Banca de QUALIFICAÇÃO: EIDER HUMBERTO DE MORAES

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : EIDER HUMBERTO DE MORAES
DATA : 03/08/2022
HORA: 14:00
LOCAL: https://conferenciaweb.rnp.br/webconf/ana-968
TÍTULO:

Carbon Black and Graphene Oxide Polyaniline Nanocomposites for Supercapacitors

PÁGINAS: 76
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Polímeros, Aplicações
RESUMO:

The consumption and production of energy based on fossil fuels cause deep impact on word wide economic and environment. Therefore, other sources of energy have been studied, developed, or implemented on industry. The electrochemistry production of energy is more sustainable and it technology has gained emphasis in recent years, Electrochemistry system of storage and energy conversion include batteries, fuel cells and electrochemical capacitors are used on a start-stop system, in combination with lithium batteries applications. The aim of this work are the synthesis and characterization of polyaniline (PANI) matrix nanocomposites containing carbon black (CB) and graphene oxide (GO) nanomaterials as disperse phase as to obtain electrodes, which can used in supercapacitors, with the aim to improve the charge density and the dimensional stability of the system, which may be used in a vehicle start-stop system. The results obtained up to now showed that the synthesized materials were obtained as follows: PANI was obtained in the emeraldine base oxidation state (PANI-EB) and the graphene oxide (GO) form was confirmed. The absorption spectroscopic studies in the ultraviolet and visible (UV-Vis) region and in infrared (FTIR) region showed the PANI-EB characteristics bands. From the graphite oxide sample that was synthesized was possible to obtain graphene oxide dispersions in ethanol and in aqueous medium, respectively. The GO dispersions were prepared by using two different approaches, by using a ultrasound bath and by using a in situ titanium ultrasound probe, where the SEM results showed the GO nanoplatelets size reduction in the presence of the in situ titanium ultrasound probe. From the SEM results it was observed PANI-EB samples with granular morphology, which agrees with the results found in the literature.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1676360 - ANA MELVA CHAMPI FARFAN
Membro Titular - Examinador(a) Interno ao Programa - 1669182 - JOSE FERNANDO QUEIRUGA REY
Membro Titular - Examinador(a) Externo ao Programa - 1544381 - MAURO COELHO DOS SANTOS
Membro Suplente - Examinador(a) Interno ao Programa - 2390704 - MARA CRISTINA LOPES DE OLIVEIRA
Membro Suplente - Examinador(a) Externo ao Programa - 1545738 - MARCIA TSUYAMA ESCOTE