| Texto completo | |
| Autor(es): |
Ferreira Santos, Joao Paulo
[1]
;
da Silva, Aline Bruna
[2]
;
Arjmand, Mohammad
[3]
;
Sundararaj, Uttandaraman
[3]
;
Suman Bretas, Rosario Elida
[1]
Número total de Autores: 5
|
| 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] Ctr Fed Educ Tecnol Minas Gerais, Dept Mat Engn, Av Amazonas 5253, Belo Horizonte, MG - Brazil
[3] Univ Calgary, Dept Chem & Petr Engn, Calgary, AB T2N 1N4 - Canada
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | EUROPEAN POLYMER JOURNAL; v. 101, p. 46-55, APR 2018. |
| Citações Web of Science: | 5 |
| Resumo | |
The combination of copper and dielectric materials have emerged as one of the most promising alternatives for the next generation of charge storage devices and microelectronic integrated circuits. In this work, copper nanowires (CuNW) were synthesized using a hard template technique, where copper was electrodeposited into and then liberated from porous alumina templates. Flexible nanofibers of poly(vinylidene fluoride)/copper nanowire (PVDF/CuNW) at different loadings were then obtained using the technique of electrospinning. SEM and TEM images showed that the CuNW had a straight, rigid structure with an average length and diameter of 1.5 pm and 30 nm, respectively. The morphological characterizations also revealed that the CuNW were embedded and aligned inside the nanofibers of PVDF, leading to an increase in the diameters of the generated electrospun nanofibers, e.g., 154 nm and 227 nm for pure PVDF and PVDF/CuNW (20 wt%), respectively. The polymorphic behavior of the PVDF/CuNW nanofibers was studied by FTIR and WAXD, confirming the positive impact of electrospinning on piezoelectric 13 phase formation of the PVDF matrix. Dielectric measurements indicated that the real permittivity of the mats of the nanofibers increased with CuNW loading. The ascending trend of the real permittivity with the filler content was ascribed to the formation of nanocapacitor structures, i.e., the copper conductive nanofillers acting as nanoelectrodes and the polymer matrix as nanodielectrics. Thus, the results of this study showed that the electrospun PVDF/CuNW nanofibers could be suitable in applications where flexible dielectric and piezoelectric materials are required. (AU) | |
| 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: | 15/09924-6 - Automontagem e síntese de nanocompósitos híbridos de PS-b-PVDF-b-PS/MWCNTs para aplicação em supercapacitores |
| Beneficiário: | João Paulo Ferreira Santos |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |