| Texto completo | |
| Autor(es): |
Filizzola, Amanda B.
;
Pereira, Joao L. N.
;
dos Santos, Pollyanna R.
;
Medeiros, Felipe da S.
;
do Amparo, Sthefany Z. S.
;
de Vasconcelos, Claudia K. B.
;
Silva, Glaura G.
Número total de Autores: 7
|
| Tipo de documento: | Artigo Científico |
| Fonte: | Journal of Coatings Technology and Research; v. N/A, p. 14-pg., 2023-09-01. |
| Resumo | |
Graphene oxide (GO) addition to epoxy can improve various properties provided that the GO features, dispersion and interaction with epoxy are optimized. Herein, the challenge of improving the hydrophobicity, flexural behavior and wear resistance of an epoxy coating on steel substrate was addressed by GO incorporation. Three GO concentrations were tested in the epoxy system (0.1, 0.25, and 0.50% m/m), and nanocomposites were prepared via roller mill. An increase in the thermal stability of the pure epoxy by 23 & DEG;C was observed for the nanocomposites as a function of GO incorporation. XPS analyses were carried out to study the interaction between DGEBA and GO, and the results show that a covalent link was formed between GO and epoxy. The wettability test showed an increase of 26 & DEG; in the contact angle while the behavior of the system from mechanical bending tests showed gains of 52% in the energy to fracture for the sample containing 0.5 wt.% GO with respect to the neat epoxy. The wear of the coatings showed a 31% decrease in the wear coefficient of the nanocomposite compared to the reference. The set of results reported in the present work pointed to the epoxy/GO coating as promising in terms of hydrophobicity and wear properties. (AU) | |
| Processo FAPESP: | 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais |
| Beneficiário: | Elson Longo da Silva |
| Modalidade de apoio: | Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs |