resumo
For the development of graphene-based materials (GBM) polymer nanocomposites, aimed for structural applications, the physicochemical properties of several commercial graphene oxide (GO) and reduced graphene oxide (rGO), were evaluated by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, atomic force microscopy (AFM) and scanning electron microscopy (SEM). Through the FTIR spectra, it was observed molecular vibration frequencies in GO and rGO samples, including different types of oxygen functionalities. Raman spectra indicated a poor exfoliation of GO samples and the characteristic peaks D and G of rGO were identified. AFM analysis indicate a high average thickness of the sheets as compared to graphene monolayer (0.345 nm). SEM images show aggregation tendency of the GO and rGO samples. This work highlights the importance of characterizing commercial GBM samples before using them for applications in polymer nanocomposites. (C) 2018 Elsevier Ltd. All rights reserved.
palavras-chave
OXIDE
categoria
Materials Science
autores
de Lima, LRM; Martins, FP; Lagarinhos, JN; Santos, L; Lima, P; Torcato, R; Marques, PAAP; Rodrigues, DL; Melo, S; Grilo, J; Oliveira, JM
nossos autores
Luiza Rodrigues Melo de Lima
Estudante de doutoramento
Ricardo Torcato
Professor Adjuntoagradecimentos
The authors would like to acknowledge the financial support from SIM T-RTM project. This is a project in collaboration with Simoldes Plasticos, S.A., and co-financed under Portugal 2020 and European Regional Development Fund, through COMPETE under the scope of the project POCI-01-0247FEDER-017603. Paula Marques acknowledge the FCT/MCTES for the Program Investigator (IF/00917/2013/CP1162/CT0016), UID/EMS/00481/2013-FCT and CENTRO-01-0145-FEDER-022083.