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Electromagnetic shielding of polypyrrole-sawdust composites: polypyrrole globules and nanotubes

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dc.title Electromagnetic shielding of polypyrrole-sawdust composites: polypyrrole globules and nanotubes en
dc.contributor.author Babayan, Vladimir Artur
dc.contributor.author Kazantseva, Natalia E.
dc.contributor.author Moučka, Robert
dc.contributor.author Stejskal, Jaroslav
dc.relation.ispartof Cellulose
dc.identifier.issn 0969-0239 Scopus Sources, Sherpa/RoMEO, JCR
dc.date.issued 2017
utb.relation.volume 24
utb.relation.issue 8
dc.citation.spage 3445
dc.citation.epage 3451
dc.type article
dc.language.iso en
dc.publisher Springer Netherlands
dc.identifier.doi 10.1007/s10570-017-1357-z
dc.relation.uri https://link.springer.com/article/10.1007/s10570-017-1357-z
dc.subject Composite en
dc.subject Conducting polymer en
dc.subject Nanotubes en
dc.subject Polypyrrole en
dc.subject Shielding effectiveness en
dc.subject Wood sawdust en
dc.description.abstract Economic and efficient materials for the shielding of electromagnetic interference are required by many applications. Electrically conducting composite materials based on wood sawdust modified by polypyrrole (PPy) with different morphology, globular and nanotubular, were prepared through in-situ polymerization of pyrrole with the use of iron (III) chloride as an oxidant. The effect of PPy morphology and content in composite with sawdust on the DC conductivity and shielding effectiveness (SE) were investigated. Composites of sawdust with globular PPy demonstrated higher DC conductivity as compared to those with PPy nanotubes as long as PPy content was less or equal to 18 vol.%. Above this concentration the opposite trend was observed. The SE of composites was evaluated theoretically in the radio-frequency range, and measured by waveguide method in the frequency range 5.85–8.2 GHz. The SE increased with increase in DC conductivity, and good agreement between the theoretically calculated SE and experimental results was achieved. The SE of the composites extended over 20 dB level above 18 vol.% PPy at the thickness of the order of 10 μm. Polypyrrole nanotubes perfomed better than globular PPy at high conducting polymer content. The composites are good candidates for the application as shielding materials in the microwave band. © 2017, Springer Science+Business Media B.V. en
utb.faculty University Institute
dc.identifier.uri http://hdl.handle.net/10563/1007279
utb.identifier.obdid 43876719
utb.identifier.scopus 2-s2.0-85020755480
utb.identifier.wok 000405612000028
utb.identifier.coden CELLE
utb.source j-scopus
dc.date.accessioned 2017-09-03T21:40:08Z
dc.date.available 2017-09-03T21:40:08Z
dc.description.sponsorship Ministry of Education, Youth and Sports of the Czech Republic (NPU I) [LO1504]; Czech Science Foundation [16-02787S]
utb.ou Centre of Polymer Systems
utb.contributor.internalauthor Babayan, Vladimir Artur
utb.contributor.internalauthor Kazantseva, Natalia E.
utb.contributor.internalauthor Moučka, Robert
utb.wos.affiliation [Babayan, Vladimir; Kazantseva, Natalia E.; Moucka, Robert] Tomas Bata Univ Zlin, Ctr Polymer Syst, T Bata Ave 5678, Zlin 76001, Czech Republic; [Stejskal, Jaroslav] Acad Sci Czech Republic, Inst Macromol Chem, Prague 16206 6, Czech Republic
utb.scopus.affiliation Centre of Polymer Systems, Tomas Bata University in Zlin, T. Bata Ave. 5678, Zlin, Czech Republic; Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Prague 6, Czech Republic
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