Enhanced Anti-Weathering of Nanocomposite Coatings with Silanized Graphene Nanomaterials

摘要

This article presents the development of a nanocomposite coating using nanographene platelets associated with an epoxy primer to improve the coating resistance against corrosion and weathering. Based on the hypothesis that coatings containing nanoadditives would provide strong resistantance to degradation and that modified graphene particles through silanization improve the stability of the graphene particles in the coatings, the performance of the nanocomposite coatings was assessed by exposing them to ultraviolet (UV) light and salt fog by placing specimens alternatively in two respective chambers for intervals of 24 hours for 20 days. Coating performance analyses were carried out using atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectrometer thickness measurements, water contact angle, and electro impedance spectroscopy (EIS) testing.