Nanotube fibers for electromechanical and shape memory actuators
| Autor: | Lucie Viry, Pierre Miaudet, Philippe Poulin, Alexander Kuhn, Maryse Maugey, Cécile Zakri, Célia Mercader, Alain Derré |
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| Přispěvatelé: | Centre de recherches Paul Pascal (CRPP), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), ISM, ISM Site ENSCPB |
| Jazyk: | angličtina |
| Rok vydání: | 2010 |
| Předmět: |
Nanotube
Materials science Carbon nanotube actuators Mechanical properties of carbon nanotubes 02 engineering and technology General Chemistry Shape-memory alloy Carbon nanotube [CHIM.MATE]Chemical Sciences/Material chemistry Nanotube fibers 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter::Mesoscopic Systems and Quantum Hall Effect 01 natural sciences 0104 chemical sciences law.invention Carbon nanotube metal matrix composites Shape-memory polymer Condensed Matter::Materials Science Carbon nanobud law Materials Chemistry Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Chemistry Journal of Materials Chemistry, Royal Society of Chemistry, 2010, 20, pp. 3487-3495. ⟨10.1039/b924430a⟩ |
| ISSN: | 0959-9428 1364-5501 |
| DOI: | 10.1039/b924430a⟩ |
| Popis: | 9 pages; International audience; Carbon nanotubes are light, stiff and electroactive materials particularly promising in the field of actuating materials. Indeed, carbon nanotubes can expand and contract upon charge injection and be used for the development of electromechanical actuators. Carbon nanotubes can also be included in polymers to improve their properties and bring specific functionalities. When added to shape memory polymers, carbon nanotubes yield an improved stiffness and the possibility to heat the material through Joule's heating. Nevertheless, spatial ordering of the nanotubes is a critical issue in all these classes of actively moving materials. It is shown in this article that assembling nanotubes under the form of pure or composite fibers is an effective approach to orient carbon nanotubes on a large scale along a well defined direction. Nanotube alignment achieved via fiber drawing allows the optimization of properties of shape memory polymer fibers and electrochemical actuators. In particular, the mechanical response of pure nanotube fibers to electrical stimulations is investigated in liquid electrolytes. It is observed that the fibers can generate a stress one order of magnitude greater than that achieved with unaligned assemblies of nanotubes. We also present the properties of shape memory polymer fibers loaded with carbon nanotubes. These fibers generate a very large stress when they recover their shape after they have been stretched and cooled under tensile load. Composite nanotube polymer fibers also exhibit a temperature memory behavior, which is still raising fundamental questions regarding its microscopic origin. |
| Databáze: | OpenAIRE |
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