Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
STRUCTURAL CHARACTERISTICS AND PROPERTIES OF POLYMERIC COMPOUNDS REINFORCED WITH POLYPROPYLENE MICROFIBER AND GRAPHENE OXIDE (GO)
Submission Author:
Thalyson Oliveira , GO , Brazil
Co-Authors:
Thalyson Oliveira, Maria del Pilar Hidalgo Falla
Presenter: Thalyson Oliveira
doi://10.26678/ABCM.COBEM2023.COB2023-0882
Abstract
In recent years, polymers reinforced with materials of nanometric dimensions, known as nanocomposites, have attracted great interest from researchers and designers due to the significant improvement in the protection properties of materials with a very low amount of the nano-dispersed component. Polymers reinforced with materials of nanometric dimensions, known as nanocomposites, have aroused great interest from researchers and designers due to the significant improvement in the properties of materials with a very low amount of the nanodisperse component. A variety of epoxy-based composites with different particles such as silica, clay and carbon nanotubes have been successfully prepared and their properties have been well explored. More recently, graphene and graphene oxide (GO) sheets have also been used as "nanoadditives for epoxy-based composites". The polymeric composite to be studied consists of an epoxy matrix reinforced with 5% polypropylene microfibers and 0.5% graphene oxide (GO) analyzing the mechanical behavior and the results. Bisphenol A diglycidyl ether (DGEBA) type epoxy resin will be used, duly mixed with the hardener triethylene tetramine (TETA) in stoichiometric proportions, 6mm polypropylene microfiber and processed graphene oxide. With the data and analysis of the characterization of commercial epoxy and polypropylene microfiber, the process of synthesis and characterization of graphene nanomaterials. Incorporate graphene and microfiber nanomaterials into the epoxy resin and carry out analyzes of the mechanical and chemical properties of the coatings, such as adhesion and resistance properties. In the analysis of the nanocomposite with epoxy matrix reinforced with 5% polypropylene microfibers and 0.5% graphene oxide (GO), in comparison with the other spectra, shifts of the spectral bands referring to the carbonyl groups were verified (-C Epoxy matrix + 0 .5 wt% graphene oxide + 5 wt% microfibers =O), and a small shift of the ether band (-O-C-O) for lower wavenumbers. These changes are evidence of the occurrence of strong intermolecular interactions between graphene and epoxy and they verified that this led to the shortening of carbon bonds, favoring interactions between polymeric chains, thus inducing greater crosslinking of the material. Comparing the infrared spectra, it is not possible to observe great changes in the FTIR spectra of some samples, and this may be due to a low percentage of graphene oxide nanoloads. The mechanical and thermal characterization analyzes are under development, in order to complement the research objectives.
Keywords
Composites, polypropylene microfibers, mechanical behavior, epoxy resin, graphene oxide (GO)
