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https://hdl.handle.net/1822/38875
Título: | Development of magnetoelectric CoFe2O4/poly(vinylidene fluoride) microspheres |
Autor(es): | Gonçalves, R. Martins, Pedro Libânio Abreu Correia, D. M. Sencadas, Vítor João Gomes Silva Vilas, J. L. León, L. M. Botelho, Gabriela Lanceros-Méndez, S. |
Data: | 2015 |
Editora: | Royal Society of Chemistry |
Revista: | RSC Advances |
Citação: | Goncalves, R., Martins, P., Correia, D. M., Sencadas, V., Vilas, J. L., Leon, L. M., . . . Lanceros-Mendez, S. (2015). Development of magnetoelectric CoFe2O4/poly(vinylidene fluoride) microspheres. RSC Advances, 5(45), 35852-35857. doi: 10.1039/c5ra04409j |
Resumo(s): | Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetrostrictive CoFe2O4 (CFO), a novel morphology for polymer-based ME material, have been developed by an electrospray process. The CFO nanoparticles content in the (3-7 μm diameter) microspheres reaches values up to 27 wt.%, despite their concentration in the starting solution reaching values up to 70 wt.%. Additionally, the inclusion of magnetostrictive nanoparticles into the polymer spheres has no relevant effect on the piezoelectric β-phase content (≈60%), crystallinity (40%) and the onset degradation temperature (460º-465ºC) of the polymer matrix. The multiferroic microspeheres show a maximum piezoelectric reponse |d33|≈30 pC.N-1, leading to a magnetoelectric response of Δ|d33|≈5 pC.N-1 obtained when a 220 mT DC magnetic field was applied. It is also shown that the interface between CFO nanoparticles and PVDF (from 0 to 55%) has a strong influence on the ME response of the microspheres. The simplicity and the scalability of the processing method suggest a large application potential of this novel magnetoelectric geometry in areas such as tissue engineering, sensors and actuators. |
Tipo: | Artigo |
URI: | https://hdl.handle.net/1822/38875 |
DOI: | 10.1039/c5ra04409j |
ISSN: | 2046-2069 |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CDF - FCD - Artigos/Papers (with refereeing) CDQuim - Artigos (Papers) |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Goncalves_II_2015.pdf | 923,17 kB | Adobe PDF | Ver/Abrir |