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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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Giuntoli, Andrea
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Topics
Publications (9/9 displayed)
- 2024Structure-Property Relationships of Granular Hybrid Hydrogels Formed through Polyelectrolyte Complexationcitations
- 2024Structure–Property Relationships of Granular Hybrid Hydrogels Formed through Polyelectrolyte Complexationcitations
- 2023Tailoring flake size and chemistry to improve impact resistance of graphene oxide thin filmscitations
- 2023Shear Thinning from Bond Orientation in Model Unentangled Bottlebrush Polymer Meltscitations
- 2022The effect of nanoparticle softness on the interfacial dynamics of a model polymer nanocompositecitations
- 2021Systematic coarse-graining of epoxy resins with machine learning-informed energy renormalizationcitations
- 2021Systematic coarse-graining of epoxy resins with machine learning-informed energy renormalizationcitations
- 2017Effect of nematic ordering on the elasticity and yielding in disordered polymeric solidscitations
- 2016Bond disorder, frustration and polymorphism in the spontaneous crystallization of a polymer meltcitations
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article
Structure-Property Relationships of Granular Hybrid Hydrogels Formed through Polyelectrolyte Complexation
Abstract
<p>Hybrid hydrogels are hydrogels that exhibit heterogeneity in the network architecture by means of chemical composition and/or microstructure. The different types of interactions, together with structural heterogeneity, which can be created on different length scales, determine the mechanical properties of the final material to a large extent. In this work, the microstructure-mechanical property relationships for a hybrid hydrogel that contains both electrostatic and covalent interactions are investigated. The hybrid hydrogel is composed of a microphase-separated polyelectrolyte complex network (PEC) made of poly(4-styrenesulfonate) and poly(diallyldimethylammonium chloride) within a soft and elastic polyacrylamide hydrogel network. The system exhibits a granular structure, which is attributed to the liquid-liquid phase separation into complex coacervate droplets induced by the polymerization and the subsequent crowding effect of the polyacrylamide chains. The coacervate droplets are further hardened into PEC granules upon desalting the hydrogel. The structure formation is confirmed by a combination of electron microscopic imaging and molecular dynamics simulations. The interpenetration of both networks is shown to enhance the toughness of the resulting hydrogels due to the dissipative behavior of the PEC through the rupture of electrostatic interactions. Upon cyclic loading-unloading, the hydrogels show recovery of up to 80% of their original dissipative behavior in less than 300 s of rest with limited plasticity. The granular architecture and the tough and self-recoverable properties of the designed hybrid networks make them good candidates for applications, such as shape-memory materials, actuators, biological tissue mimics, and elastic substrates for soft sensors.</p>