Flexible conductive poly(styrene-butadiene-styrene)/carbon nanotubes nanocomposites: Self-assembly and broadband electrical behavior

Autor(es)

Ferreira Santos, Joao Paulo ^[1] ; Franca Melo, Guilherme Henrique ^[1] ; Goncalves, Andre Marino ^[2] ; Eiras, Jose Antonio ^[2] ; Suman Bretas, Rosario Elida ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Mat Engn, Rodovia Washington Luis, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Phys, Ferro Mat Grp, Rodovia Washington Luis, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Applied Polymer Science; v. 135, n. 34 SEP 10 2018.
• Citações Web of Science: 2

Resumo

Flexible conductive nanocomposites with the ability of self-assembly into well-ordered structures are promising multifunctional materials for energy conversion and storage devices. In this work, flexible nanocomposites based on multi-walled carbon nanotubes (MWCNTs) and poly(styrene-butadiene-styrene) (SBS) were obtained by solution casting, followed by a post-annealing treatment, during 7 days at 110 degrees C, to enable the self-organization of the SBS. The impact of the MWCNTs on the self-assembly was studied by atomic force microscopy and Small angle X-rays scattering, and the conductivity of these nanocomposites was analyzed over the broadband frequency range, that is, 10(-1)-10(6) Hz. The results revealed that the lower MWCNTs loadings (approximate to 0.2 v %) were the most suitable to achieve a conductive network through the SBS, maintaining self-assembled domains. These domains include hexagonally packed cylinders and alternating lamellae. Furthermore, at loadings above 1 v %, the impact of further MWCNTs addition on the conductivity was marginal over the whole frequency range and the self-assembly tendency was progressively reduced. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46650. (AU)

• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs
• Processo FAPESP: 14/17597-2 - Obtenção e estudo da estruturação de nanocompósitos híbridos baseados em copolímeros em bloco para aplicação em supercapacitores
• Beneficiário: João Paulo Ferreira Santos
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 16/03667-4 - Eletrofiação de nanofibras cerâmicas para uso em nanocompósitos poliméricos
• Beneficiário: Rosario Elida Suman Bretas
• Modalidade de apoio: Bolsas no Exterior - Pesquisa
• Processo FAPESP: 13/03118-2 - Visualização, caracterização e manipulação de domínios ferroelétricos e magnéticos em multiferróicos
• Beneficiário: André Marino Gonçalves
• Modalidade de apoio: Bolsas no Brasil - Doutorado