Electromagnetic, Morphological, and Electrical Characterization of POMA/Carbon Nanotubes-Based Composites

dc.contributor.authorPinto, Simone de Souza [UNIFESP]
dc.contributor.authorRezende, Mirabel Cerqueira [UNIFESP]
dc.coverageLondon
dc.date.accessioned2020-07-31T12:46:54Z
dc.date.available2020-07-31T12:46:54Z
dc.date.issued2017
dc.description.abstractThis study involves the preparation of conducting composites based on poly(o-methoxyaniline) (POMA) and carbon nanotubes (CNT) and the evaluation of them as radar absorbing materials (RAM), in the frequency range of 8.2-12.4GHz (X-band). The composites were obtained by synthesis in situ of POMA in the presence of CNT (0.1 and 0.5 wt% in relation to the o-methoxyaniline monomer). The resulting samples-POMA/CNT-0.1 wt% and POMA/CNT-0.5wt%-were incorporated in an epoxy resin matrix in the proportion of 1 and 10wt%. FT-IR analyses show that the POMA was successfully synthesized on the CNT surface. SEM analyses showthat the synthesizedPOMArecovered allCNTsurface. Electrical conductivitymeasurements showthat theCNTcontributed to increase the conductivity of POMA/CNT composites (1.5-6.7 S.cm(-1)) in relation to the neat POMA (5.4 x 10(-1) S.cm(-1)). The electromagnetic characterization involved themeasurements of complex parameters of electrical permittivity (epsilon) andmagnetic permeability (mu.), using a waveguide in the X-band. From these experimental data reflection loss (RL) simulations were performed for specimens with different thicknesses. The complex parameters show that the CNT in the composites increased epsilon and mu These results are attributed to the CNT network formation into the composites. Simulated RL curves of neat POMA and POMA/CNT in epoxy resin show the preponderant influence of POMA on all RL curves. This behavior is attributed to the efficient CNT recovering by POMA. RL results show that the composite based on 10wt% of POMA/CNT-0.5 wt% in epoxy resin (9mm thickness) presents the best RL results (approximate to 87% of attenuation at 12.4GHz).en
dc.description.affiliationUniv Fed Sao Paulo UNIFESP, Inst Sci & Technol, Rua Talim 330, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationTechnol Inst Aeronaut, Praca Mal do Ar Eduardo Gomes 50, Sao Jose Dos Campos, SP, Brazil
dc.description.affiliationUnifespInstitute of Science and Technology, Universidade Federal de São Paulo (UNIFESP), Rua Talim 330, São José dos Campos, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)/PVNS
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDFAPESP: 2010/09527-3
dc.description.sponsorshipIDFAPESP: 2014/02551-7
dc.description.sponsorshipIDCNPq: 303287/2013-6
dc.format.extent-
dc.identifierhttp://dx.doi.org/10.1155/2017/1989785
dc.identifier.citationJournal Of Nanomaterials. London, v. , p. -, 2017.
dc.identifier.doi10.1155/2017/1989785
dc.identifier.fileWOS000395144500001.pdf
dc.identifier.issn1687-4110
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/56440
dc.identifier.wosWOS:000395144500001
dc.language.isoeng
dc.publisherHindawi Ltd
dc.relation.ispartofJournal Of Nanomaterials
dc.rightsAcesso aberto
dc.titleElectromagnetic, Morphological, and Electrical Characterization of POMA/Carbon Nanotubes-Based Compositesen
dc.typeArtigo
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