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

Author(s)

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

Affiliation

^[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

• Document type: Journal article
• Source: Journal of Applied Polymer Science; v. 135, n. 34 SEP 10 2018.
• Web of Science Citations: 2

Abstract

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)

• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC
• FAPESP's process: 14/17597-2 - Hybrid nanocomposites based on block copolymers for application in supercapacitors
• Grantee: João Paulo Ferreira Santos
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 16/03667-4 - Electrospinning of ceramic nanofibers for polymeric nanocomposites
• Grantee: Rosario Elida Suman Bretas
• Support Opportunities: Scholarships abroad - Research
• FAPESP's process: 13/03118-2 - Visulization, Characterization and Manipulation of Ferroelectric and Magnetic Domains in Multiferroics
• Grantee: André Marino Gonçalves
• Support Opportunities: Scholarships in Brazil - Doctorate