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Magnetic polymeric composites as absorbers of electromagnetic energy = Magnetické polymerní kompozity jako absorbéry elektromagnetické energie
Autor: Natalija Kazanceva
ISBN: 9788074548710
OKCZID: 128281213
Půjčte si tento titul v knihovně přes portál Knihovny.cz
Citace (dle ČSN ISO 690):
KAZANCEVA, Natalija. Magnetic polymeric composites as absorbers of electromagnetic energy =: Magnetické polymerní kompozity jako absorbéry elektromagnetické energie. Zlín: Tomas Bata University in Zlín, 2020. 66 stran. Qualifying lecture for adjunct professorship.
Anotace
Magnetic materials and polymeric composites based on them possess theproperty to absorb electromagnetic energy and convert it to Joule heat. Thisproperty is used for the design of radio-absorbers (RAs) to minimizeelectromagnetic radiation and interference, and is also proposed to be used intumour-specific hyperthermia, when inductive heating is applied after theinjection of magnetic material (the so-called heat mediator) into the tumour. Thegoal of this lecture book is to demonstrate the results obtained by the author andher research team in the development of ‘magnetic polymeric composites’ forspecific applications as mentioned above.The development of magnetic-type RAs is usually aimed at the fabrication ofpolymeric composites based on a properly selected magnetic filler material(carbonyl iron, spinel-type ferrites, hexagonal ferrites, alloys, etc.) with givenvolume fraction. A more efficient absorption of electromagnetic radiation can beachieved by using materials with the following set of electromagnetic properties:high permeability, high magnetic losses, a suitable form of the frequencydependence of permeability, and a proper ratio between the permeability andpermittivity. The author demonstrated and reported for the first time thepossibility to change the electromagnetic properties of composites by using coreshell-type magnetic fillers, namely, multi-domain ferrite particles (cores) coatedin-situ by polyaniline (PANI). It is established that the electromagnetic propertiesof such core-shell particles can be matched to the properties of a conductivepolymer (the morphology, electrical conductivity, complex permittivity, andinterfacial surface energy), which, in turn, can be controlled through the changeof the synthesis conditions. As a result, single-layer RAs operating in a widefrequency range were developed. This work was done in cooperation with theInstitute of Macromolecular Chemistry, Academy of Sciences of the CzechRepublic (Prague), the Institute of Macromolecular Compounds, RussianAcademy of Sciences (St. Petersburg), and the Polymer Institute of the SlovakAcademy of Sciences.
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