Abstract
In this paper, hyperbranched polyether functionalized graphene oxide (EHBPE-GO) was prepared by a facile one-step method. Fourier transform infrared spectroscopy (FTIR), X-ray diffractometry (XRD), thermogravimetric analyzer (TGA), and trans-mission electron microscopy (TEM) results confirmed the formation of EHBPE-GO. Then, EHBPE-GO was cured with phenolic amides at room temperature to prepare epoxy coatings. The corrosion resistance of epoxy coatings was investigated systematically by using electrochemical and traditional immersion methods. Results show that a small amount of EHBPE-GO (8 wt % of Diglycidyl ether of bisphenol A (DGEBA)) in epoxy coating achieves 50% higher improvement in acid-resistance than unmodified neat DGEBA resin. For the nanocomposite epoxy coating, the superior acid-resistance is attributed to the increased crosslink density and the impermeable 2D structure of EHBPE-GO. This work provides a facile strategy to develop the effective improved corrosion resistance nanofiller for epoxy coating.
Highlights
Epoxy coating is widely used in various applications due to its excellent adhesion properties, low-shrinkage, good corrosion resistance, and chemical resistance [1,2]
Peaks at 2960–2880 cm−1 belong to the aliphatic –C–H stretching vibration, peaks at about 1231 and 1100 cm−1 can be assigned to Ph–O–C and C–O–C stretching vibration, respectively, and the characteristic absorption of epoxy groups can be observed at about 908 and 843 cm−1, indicating the successful functionalization of Graphene oxide (GO)
This loading increases, hybrid coating impedances first increase decrease; can be explained by the formation of the corrosion product films which can act as a protective layer and the best overall performance is achieved at 8% loading
Summary
Epoxy coating is widely used in various applications due to its excellent adhesion properties, low-shrinkage, good corrosion resistance, and chemical resistance [1,2]. Thermoplastics [3], siloxane modifiers [4], liquid rubber [5], and hyperbranched polymers have been used to modify the epoxy coating either by chemical or physical methods. Zhang [12] reported a functionalized graphene oxide with a hyperbranched cyclotriphosphazene polymer and found that the addition of modified. Application of hyperbranched polymer functionalization of graphene oxide in a surface coating has seldom been reported in the literature [11], which may be a promising way to improve the anticorrosion performance of epoxy resin.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
