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Can high oxygen and water vapor barrier nanocomposite coatings be obtained with a waterborne formulation?

Title data

Tsurko, Evgeny ; Feicht, Patrick ; Habel, Christoph ; Schilling, Theresa ; Daab, Matthias ; Rosenfeldt, Sabine ; Breu, Josef:
Can high oxygen and water vapor barrier nanocomposite coatings be obtained with a waterborne formulation?
In: Journal of Membrane Science. Vol. 540 (October 2017) . - pp. 212-218.
ISSN 0376-7388
DOI: https://doi.org/10.1016/j.memsci.2017.06.051

Abstract in another language

Modification of synthetic, high aspect ratio clay with 6-aminocaprohydroxamic acid hydrochloride pushes the interaction between the polyvinyl alcohol (PVA) matrix and the filler to the level where the waterborne nanocomposite becomes rather insensitive to swelling, even at an elevated relative humidity (RH). The modifier can form strong hydrogen bonds with the hydroxyl groups of PVA via the hydroxamic acid functional group. This prevents the swelling of crystalline PVA domains. Perfectly textured nanocomposite films are obtained by spraying polymer-filler suspensions. The combination of the various effects shifts the onset of significant swelling of the nanocomposites to high RH regions. Even at 90% RH, surprisingly low oxygen and water vapor transmission rates (0.11 cm³ m⁻² day⁻¹ bar⁻¹ and 0.18 g m⁻² day⁻¹, respectively, for a coating of 0.42 µm) are observed that may render PVA-based, waterborne coatings interesting for food packaging applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: Layered silicates; Polymer nanocomposites; Hydrogen bonds; Gas barrier; Spray coating
Institutions of the University: Faculties
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 Anorganic Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie
Research Institutions > Collaborative Research Centers, Research Unit > SFB 840 Von partikulären Nanosystemen zur Mesotechnologie > SFB 840 - TP B 3
Research Institutions
Research Institutions > Collaborative Research Centers, Research Unit
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 29 Mar 2018 07:25
Last Modified: 29 Mar 2018 07:25
URI: https://eref.uni-bayreuth.de/id/eprint/43100