A Self-Folding Polymer Film Based on Swelling Metal-Organic Frameworks
Troyano, Javier (Institut Català de Nanociència i Nanotecnologia)
Carné-Sánchez, Arnau (Institut Català de Nanociència i Nanotecnologia)
Pérez-Carvajal, Javier (Institut Català de Nanociència i Nanotecnologia)
León Reina, Laura (Universidad de Málaga)
Imaz, Inhar (Institut Català de Nanociència i Nanotecnologia)
Cabeza, Aurelio (Universidad de Málaga)
Maspoch Comamala, Daniel (Institut Català de Nanociència i Nanotecnologia)

Date:	2018
Abstract:	Herein, we exploit the well-known swelling behaviour of metal-organic frameworks (MOFs) to create a self-folding polymer film. Namely, we show that incorporating crystals of the flexible MOF MIL-88A into a polyvinylidene difluoride (PVDF) matrix affords a polymer composite film that undergoes reversible shape transformations upon exposure to polar solvents and vapours. Since the self-folding properties of this film correlate directly with the swelling properties of the MIL-88A crystals, it selectively bends to certain solvents and its degree of folding can be controlled by controlling the relative humidity. Moreover, it shows a shape-memory effect at relative humidity values from 60 % to 90 %. As proof of concept, we demonstrate that these composite films can lift cargo and can be used to assemble 3D structures from 2D patterns. Our strategy is a straightforward method for designing autonomous soft materials with folding properties that can be tuned by judicious choice of the constituent flexible MOF.
Note:	Número d'acord de subvenció MINECO/MAT2015-65354-C2-1-R
Note:	Número d'acord de subvenció AGAUR/2014/SGR-80
Note:	Número d'acord de subvenció EC/FP7/615954
Note:	Número d'acord de subvenció MINECO/MAT2013-41836-R
Note:	Número d'acord de subvenció MINECO/P12-FQM-1656
Note:	Número d'acord de subvenció MINECO/SEV-2013-0295
Rights:	Tots els drets reservats
Language:	Anglès
Document:	article ; recerca ; acceptedVersion
Subject:	Composites ; Films ; Metal-organic frameworks ; Self-folding ; Swelling behaviour
Published in:	Angewandte Chemie (International ed. Internet), Vol. 57, Issue 47 (November 2018) , p. 15420-15424, ISSN 1521-3773

DOI: 10.1002/anie.201808433

Postprint 9 p, 625.2 KB

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Research literature > UAB research groups literature > Research Centres and Groups (scientific output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles