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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Remarkable change in the broadband electrical behavior of poly(vinylidene fluoride)-multiwalled carbon nanotube nanocomposites with the use of different processing routes

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Author(s):
Ferreira Santos, Joao Paulo [1] ; Carvalho, Benjamim de Melo [2] ; Suman Bretas, Rosario Elide [1]
Total Authors: 3
Affiliation:
[1] Univ Fed Sao Carlos, Dept Mat Engn, Rodovia Washington Luis, Km 235, POB 676, BR-13565905 Sao Carlos, SP - Brazil
[2] Univ Estadual Ponta Grossa, Dept Mat Engn, Ave Gen Carlos Cavalcanti 4748, BR-84030900 Ponta Grossa, Parana - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Applied Polymer Science; v. 136, n. 17 MAY 5 2019.
Web of Science Citations: 0
Abstract

Poly(vinylidene fluoride) (PVDF) nanocomposites have plenty of applications in the electronic realm. In this study, we produced nanocomposites based on PVDF and multiwalled carbon nanotubes (MWCNTs), with various MWCNT loadings, using three different processing routes: solution mixing, melt mixing, and electrospinning. The broadband electrical behavior of these nanocomposites was studied and compared via impedance spectroscopy. The morphologies of the nanocomposites were characterized by transmission electron microscopy and scanning electron microscopy. The results reveal that the electrical behaviors of the samples were completely different according to the processing route used. Solution mixing was the most suitable method for producing nanocomposites with the highest conductivities, at low MWCNT loadings, whereas electrospinning was the most suitable method for producing nanocomposites with the lowest dielectric permittivity. These differences were attributed to the different arrangements of the MWCNTs caused by the different processes. Although the solution-mixed samples exhibited long and twisted MWCNTs, the melt-mixed samples had shorter MWCNTs, and the electrospun samples had MWCNTs embedded and aligned inside the insulating polymer nanofibers. Thus, these results project a vast horizon for tailoring the structure and thereby the broadband electrical behavior of PVDF-MWCNT nanocomposites for different types of applications. (c) 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47409. (AU)

FAPESP's process: 14/17597-2 - Hybrid nanocomposites based on block copolymers for application in supercapacitors
Grantee:João Paulo Ferreira Santos
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 13/03118-2 - Visulization, characterization and manipulation of ferroelectric and magnetic domains in multiferroics
Grantee:André Marino Gonçalves
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 15/23329-3 - Development of polymeric nanocomposites for different applications in energy
Grantee:Rosario Elida Suman Bretas
Support type: Regular Research Grants
FAPESP's process: 16/03667-4 - Electrospinning of ceramic nanofibers for polymeric nanocomposites
Grantee:Rosario Elida Suman Bretas
Support type: Scholarships abroad - Research
FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
Grantee:Elson Longo da Silva
Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC