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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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Schenning, Aphj Albert
Eindhoven University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (37/37 displayed)
- 2023Melt-Extruded Thermoplastic Liquid Crystal Elastomer Rotating Fiber Actuatorscitations
- 2023Switching between 3D surface topographies in liquid crystal elastomer coatings using two-step imprint lithographycitations
- 2022Hydrogen-Bonded Supramolecular Liquid Crystal Polymers: Smart Materials with Stimuli-Responsive, Self-Healing, and Recyclable Propertiescitations
- 2021NIR–vis–UV Light-Responsive High Stress-Generating Polymer Actuators with a Reduced Creep Ratecitations
- 2021Patterned Actuators via Direct Ink Writing of Liquid Crystalscitations
- 2020Stimuli-Responsive Shape Changing Commodity Polymer Composites and Bilayerscitations
- 2020Direct Laser Writing of Four-Dimensional Structural Color Microactuators Using a Photonic Photoresistcitations
- 2019An untethered magnetic- and light-responsive rotary gripper: shedding light on photoresponsive liquid crystal actuatorscitations
- 20193D helix engineering in chiral photonic materialscitations
- 2018Hydrogen-bonded siloxane liquid crystals for hybrid nanomaterials
- 2018Stimuli-responsive polymer film or coating prepared by mixing in a suitable fashion a side chain liquid crystalline polymer with reactive mesogens and responsive devices:process for preparing the same
- 2018Stimuli-responsive polymer film or coating prepared by mixing in a suitable fashion a side chain liquid crystalline polymer with reactive mesogens and responsive devices
- 2017A rewritable, reprogrammable, dual light-responsive polymer actuatorcitations
- 2017Anisotropic dye adsorption and anhydrous proton conductivity in smectic liquid crystal networks:the role of cross-link density, order, and orientation
- 2017Photonic shape memory polymer with stable multiple colorscitations
- 2017Easily processable temperature-responsive infrared-reflective polymer coatings
- 2016Regulating the modulus of a chiral liquid crystal polymer network by lightcitations
- 2016A chaotic self-oscillating sunlight driven polymer actuatorcitations
- 2016Stimuli-responsive liquid crystalline materialscitations
- 2015Hydrogen bonding in supramolecular nanoporous materials
- 2015Stimuli-responsive materials based on interpenetrating polymer liquid crystal hydrogelscitations
- 2015Nanoporous adsorbent material for removing species from an aqueous solution
- 2015Liquid crystal polymer membranescitations
- 2014Humidity-responsive liquid crystalline polymer actuators with an asymmetry in the molecular trigger that bend, fold, and curlcitations
- 2014Responsive nanoporous smectic liquid drystal polymer networks as efficient and selective adsorbentscitations
- 2014Accordion-like actuators of multiple 3D patterned liquid crystal polymer filmscitations
- 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
- 2013Photoswitchable hydrogel surface topographies by polymerisation-induced diffusioncitations
- 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
- 2008Molecular weight optimum in the mesoscopic order of chiral fluorene (Co)polymer filmscitations
- 2003Highly emissive supramolecular oligo(p-phenylene vinylene) dendrimers
- 2002A soluble equivalent of the supramolecular, quasi-one-dimensional, semiconducting Magnus' green saltcitations
- 2001Synthesis and properties of self organising semiconducting and luminescent polymers and model compounds
Places of action
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article
Regulating the modulus of a chiral liquid crystal polymer network by light
Abstract
We report a novel way to modulate the elastic modulus of azobenzene containing liquid crystal networks (LCNs) by exposure to light. The elastic modulus can cycle between different levels by controlling the illumination conditions. Exposing the polymer network to UV light near the trans absorption band of azobenzene gives a small reduction of the glass transition temperature thereby lowering the modulus. The addition of blue light addressing the cis absorption band surprisingly amplifies this effect. The continuous oscillatory effects of the trans-to-cis isomerization of the azobenzene overrule the overall net cis conversion. The influence on the chain dynamics of the network is demonstrated by dynamic mechanical thermal analysis which shows a large shift of the glass transition temperature and a modulus decrease by more than two orders of magnitude. The initial high modulus and the glassy state are recovered within a minute in the dark by switching off the light sources, despite the observation that azobenzene is still predominantly in its cis state. Based on these new findings, we are able to create a shape memory polymer LCN film at room temperature using light.