Mechanical Response of Glass-Epoxy Composites with Graphene Oxide Nanoparticles

• Main Authors: Uppin, Vinayak S., Gouda, P. S. Shivakumar, Kittur, M. I., Andriyana, Andri, Ang, Bee Chin, Parveez, Bisma, Badruddin, Irfan Anjum, Javed, Syed, Kamangar, Sarfaraz
• Format: Article
• Published: MDPI 2022
• Subjects: QD Chemistry; TJ Mechanical engineering and machinery
• Online Access: http://eprints.um.edu.my/46142/; https://doi.org/10.3390/ma15238545
• Institution: Universiti Malaya

Graphene-based fillers possess exceptional properties that encourage researchers toward their incorporation in glass-epoxy (GE) polymer composites. Regarding the mechanical and wear properties of glass-epoxy composites, the effect of graphene oxide (GO) reinforced in glass-epoxy was examined. A decrease in tensile modulus and increase in tensile strength was reported for 1 wt. % of GO. A shift in glass transition temperature T-g was observed with the addition of GO. The cross-link density and storage modulus of the composite decreased with the addition of GO. The decrease in dissipation energy and wear rate was reported with the increase in GO concentration. A simple one-dimensional damage model of nonlinear nature was developed to capture the stress-strain behavior of the unfilled and filled glass-epoxy composite. Tensile modulus E, Weibull scale parameter sigma(o), and Weibull shape parameter beta were considered to develop the model. Finally, to understand the failure mechanisms in GO-filled composites, a scanning electron microscopic (SEM) examination was carried out for tensile fractured composites.