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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

Loch, P., Schuchardt, D., Algara-Siller, G., Markus, P., Ottermann, K., Rosenfeldt, S., et al. (2022). Nematic suspension of a microporous layered silicate obtained by forceless spontaneous delamination via repulsive osmotic swelling for casting high-barrier all-inorganic films. Science Advances, 8(20): eabn9084. doi:/10.1126/sciadv.abn9084.

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 Creators:
Loch, Patrick1, Author
Schuchardt, Dominik1, Author
Algara-Siller, Gerardo2, 3, Author           
Markus, Paul1, Author
Ottermann, Katharina1, Author
Rosenfeldt, Sabine1, Author
Lunkenbein, Thomas2, Author           
Schwieger, Wilhelm4, Author
Papastavrou, Georg1, Author
Breu, Josef1, Author
Affiliations:
1Bavarian Polymer Institute, Department of Chemistry, University of Bayreuth, Universitätsstraße 30, D-95447 Bayreuth, Germany., ou_persistent22              
2Inorganic Chemistry, Fritz Haber Institute, Max Planck Society, ou_24023              
3Institute of Physics and IRIS Adlershof, Humboldt-Universität zu Berlin, D-12489 Berlin, Germany., ou_persistent22              
4Institute of Chemical Reaction Engineering, Friedrich-Alexander University Erlangen-Nürnberg, Egerlandstraße 3, D-91058 Erlangen, Germany., ou_persistent22              

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 Abstract: 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 ≈9000 aspect ratio are obtained that can be cast into oriented films, e.g., for barrier applications.

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Language(s): eng - English
 Dates: 2021-12-292022-04-012022-05-18
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: /10.1126/sciadv.abn9084
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Title: Science Advances
  Other : Sci. Adv.
Source Genre: Journal
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Publ. Info: Washington : AAAS
Pages: 7 Volume / Issue: 8 (20) Sequence Number: eabn9084 Start / End Page: - Identifier: ISSN: 2375-2548
CoNE: https://pure.mpg.de/cone/journals/resource/2375-2548