natural abundance. However, an effective delamination process that captures the full barrier improvement potential of this natural filler has been lacking. Here, we present a superior protocol for vermiculite delamination based on reducing the intrinsic hydrophobicity due to interlayer Mg2+ cations and the transfer of this osmotically swollen, liquid crystalline state into organic solvents. Nanocomposite coatings of degradable polyesters on nanocellulose exhibited oxygen and water transmission rates of 1.30 cm3 m−2 day−1 atm−1 and 1.74 g m−2 day−1, respectively, which competes with high-end, non-degradable poly(vinylidene dichloride) films.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation > Juniorprofessor Experimental Physics VII - Dynamics and Structure Formation - Juniorprof. Dr. Eva M. Herzig
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 15 Nov 2022 06:53
Last Modified: 15 Nov 2022 06:53
URI: https://eref.uni-bayreuth.de/id/eprint/72771