Incorporation of Graphene Oxide Nanoparticles Modified with Benzimidazole into an Epoxy Polyamide Coating to Enhance the Physical-Mechanical Properties

Document Type : Original Article

Authors

1 School of Metallurgy and Materials Engineering, College of Engineering, University of Tehran

2 Department of Surface Coatings & Corrosion, Institute for Color Science and Technology

Abstract

In this paper, the graphene oxide nanosheets modified by benzimidazole were used as the epoxy coating reinforcing nanoparticles. In this way, after synthesizing of graphene oxide and physically adsorption of benzimidazole molecules on them, the modified graphene oxide nanosheets and the unmodified graphene oxide were dispersed in the epoxy matrix. The physical-mechanical properties of the coatings obtained were evaluated by DMTA and tensile tests. In addition, by a scanning electron microscope (SEM) the coating fractured surface morphology and the degree of nanoparticle dispersion in the coatings were studied. The results showed that the benzimidazole molecules could successfully modify the graphene oxide nanosheets surface via noncovalent bonds. Furthermore, the ultimate tensile strength, Young's modulus, strain at break, and energy at break were increased 81%, 15%, 310%, and 207%, respectively, compared to the neat epoxy coating. This improvement in physical-mechanical properties of the coating may be attributed to the better dispersion of the nanosheets in the coating as well as the stronger interactions between the nanosheets and the epoxy resin.

Keywords

Main Subjects

References

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Journal of Color Science and Technology
Volume 13, Issue 4
March 2020
Pages 341-352

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