Thermoreversible Self-Assembly of Perfluorinated Core-Coronas Cellulose-Nanoparticles in Dry State.

Autor: Wang Y; Wood Technology and Wood Chemistry, Georg-August-University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany., Groszewicz PB; Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 4, D-64287, Darmstadt, Germany., Rosenfeldt S; Physical Chemistry I and Bavarian Polymer Institute, University of Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany., Schmidt H; Institute for Material Physics, Georg-August-University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany., Volkert CA; Institute for Material Physics, Georg-August-University of Göttingen, Friedrich-Hund-Platz 1, 37077, Göttingen, Germany., Vana P; Institute of Physical Chemistry, Georg-August-University of Göttingen, Tammannstrasse 6, 37077, Göttingen, Germany., Gutmann T; Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 4, D-64287, Darmstadt, Germany., Buntkowsky G; Eduard-Zintl-Institute for Inorganic Chemistry and Physical Chemistry, Technical University of Darmstadt, Alarich-Weiss-Straße 4, D-64287, Darmstadt, Germany., Zhang K; Wood Technology and Wood Chemistry, Georg-August-University of Göttingen, Büsgenweg 4, 37077, Göttingen, Germany.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2017 Nov; Vol. 29 (43). Date of Electronic Publication: 2017 Oct 06.
DOI: 10.1002/adma.201702473
Abstrakt: Self-assembly of nanoparticles (NPs) forming unique structures has been investigated extensively over the past few years. However, many self-assembled structures by NPs are irreversible, because they are generally constructed using their suspensions. It is still challenging for NPs to reversibly self-assemble in dry state, let alone of polymeric NPs with general sizes of hundreds of nm. Herein, this study reports a new reversible self-assembly phenomenon of NPs in dry state, forming thermoreversible strip-like supermolecular structures. These novel NPs of around 150 nm are perfluorinated surface-undecenoated cellulose nanoparticles (FSU-CNPs) with a core-coronas structure. The thermoreversible self-assembled structure is formed after drying in the air at the interface between FSU-CNP films and Teflon substrates. Remarkably, the formation and dissociation of this assembled structure are accompanied by a reversible conversion of the surface hydrophobicity, film transparency, and anisotropic properties. These findings show novel feasibility of reversible self-assembly of NPs in dry state, and thereby expand our knowledge of self-assembly phenomenon.
(© 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)
Databáze: MEDLINE
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