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Nematic suspension of a microporous layered silicate obtained by forceless spontaneous delamination via repulsive osmotic swelling for casting high-barrier all-inorganic films

Title data

Loch, Patrick ; Schuchardt, Dominik ; Algara-Siller, Gerardo ; Markus, Paul ; Ottermann, Katharina ; Rosenfeldt, Sabine ; Lunkenbein, Thomas ; Schwieger, Wilhelm ; Papastavrou, Georg ; Breu, Josef:
Nematic suspension of a microporous layered silicate obtained by forceless spontaneous delamination via repulsive osmotic swelling for casting high-barrier all-inorganic films.
In: Science Advances. Vol. 8 (20 May 2022) Issue 20 . - eabn9084.
ISSN 2375-2548
DOI: https://doi.org/10.1126/sciadv.abn9084

Official URL: Volltext

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Exploiting the full potential of layered materials for a broad range of applications requires delamination into functional nanosheets. Delamination via repulsive osmotic swelling is driven by thermodynamics and represents the most gentle route to obtain nematic liquid crystals consisting exclusively of single-layer nanosheets. This mechanism was, however, long limited to very few compounds, including 2:1-type clay minerals, layered titanates, or niobates. Despite the great potential of zeolites and their microporous layered counterparts, nanosheet production is challenging and troublesome, and published procedures implied the use of some shearing forces. Here, we present a scalable, eco-friendly, and utter delamination of the microporous layered silicate ilerite into single-layer nanosheets that extends repulsive delamination to the class of layered zeolites. As the sheet diameter is preserved, nematic suspensions with cofacial nanosheets of approximate to 9000 aspect ratio are obtained that can be cast into oriented films, e.g., for barrier applications.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: NANOSHEET CRYSTALLITES; ZEOLITE; EXFOLIATION; SODIUM; MFI
Institutions of the University: 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
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 04 Oct 2022 07:25
Last Modified: 05 Dec 2022 13:04
URI: https://eref.uni-bayreuth.de/id/eprint/72185