Anais do Workshop INEO 2023

ANALYSIS OF PVDF POLYMORPHISM PROCESSED BY ELECTROSPINNING AND CASTING FILMS

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

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Paper Title
ANALYSIS OF PVDF POLYMORPHISM PROCESSED BY ELECTROSPINNING AND CASTING FILMS
Authors
  • André Antunes da Silva
  • Pedro Leonardo Silva
  • Vagner dos Santos
  • Clarissa de Almeida Olivati
  • Roger C. Hiorns
  • 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-2023/613096-analysis-of-pvdf-polymorphism-processed-by-electrospinning-and-casting-films
ISBN
978-65-272-0088-8
Keywords
PVDF, Dissolution, Beta phase, Electrospinning.
Summary
The polymer poly(vinylidene fluoride) - PVDF is a piezoelectric material that has been widely studied due to its particular electrical and optical properties1. The PVDF beta phase is the most desirable in important technological applications such as sensors and actuators because it has better piezoelectric activities2. The objective of this work is to study the PVDF dissolution parameters in casting and nanofibers by electrospinning (for comparison) which is a simple and versatile technique to produce fibers of nanometric diameter from a sufficiently viscous polymeric solution3 for nanogenerators and sensor of pressure. These piezoelectric devices are present in several technologies using in various arrangements, that is, this technological concept allows input signals to be converted into output responses, thus enabling, through different applications, the resolution of some sensory monitoring problems and even power generation4. The PVDF was dissolved in DMF and deposited on glass plates for drying, varying its concentration from 10 to 20 %wt, dissolution time 2h temperature from 25°C to 70°C. These membranes were analyzed by FTIR to check their chemical and crystalline structures. For electrospinning, the solution was placed in a 3.0 mL syringe inside the infusion pump, setting the flow to 0.5 mL/h, keeping the needle at a distance of 15 cm from the collector. The power supply was maintaining the voltage at 15 kV ejecting the solution to the rotary collector maintained at 300 rpm. The PVDF/solvent concentration in both techniques was 15 %wt. Through the FTIR spectra we can calculate the relative percentage of the presence of the most predominant crystalline phase, comparing the ratio between beta and alpha phase present in casting PVDF and in electrospun nanofibers. Through optical microscopy (OM) and/or scanning electron microscopy (SEM) images, linearity, continuity and thickness can be observed in nanometric orders. The result of the electricity and DC conductivity tests will be used in the next step of this work to check the piezoelectricity by “fingertests”. Acknowledgements: The authors thank CNPq, LabMEV–FCT/UNESP, INEO and FAPESP, PrInt-CAPES- UNESP. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior – Brasil (CAPES) – Finance Code 001 References: [1] XUE, You et al. Materials Chemistry A, v. 10, n. 41, p. 21893-21904, 2022. [2] HE, Zhongchen et al. Polymers, v. 13, n. 2, p. 174, 2021. [3] A. Al Rai, et. al. Eng. Sci. 60,1186–1193, 2020. [4] HOSSEINI, E. S. et al. ACS applied materials & interfaces, v. 12, n. 8, p. 9008-16, 2020.
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

SILVA, André Antunes da et al.. ANALYSIS OF PVDF POLYMORPHISM PROCESSED BY ELECTROSPINNING AND CASTING FILMS.. 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-2023/613096-ANALYSIS-OF-PVDF-POLYMORPHISM-PROCESSED-BY-ELECTROSPINNING-AND-CASTING-FILMS. Access in: 20/04/2025

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