2024-03-29T08:40:43Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1990422020-01-29T03:17:39Zcom_10261_10252com_10261_3col_10261_10253
00925njm 22002777a 4500
dc
Troyano, Javier
author
Carné-Sánchez, Arnau
author
Pérez-Carvajal, Javier
author
León-Reina, Laura
author
Imaz, Inhar
author
Cabeza, Aurelio
author
Maspoch, Daniel
author
2018
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.
Angewandte Chemie International Edition 57(47): 15420-15424 (2018)
1433-7851
http://hdl.handle.net/10261/199042
10.1002/anie.201808433
1521-3773
http://dx.doi.org/10.13039/501100000780
http://dx.doi.org/10.13039/501100002809
http://dx.doi.org/10.13039/501100003329
http://dx.doi.org/10.13039/501100011011
30226289
Composites
Films
Swelling behaviour
A self‐folding polymer film based on swelling metal–organic frameworks