Abstract
Reduced graphene oxide–epoxy grafted poly(styrene-co-acrylate) composites (GESA) were prepared by anchoring different amount of epoxy modified poly(styrene-co-acrylate) (EPSA) onto reduced graphene oxide (rGO) sheets through π–π electrostatic attraction. The GESA composites were characterized by Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS). The anti-corrosion properties of rGO/EPSA composites were evaluated by electro-chemical impedance spectroscopy (EIS) in hydroxyl-polyacrylate coating, and the results revealed that the corrosion rate was decreased from 3.509 × 10−1 to 1.394 × 10−6 mm/a.
Highlights
Graphene (G) and its family materials including graphene oxide (GO) and reduced graphene oxide have been used widely for metal corrosion protection [1,2,3,4], which is beneficial due to its excellent physical barrier, chemical and electrochemical properties
The chemical changes that occurred during treatment of reduced graphene oxide (rGO) with epoxy modified poly(styrene-co-acrylate) (EPSA) were observed by Fourier transform infrared spectroscopy (FTIR)
A deduction was established that the electron attraction was the anchoring force between arene rings and rGO, which ensured the stability of grafted poly(styrene-co-acrylate) composites (GESA) [30,31]
Summary
Graphene (G) and its family materials including graphene oxide (GO) and reduced graphene oxide (rGO) have been used widely for metal corrosion protection [1,2,3,4], which is beneficial due to its excellent physical barrier, chemical and electrochemical properties. Yu modified graphene by phenylenediamine and 4-vinylbenoic acid, and the pvGO(Polyvinyl alcohol-graphene oxide) composite can be dispersed in water, and the corrosion protection efficiency (2 wt.% of pvGO) in polystyrene coating is increased from 37.90% to 99.53% [22]. Up to now, the G, GO or rGO composites modified with polyacrylate derivatives for anticorrosion properties have rarely been reported, which have potentially wide industrial application. The results proved that the modified rGO sheets could be used as a barrier fillers in hydroxyl polyacrylate resin coating and the corrosion protection of GESA was more effective than that of unmodified rGO sheet. The corrosion protection of GESA composites coating were studied using electro-chemical impedance spectroscopy (EIS)
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