Banca de QUALIFICAÇÃO: FELIPE MENDONÇA FONTES GALVÃO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : FELIPE MENDONÇA FONTES GALVÃO
DATE: 17/02/2020
TIME: 14:00
LOCAL: CENTRO DE TECNOLOGIA
TITLE:

SMART TEXTILE SUPERCAPACITORS NANOCOATED WITH GRAPHENE OXIDE AND REDUCED GRAPHENE OXIDE: SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL EVALUATION

KEY WORDS:

Graphene oxide; Reduced graphene oxide, Smart Textiles, Nanotechnology, Supercapacitors

PAGES: 65
BIG AREA: Engenharias
AREA: Engenharia Química
SUBÁREA: Tecnologia Química
SPECIALTY: Têxteis
SUMMARY:

Knowledge of the fundamental structure and graphene connections, as well as the scope of its applications, such as in the fields of physics, chemistry and materials science, have grown exponentially in the last decade. After 15 years of its discovery, studies of its use in renewable energies, energy storage, heterogenic photocatalysis, biomedical engineering sensors, biotechnology, antennas, composites and among others, has made this material one of the objects of studies and obtaining numerous patents today. Advances in these areas were driven by improvements in the methods used to synthesize and characterize graphene oxide (OG) as well as its reduced phase , o (OGR). On the other hand, there has been a strong demand for new technologies for low-cost flexible electronic systems applications with the ability to store energy. Thus, this work aims at the synthesis, characterization and immobilization of graphene oxide (OG) using the Hummer's method. Reduced graphene oxide sinthesis (GR) was performed by different means: using sodium ditionite, ascorbic acid, and Goldred Eko. Then, the OG and RG were immobilized in mesh fabric structures of soybean regenerated fibers (SPF) by layer-by-layer and silk screen printing method. The samples were characterized as their morphological and microstructural properties via X-ray Diffraction, High Resolution Transmission Electron Microscopy (HRTEM), MEV/FEG, Raman Spectroscopy, proving the efficiency of the synthesis method. The evaluation of the immobilization of the OG and GR on soybean meshes was monitored via diffuse reflectance spectroscopy attenuated and as a comparative result, ΔE was calculated, demonstrating that the darker the sample, the more OG and GR were immobilized. Thus, the synthesis methods as well as the chemical processes used prove the efficiency of obtaining supercapacitive intelligent textiles using oxidized and reduced graphene.

BANKING MEMBERS:
Presidente - 2941160 - JOSE HERIBERTO OLIVEIRA DO NASCIMENTO
Interna - 2614285 - KESIA KARINA DE OLIVEIRA SOUTO SILVA
Externo ao Programa - 2524053 - ANTONIO LUIZ PEREIRA DE SIQUEIRA CAMPOS
Externa ao Programa - 971.439.364-72 - ELAINE CRISTINA MARTINS DE MOURA SANTOS - UFRN