Objectif Energy efficiency and sustainability encourage to develop lightweight materials with excellent mechanical properties, combining also additional functionalities and responses. Therein nature allows inspiration, as e.g. pearl of nacre and silk show extraordinary mechanical properties due to their aligned self-assemblies. However, biological complexity poses great challenges and in biomimetics selected features are mimicked using simpler concepts. Previously artificial nacre has been mimicked by multilayer and sequential techniques and ice-templating. However, concepts for aligned spontaneous self-assemblies are called for scalability. We will develop toughened nacre-inspired materials by templating functionalized polymers on colloidal sheets in suspension, followed by self-assembly by solvent removal. Similarly, we will develop silk-mimetic materials using aligned organic fibrous reinforcements in soft dissipative matrix. Nanofibrillated cellulose will be wet-spun using extrusion into coagulant bath, followed by post drawing, drying and functionalization to allow silk-like fibers with high mechanical properties. In another route, cellulose rod-like whiskers will be decorated with soft functional polymers allowing energy dissipation, followed by alignment and interlinking to mimick silk-assemblies. The colloidal routes allow also new functionalities by using functional polymers, e.g. electroactive and conjugated polymers and nanoparticles. Importantly, redox-active polymers are bound on the colloidal sheets. Incorporating in a planar electrochemical cell with flexible electrodes, electrochemical switching of stiffness is obtained using a small voltage, as the intercolloidal interaction is controlled by the charge state of the redox-active layers. This would allow a new class of material, eg. to interface users and devices. In summary, we present a colloidal self-assembly platform for biomimetic materials with exciting mechanical, functional, and switching properties. Champ scientifique engineering and technologymaterials engineeringfibersnatural scienceschemical scienceselectrochemistrynatural scienceschemical sciencespolymer sciencesengineering and technologynanotechnologynano-materials Programme(s) FP7-IDEAS-ERC - Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Thème(s) ERC-AG-PE5 - ERC Advanced Grant - Materials and Synthesis Appel à propositions ERC-2011-ADG_20110209 Voir d’autres projets de cet appel Régime de financement ERC-AG - ERC Advanced Grant Institution d’accueil AALTO KORKEAKOULUSAATIO SR Contribution de l’UE € 2 296 320,00 Adresse OTAKAARI 1 02150 Espoo Finlande Voir sur la carte Région Manner-Suomi Helsinki-Uusimaa Helsinki-Uusimaa Type d’activité Higher or Secondary Education Establishments Chercheur principal Olli Tapio Ikkala (Prof.) Contact administratif Matti Kaivola (Prof.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée Bénéficiaires (1) Trier par ordre alphabétique Trier par contribution de l’UE Tout développer Tout réduire AALTO KORKEAKOULUSAATIO SR Finlande Contribution de l’UE € 2 296 320,00 Adresse OTAKAARI 1 02150 Espoo Voir sur la carte Région Manner-Suomi Helsinki-Uusimaa Helsinki-Uusimaa Type d’activité Higher or Secondary Education Establishments Chercheur principal Olli Tapio Ikkala (Prof.) Contact administratif Matti Kaivola (Prof.) Liens Contacter l’organisation Opens in new window Site web Opens in new window Coût total Aucune donnée
