Banca de QUALIFICAÇÃO: MATHEUS MENDES DE OLIVEIRA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
DISCENTE : MATHEUS MENDES DE OLIVEIRA
DATA : 13/03/2020
HORA: 14:00
LOCAL: sala 406, 4º andar, Bloco B, Campus SA da Fundação Universidade Federal do ABC, localizada na Avenida dos Estados, 5001, Santa Terezinha, Santo André, SP
TÍTULO:

 

Influence of processing on electrical and mechanical properties of epoxy nanocomposites filled with carbon nanoparticles

PÁGINAS: 80
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Polímeros, Aplicações
RESUMO:

Advances in mechanical properties of composites over the past decades have enabled the aerospace industry to shift their fuselage design from aluminum to fiber-reinforced polymers. However, their insulating character renders the airplane structure vulnerable to serious damage when hit by lightning strikes, including embrittlement and delamination. The current solution has been the use of a metallic wire mesh bonded to the fuselage, but it adds extra weight, undermining the very advantage of using composites. Therefore, the industry would benefit from a lighter and seamless solution. Graphene nanoplatelets (GNP) and carbon nanotubes (CNT) have been used to enhance mechanical and electrical properties of epoxy-based nanocomposites. GNPs are small stacks of multilayer graphene that inherit some of the excellent mechanical and electrical properties of its single layered counterpart, but at a much lower manufacturing cost. CNTs are well known for their high conductivity and low percolation threshold, as well as high Young’s modulus. There is strong evidence in the literature that mixing both nanoparticles gives rise to synergetic effects, but there is still no consensus on many key factors in the design of these hybrid nanocomposites, especially those concerning optimized processing and ideal weight fraction. The aim of this work was to use rheological measurements to shed some light on how sonication parameters affect dispersion state in uncured GNP-CNT-epoxy hybrid nanocomposites, and then evaluate their impact on electrical and mechanical properties of cured samples. Results show that time and amplitude have great impact on these properties and confirm that careful control of these parameters are crucial in optimizing the fabrication of advanced hybrid nanocomposites.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1961116 - DEMETRIO JACKSON DOS SANTOS
Membro Titular - Examinador(a) Interno ao Programa - 2604128 - ALEXANDRE JOSE DE CASTRO LANFREDI
Membro Titular - Examinador(a) Externo à Instituição - GUILHERMINO JOSÉ MACÊDO FECHINE - UPM
Membro Suplente - Examinador(a) Interno ao Programa - 1763443 - MARCIA APARECIDA DA SILVA SPINACE
Membro Suplente - Examinador(a) Externo ao Programa - 2347767 - MATHILDE JULIENNE GISELE CHAMPEAU FERREIRA
Membro Suplente - Examinador(a) Externo ao Programa - 2604737 - EVERALDO CARLOS VENANCIO