Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation
| Autor(a) principal: | |
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| Data de Publicação: | 2022 |
| Outros Autores: | , , , |
| Tipo de documento: | Artigo |
| Idioma: | eng |
| Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
| Texto Completo: | https://hdl.handle.net/1822/82480 |
Resumo: | The Supporting Information is available free of charge at: https://pubs.acs.org/doi/10.1021/acsapm.2c00084 |
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Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulationthermoplastic compositeselectromagnetic interference (EMI) shieldingelectrical conductivitypolyamide 6microencapsulation strategyEngenharia e Tecnologia::Engenharia dos MateriaisScience & TechnologyIndústria, inovação e infraestruturasThe Supporting Information is available free of charge at: https://pubs.acs.org/doi/10.1021/acsapm.2c00084Thermoplastic composites integrating carbon nanotubes (CNT) and micron-sized metal particles dispersed in polymer matrices can address emerging multifunctional needs, e.g., good electrical conductivity and electromagnetic interference (EMI) shielding combined with easy processing and affordable costs. Herein, an approach based on reactive microencapsulation is reported to prepare polyamide 6 (PA6)-based composites comprising binary loads of CNT and Al, Cu, or Fe particles. The microencapsulation is performed by activated anionic polymerization of ε-caprolactam in solution, in the presence of the metal/CNT loads. The resulting hybrid microparticles are compression-molded into plates containing effective metal/CNT loads in the range of 12–17 wt %. Among the materials synthesized, the one containing Al/CNT binary load (3:7 wt %) displays the highest EMI shielding effectiveness (SE) of 43.5 dB at 12 GHz, with a 2 mm thickness and an electrical conductivity σdc of 6.61 × 10–3 S/cm. A synergetic effect is observed in all of the metal/CNT PA6 samples in terms of both σdc and SE increase. Evidently, the presence of metal particles well dispersed in the conductive CNT network contributes to the mobility of the carriers and thus to the effective attenuation of the electromagnetic waves. Therefore, the binary composites of this study can be efficient thermoplastic EMI shielding materials.The authors gratefully acknowledge the technical support of Hugo Mostardinha from the Instituto de Telecomunicações Aveiro during the EMI shielding measurements and the financial support of Fundação para a Ciência e Tecnologia (FCT), Project UID/CTM/50025/2019. F.M.O. thanks FCT for the Ph.D. grant PD/BD/114372/2016 (AdvaMTech Ph.D. Program in Advanced Materials and Processing). The assistance of Prof. Nuno Carvalho from the University of Aveiro, Portugal, in the EMI shielding experiments is also gratefully acknowledged.ACS PublicationsUniversidade do MinhoOliveira, Filipa M.Martins, LuísDencheva, Nadya VasilevaEzquerra, Tiberio A.Denchev, Z.20222022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/82480engOliveira, F. M., Martins, L., Dencheva, N. V., Ezquerra, T. A., & Denchev, Z. Z. (2022, March 31). Tunable Electromagnetic Interference Shielding Properties of Binary Thermoplastic Composites Prepared by Reactive Microencapsulation. ACS Applied Polymer Materials. American Chemical Society (ACS). http://doi.org/10.1021/acsapm.2c000842637-610510.1021/acsapm.2c00084https://pubs.acs.org/doi/full/10.1021/acsapm.2c00084info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:33:52Zoai:repositorium.sdum.uminho.pt:1822/82480Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:29:27.153070Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
| dc.title.none.fl_str_mv |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| title |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| spellingShingle |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation Oliveira, Filipa M. thermoplastic composites electromagnetic interference (EMI) shielding electrical conductivity polyamide 6 microencapsulation strategy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Indústria, inovação e infraestruturas |
| title_short |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| title_full |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| title_fullStr |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| title_full_unstemmed |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| title_sort |
Tunable electromagnetic interference shielding properties of binary thermoplastic composites prepared by reactive microencapsulation |
| author |
Oliveira, Filipa M. |
| author_facet |
Oliveira, Filipa M. Martins, Luís Dencheva, Nadya Vasileva Ezquerra, Tiberio A. Denchev, Z. |
| author_role |
author |
| author2 |
Martins, Luís Dencheva, Nadya Vasileva Ezquerra, Tiberio A. Denchev, Z. |
| author2_role |
author author author author |
| dc.contributor.none.fl_str_mv |
Universidade do Minho |
| dc.contributor.author.fl_str_mv |
Oliveira, Filipa M. Martins, Luís Dencheva, Nadya Vasileva Ezquerra, Tiberio A. Denchev, Z. |
| dc.subject.por.fl_str_mv |
thermoplastic composites electromagnetic interference (EMI) shielding electrical conductivity polyamide 6 microencapsulation strategy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Indústria, inovação e infraestruturas |
| topic |
thermoplastic composites electromagnetic interference (EMI) shielding electrical conductivity polyamide 6 microencapsulation strategy Engenharia e Tecnologia::Engenharia dos Materiais Science & Technology Indústria, inovação e infraestruturas |
| description |
The Supporting Information is available free of charge at: https://pubs.acs.org/doi/10.1021/acsapm.2c00084 |
| publishDate |
2022 |
| dc.date.none.fl_str_mv |
2022 2022-01-01T00:00:00Z |
| dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
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info:eu-repo/semantics/article |
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article |
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publishedVersion |
| dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/82480 |
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https://hdl.handle.net/1822/82480 |
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eng |
| language |
eng |
| dc.relation.none.fl_str_mv |
Oliveira, F. M., Martins, L., Dencheva, N. V., Ezquerra, T. A., & Denchev, Z. Z. (2022, March 31). Tunable Electromagnetic Interference Shielding Properties of Binary Thermoplastic Composites Prepared by Reactive Microencapsulation. ACS Applied Polymer Materials. American Chemical Society (ACS). http://doi.org/10.1021/acsapm.2c00084 2637-6105 10.1021/acsapm.2c00084 https://pubs.acs.org/doi/full/10.1021/acsapm.2c00084 |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
| dc.publisher.none.fl_str_mv |
ACS Publications |
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ACS Publications |
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reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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