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Development of magnetoelectric CoFe2O4 /poly(vinylidene fluoride) microspheres
Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetostrictive CoFe 2 O 4 (CFO), a novel morphology for polymer-based ME materials, have been developed by an electrospray process. The CFO nanoparticle content in the (3-7 μm diameter) microspheres reaches va...
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Main Authors: | , , , , , , , |
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Format: | Article |
Language: | English |
Online Access: | Get full text |
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Summary: | Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetostrictive CoFe
2
O
4
(CFO), a novel morphology for polymer-based ME materials, have been developed by an electrospray process. The CFO nanoparticle 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 (460-465 °C) of the polymer matrix. The multiferroic microspheres show a maximum piezoelectric response |
d
33
| 30 pC N
−1
, leading to a magnetoelectric response of Δ|
d
33
| 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.
Magnetoelectric microspheres based on piezoelectric poly(vinylidene fluoride) (PVDF) and magnetostrictive CoFe
2
O
4
(CFO), a novel morphology for polymer-based ME materials, have been developed by an electrospray process. |
---|---|
ISSN: | 2046-2069 |
DOI: | 10.1039/c5ra04409j |