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Controlling Dielectric and Magnetic Properties of PVdFMagnetite Nanocomposite Fibre Webs
Joint Authors
Russell, S. J.
Venugopal, A. P.
Cespedes, O.
Source
International Journal of Polymer Science
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-27
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
The ability of filtration and separation media containing fibres to remove impurities from oil, water, and blood can be enhanced using magnetic fields.
The ability to regulate the dielectric and magnetic behaviour of fibrous webs in terms of superparamagnetic or ferromagnetic properties by adjusting material composition is fundamental to meeting end-use requirements.
Electrospun fibres were produced from PVdF (polyvinylidene fluoride) and nanomagnetite (Fe3O4 nanoparticles) from solutions of PVdF in dimethylacetamide containing Fe3O4 nanoparticle contents ranging from 3 to 10 wt%.
Fibre dimensions, morphology, and nanoparticle agglomeration were characterised by environmental scanning electron microscopy (ESEM) and field emission gun transmission electron microscopy (FEGTEM).
Dielectric behaviour of the fibre webs was influenced by web porosity and the Fe3O4 nanoparticle content.
Impedance analysis of the webs indicated an increase in dielectric constant of ∼80% by the addition of 10 wt% Fe3O4 nanoparticles compared to 100 wt% PVdF.
The dielectric constants of the webs were compared with those obtained from the theoretical mixing models of Maxwell and Lichtenecker.
Vibrating sample magnetometer (VSM) magnetisation measurements indicated a blocking temperature above 300 K suggesting ferrimagnetic rather than superparamagnetic behaviour as a result of Fe3O4 nanoparticle agglomeration within fibres.
American Psychological Association (APA)
Venugopal, A. P.& Cespedes, O.& Russell, S. J.. 2014. Controlling Dielectric and Magnetic Properties of PVdFMagnetite Nanocomposite Fibre Webs. International Journal of Polymer Science،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1037492
Modern Language Association (MLA)
Venugopal, A. P.…[et al.]. Controlling Dielectric and Magnetic Properties of PVdFMagnetite Nanocomposite Fibre Webs. International Journal of Polymer Science No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1037492
American Medical Association (AMA)
Venugopal, A. P.& Cespedes, O.& Russell, S. J.. Controlling Dielectric and Magnetic Properties of PVdFMagnetite Nanocomposite Fibre Webs. International Journal of Polymer Science. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1037492
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1037492