Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
3D Stereolithography printing of graphene reinforced nanocomposites: chemical and thermal analysis
Submission Author:
Rafael Perottoni , RS
Co-Authors:
Rafael Perottoni, Natalia Daudt, Fellipe Fiorelli Talamini, Juliana Rosemara Felisberto da Silva, Cândida Brandl, Matheus Klement
Presenter: Rafael Perottoni
doi://10.26678/ABCM.COBEM2023.COB2023-1192
Abstract
The combination of stiffness, strength and low density makes graphene an attractive material for use as reinforcement material in composites. Graphene based composite have a large potential for future applications in medical, automotive, aerospace, electrical and others industries. Stereolithography (SLA) is an additive manufacturing (AM) which enables to produce complex shape parts with high resolution in a fast time. SLA is a lithography-based process which involves selective curing of a photopolymerizable resin trough UV light, commonly a digital light processing is used In spite of the growing interest in the AM technologies and potential benefits of graphene reinforcement to improve the properties of SLA parts; there are few studies focused on SLA processing of nanoreinforced photopolymers. Therefore, this study aims to determine the effect of graphene addition on chemical and thermal characteristics of polymeric matrix composite fabricated by SLA. For that, Graphene was added into a standard photopolymerizable acrylic resin. The graphene- resin mixture was homogenized for 180 min under 60 rpm. Afterwards, samples without and with 0.3 and 0.5% graphene were 3D printed in an SLA printer. The effect of graphene addition was investigated by thermogravimetric analysis (TGA), Differential Scanning Calorimetry (DSC) and Infrared Spectrometry (FTIR). In this study, we will present the effect of graphene in the melting and crystallization behavior, heat capacity, thermal stability, phase transitions and molecular structure. Graphene addition resulted in a minimal modification of polymeric structure however it had a significant impact in thermal properties, for demonstration the melting point increased more than 20 o C. Mechanical properties of polymeric matrix composites are strong related to their thermal behavior. Therefore, in our ongoing study we will determine the effect of graphene addition on the mechanical properties such as strength, stiffness and thermal properties was investigated. By understanding the effect of graphene in the thermal behavior and chemical structure of the polymer we expected to be able to predict the mechanical behavior and tailor composite composition in order to achieve optimum properties for a specific application.
Keywords
graphene, Stereolithography, 3D printing, Nanocomposites
