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Página principal > Artículos > Artículos publicados > A Self-Folding Polymer Film Based on Swelling Metal-Organic Frameworks |
Fecha: | 2018 |
Resumen: | 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. |
Ayudas: | Ministerio de Economía y Competitividad MAT2015-65354-C2-1-R Agència de Gestió d'Ajuts Universitaris i de Recerca 2014/SGR-80 European Commission 615954 Ministerio de Economía y Competitividad MAT2013-41836-R Ministerio de Economía y Competitividad P12-FQM-1656 Ministerio de Economía y Competitividad SEV-2013-0295 |
Derechos: | Tots els drets reservats. |
Lengua: | Anglès |
Documento: | Article ; recerca ; Versió acceptada per publicar |
Materia: | Composites ; Films ; Metal-organic frameworks ; Self-folding ; Swelling behaviour |
Publicado en: | Angewandte Chemie (International ed. Internet), Vol. 57, Issue 47 (November 2018) , p. 15420-15424, ISSN 1521-3773 |
Postprint 9 p, 625.2 KB |