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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Mays, Timothy J.
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (17/17 displayed)
- 2024Hydrogen storage capacity of freeze cast microporous monolithic composites
- 2021Solvent Sorption-Induced Actuation of Composites Based on a Polymer of Intrinsic Microporositycitations
- 2021Kinetics and enthalpies of methane adsorption in microporous materials AX-21, MIL-101 (Cr) and TE7citations
- 2017Mechanical characterisation of polymer of intrinsic microporosity PIM-1 for hydrogen storage applicationscitations
- 2017AFM imaging and nanoindentation of polymer of intrinsic microporosity PIM-1citations
- 2015PIM-MOF Composites for Use in Hybrid Hydrogen Storage Tanks
- 2015Direct Evidence for Solid-like Hydrogen in a Nanoporous Carbon Hydrogen Storage Material at Supercritical Temperaturescitations
- 2015Direct evidence for solid-like hydrogen in a nanoporous carbon hydrogen storage material at supercritical temperaturescitations
- 2015High volumetric and energy densities of methane stored in nanoporous materials at ambient temperatures and moderate pressurescitations
- 2015High volumetric and energy densities of methane stored in nanoporous materials at ambient temperatures and moderate pressurescitations
- 2014Isosteric enthalpies for hydrogen adsorbed on nanoporous materials at high pressurescitations
- 2014Isosteric enthalpies for hydrogen adsorbed on nanoporous materials at high pressurescitations
- 2013Supercritical hydrogen adsorption in nanostructured solids with hydrogen density variation in porescitations
- 2013Supercritical hydrogen adsorption in nanostructured solids with hydrogen density variation in porescitations
- 2012Improving comparability of hydrogen storage capacities of nanoporous materialscitations
- 2011Analysis of hydrogen storage in nanoporous materials for low carbon energy applicationscitations
- 2011Analysis of hydrogen storage in nanoporous materials for low carbon energy applicationscitations
Places of action
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article
Solvent Sorption-Induced Actuation of Composites Based on a Polymer of Intrinsic Microporosity
Abstract
Materials that are capable of actuation in response to a variety of external stimuli are of significant interest for applications in sensors, soft robotics, and biomedical devices. Here, we present a class of actuators using composites based on a polymer of intrinsic microporosity (PIM). By adding an activated carbon (AX21) filler to a PIM, the composite exhibits repeatable actuation upon solvent evaporation and wetting and it is possible to achieve highly controlled three-dimensional actuation. Curled composite actuators are shown to open upon exposure to a solvent and close as a result of solvent evaporation. The degree of curling and actuation is controlled by adjusting the amount of filler and evaporation rate of the solvent casting process, while the actuation speed is controlled by adjusting the type of solvent. The range of forces and actuation speed produced by the composite is demonstrated using acetone, ethanol, and dimethyl sulfoxide as the solvent. The maximum contractile stress produced upon solvent desorption in the pure PIM polymer reached 12 MPa, with an ultimate force over 20 000 times the weight of a sample. This form of the composite actuator is insensitive to humidity and water, which makes it applicable in an aqueous environment, and can survive a wide range of temperatures. These characteristics make it a promising actuator for the diverse range of operating conditions in robotic and medical applications. The mechanism of actuation is discussed, which is based on the asymmetric distribution of the carbon filler particles that leads to a bilayer structure and the individual layers expand and contract differently in response to solvent wetting and evaporation, respectively. Finally, we demonstrate the application of the actuator as a potential drug delivery vehicle, with capacity for encapsulating two kinds of drugs and reduced drug leakage in comparison to existing technologies.