Banca de QUALIFICAÇÃO: INGRID FERREIRA SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : INGRID FERREIRA SANTOS
DATE: 30/04/2026
TIME: 17:00
LOCAL: Google meet
TITLE:

Influence of Physical and Chemical Parameters on the Electrospinning of PEO/Graphene Oxide Nanofibers

KEY WORDS:

PEO– Poly(ethylene oxide); Graphene oxide; Electrospinning; Parameters; Nanofiber

PAGES: 68
BIG AREA: Engenharias
AREA: Engenharia de Materiais e Metalúrgica
SUMMARY:

The advancement of nanotechnology has driven the interest and development of nanomaterials with optimized properties, such as nanofibers produced by the electrospinning technique. This work presents a combined study on the synthesis and characterization of graphene oxide (GO) aimed at developing a polymeric composite with poly(ethylene oxide) (PEO). The main objective is to evaluate how chemical and physical parameters influence the electrospinning process of the PEO/GO solution. The GO synthesis methodology followed the modified Hummers method, involving the chemical oxidation of graphite followed by exfoliation through ultrasonic treatment and successive washings for pH stabilization. The microstructural characterization of the synthesized material was conducted using X-Ray Diffraction (DRX). The results demonstrated the effectiveness of the synthesis through the appearance of an intensity peak at 2θ=11.2∘, indicating an increase in interplanar spacing due to the insertion of functional groups—such as hydroxyl, epoxy, and carboxyl—between the graphene sheets. Furthermore, the absence of the characteristic graphite diffraction peak at 26∘ confirmed the successful oxidation and removal of the precursor graphite. It is concluded that this initial stage was successful, providing the necessary basis for the subsequent electrospinning assays of the PEO/GO composite.

COMMITTEE MEMBERS:
Presidente - 2614274 - MICHELLE CEQUEIRA FEITOR
Interno - 2550377 - THERCIO HENRIQUE DE CARVALHO COSTA
Externa à Instituição - MICHELLE DE MEDEIROS AIRES