MORPHOLOGICAL CHARACTERIZATION AND ELECTROMECHANICAL TEST OF POLY(VINYLIDENE FLUORIDE) (PVDF) NANOFIBERS WITH REDUCED GRAPHENE OXIDE (RGO) FOR APPLICATION IN PIEZOELECTRIC DEVICE

Published in 12/12/2023 - ISBN: 978-65-272-0088-8

Paper Title
MORPHOLOGICAL CHARACTERIZATION AND ELECTROMECHANICAL TEST OF POLY(VINYLIDENE FLUORIDE) (PVDF) NANOFIBERS WITH REDUCED GRAPHENE OXIDE (RGO) FOR APPLICATION IN PIEZOELECTRIC DEVICE
Authors
  • Beatriz Marques Carvalho
  • Vitor Hugo Uzeloto Fernandes Mingroni (ME); FCT-UNESP
  • Bruno Henrique de Santana Gois
  • Lucas Michelão Martins
  • Luiz Carlos da Silva Filho
  • Clarissa de Almeida Olivati
  • Deuber Lincon da Silva Agostini
Modality
Pôster
Subject area
Dispositivos eletrônicos e ópticos (OLED/OFET/OPVs/etc.)
Publishing Date
12/12/2023
Country of Publishing
Brasil
Language of Publishing
Inglês
Paper Page
https://www.even3.com.br/anais/workshop-do-ineo-2023/613207-morphological-characterization-and-electromechanical-test-of-poly(vinylidene-fluoride)-(pvdf)-nanofibers-with-red
ISBN
978-65-272-0088-8
Keywords
Nanofibers, electrospinning, piezoelectricity
Summary
Poly(vinylidene fluoride) (PVDF) is a semi-crystalline thermoplastic fluoropolymer, soluble in organic solvents, has properties of high thermal stability, high mechanical strength, good processability, is light and flexible [1], is considered an electronic electroactive polymer [2] and has the piezoelectric effect, which makes it interesting for several applications in the technological area. Reduced graphene oxide (rGO) is a graphene derivative and can be obtained from the thermal or chemical reduction of graphene oxide (GO). Unlike GO, rGO is considered a conductive material [3]. Among the techniques used to produce nanofibers, electrospinning stands out, a simple and versatile technique capable of producing fibers with varied composition, morphology and diameters ranging from nanometers to micrometers. Polymeric nanofibers have the advantages of high surface area, porous structure and electrical conductivity [4]. In addition, the electrospinning process allows obtaining PVDF with good piezoelectric properties [5]. In view of this, there is an interest in analyzing the influence of rGO on PVDF membranes, for this, rGO/PVDF nanofibers were obtained using the electrospinning technique. Three samples were prepared, one of pure PVDF and two of rGO/PVDF varying the concentration of rGO (4 and 8 %wt), using dimethylformamide (DMF) as solvent. Subsequently, the electrospun nanofibers were analyzed by morphological characterization through scanning electron microscopy (SEM), making it possible to observe their morphology and diameter. Then, they were analyzed using an electromechanical test, which consisted of monitoring the current and voltage by applying mechanical stimuli to the samples, with which it was possible to analyze the piezoelectric response of the nanofibers. Thus, graphs of i vs t (current versus time) and V vs t (voltage versus time) were generated simultaneously, allowing the power calculation. From the results obtained by SEM, it was determined that it was possible to obtain nanofibers in considerable quantity and morphology and average diameter below 400 nm. With the analysis of the electromechanical test, it was noticed that the pure PVDF nanofibers presented a better piezoelectric response, it was observed that as the amount of rGO increased to 4 and 8 wt% the piezoelectric response decreased. Therefore, a higher amount of rGO didn’t contribute positively to the piezoelectric response of PVDF. [1] ZHANG, J. et al. Synergetic effects of oxidized carbon nanotubes and graphene oxide on fouling control and anti-fouling mechanism of polyvinylidene fluoride ultrafiltration membranes. Journal of Membrane Science, v. 448, p. 81 – 92, 2013. [2] LOPES, A.; MARTINS, P.; LANCEROS-MENDEZ, S. Polímeros piezoelétricos: Caraterísticas, aplicações, perspetivas. Gazeta da Física, v. 37, n. 3, p. 2-6, 2014. [3] BADHULIKA, Sushmee et al. Graphene hybrids: synthesis strategies and applications in sensors and sensitized solar cells. Frontiers in chemistry, v. 3, p. 38, 2015. [4] MERCANTE, Luiza A. et al. Nanofibras eletrofiadas e suas aplicações: avanços na última década. Química Nova, v. 44, p. 717-736, 2021. [5] LEI, Tingping et al. Direct fabrication of polymer nanofiber membrane for piezoelectric vibration sensor. In: SENSORS, 2011 IEEE. IEEE, 2011. p. 1367-1370.
Title of the Event
Workshop do INEO 2023
City of the Event
Nazaré Paulista
Title of the Proceedings of the event
Anais do Workshop INEO 2023
Name of the Publisher
Even3
Means of Dissemination
Meio Digital
DOI
LinkGet DOI

How to cite

CARVALHO, Beatriz Marques et al.. MORPHOLOGICAL CHARACTERIZATION AND ELECTROMECHANICAL TEST OF POLY(VINYLIDENE FLUORIDE) (PVDF) NANOFIBERS WITH REDUCED GRAPHENE OXIDE (RGO) FOR APPLICATION IN PIEZOELECTRIC DEVICE.. In: Anais do workshop INEO 2023. Anais...Nazaré Paulista(SP) Hotel Estância Atibainha, 2023. Available in: https//www.even3.com.br/anais/workshop-do-ineo-2023/613207-MORPHOLOGICAL-CHARACTERIZATION-AND-ELECTROMECHANICAL-TEST-OF-POLY(VINYLIDENE-FLUORIDE)-(PVDF)-NANOFIBERS-WITH-RED. Access in: 23/06/2024

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