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

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

Paper Title

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

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: 15/05/2025