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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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Bastiaansen, Cwm Cees
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (32/32 displayed)
- 2021NIR–vis–UV Light-Responsive High Stress-Generating Polymer Actuators with a Reduced Creep Ratecitations
- 2020Direct Laser Writing of Four-Dimensional Structural Color Microactuators Using a Photonic Photoresistcitations
- 2020Thermoplastic, rubber-like marine antifouling coatings with micro-structures via mechanical embossing
- 2017Photonic shape memory polymer with stable multiple colorscitations
- 2016Tunable surface topography in fluoropolymers using photo-embossing
- 2016Electrospinning of reactive mesogens
- 2015Stimuli-responsive materials based on interpenetrating polymer liquid crystal hydrogelscitations
- 2014Humidity-responsive liquid crystalline polymer actuators with an asymmetry in the molecular trigger that bend, fold, and curlcitations
- 2014Photoembossing of surface relief structures in polymer films for biomedical applicationscitations
- 2014The role of supramolecular chemistry in stimuli responsive and hierarchically structured functional organic materials
- 2014An optical sensor for volatile amines based on an inkjet-printed, hydrogen-bonded, cholesteric liquid crystalline filmcitations
- 2014An optical sensor for volatile amines based on an inkjet-printed, hydrogen-bonded, cholesteric liquid crystalline film
- 2014Optical and topographic changes in water-responsive patterned cholesteric liquid crystalline polymer coatingscitations
- 2013New approach toward reflective films and fibers using cholesteric liquid-crystal coatings
- 2013New approach toward reflective films and fibers using cholesteric liquid-crystal coatingscitations
- 2013A real time optical strain sensor based on a cholesteric liquid crystal networkcitations
- 2013A real time optical strain sensor based on a cholesteric liquid crystal networkcitations
- 2012Engineering of complex order and the macroscopic deformation of liquid crystal polymer networkscitations
- 2012Printable optical sensors based on H-bonded supramolecular cholesteric liquid crystal networkscitations
- 2010Fully reversible transition from Wenzel to Cassie-Baxter states on corrugated superhydrophobic surfacescitations
- 2009Room temperature preparation of conductive silver features using spin-coating and inkjet printingcitations
- 2008Printing of monolithic polymeric microstructures using reactive mesogenscitations
- 2007Physical properties of anisotropically swelling hydrogen-bonded liquid crystal polymer actuatorscitations
- 2007High aspect ratio surface relief structures by photoembossingcitations
- 2005Large-area microfabrication of three-dimensional, helical polymer structurescitations
- 2005Self-assembled polymer films for controlled agent-driven motioncitations
- 2005Large amplitude light-induced motion in high elastic modulus polymer actuatorscitations
- 2001Viscoelastic liquid crystal colloids for the continuous processing of twisted nematic electro-optical cells
- 2001Viscoelastic liquid crystal colloids for the continuous processing of twisted nematic electro-optical cellscitations
- 2000A scattering electro-optical switch based on dendrimers dispersed in liquid crystals
- 2000New functional polymers for liquid crystal displays : review of some recent developments
- 2000Electro-Optical Switches Based on Polymer and Dendrimer Filled Nematics
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article
Physical properties of anisotropically swelling hydrogen-bonded liquid crystal polymer actuators
Abstract
Glassy polymeric actuators are described which reversibly deform in response to changes in pH and/or the presence of water. Hydrogen-bonded liquid crystalline monomers act as precursors, and these materials are photopolymerized (without mechanical drawing) into monodomain nematic networks. We discuss the influence of film composition, polymerization conditions, and chemical treatments on the properties of these anisotropic networks. We show that large-amplitude reversible motion can be generated in response to small changes in pH. Pretreatment in basic solutions also activates a response to water, and this effect is investigated in detail. Elastic moduli, which are directly related to the generation of work, have not been reported previously, and therefore particular attention is given to mechanical properties. A marked anisotropy is observed in the moduli parallel and perpendicular to the nematic director. We find that pretreatment in basic solutions reduces this anisotropy yet preserves magnitudes on the order of 2 GPa. Employing complex director profiles (such as the twisted configuration), extremely large amplitude bending-mode deformations are induced in response to small pH changes, immersion in water, or variations in the relative humidity. Since the elastic moduli are large, work output significantly greater than conventional liquid crystal elastomers is predicted