Effect of graphene oxide loading on the performance of melanized corn oil based polymeric nanocomposite coatings

In this work, melanized corn oil (CO)-based polymer was synthesized and was further engineered using three different ratios of graphene oxide (GO). The polymer nanocomposite thus formed was evaluated using various standard techniques to check the efficacy of GO nanosheets on the overall coating performance. Fourier transform infrared and x-ray photoelectron spectroscopy techniques helped in structural elucidation of the prepared resins. The thermal stability of melanized CO based dihydroxy compound (CmDHC) was found to enhance up to 315 degrees C on the incorporation of 0.5 wt% GO nanosheets. Furthermore, the scanning electron microscopy results revealed that incorporation of GO improved the surface roughness of CmDHC@GO2 nanocomposite coatings. This amplified surface roughness resulted in increased hydrophobicity with contact angle value of 78 degrees as well as excellent corrosion resistance of 29.5 x 10(6) Omega cm(2). The overall results suggest that dispersion of GO nanosheets into the polymer matrix helped to improve the mechanical, thermal as well as corrosion resistance performance of these coatings and 0.5 wt% was the optimum amount required for the same. Highlights center dot GO nanosheets were dispersed in melanized CO-based polymer matrix. center dot Incorporation of GO nanoparticles in CmDHC polymer matrix enhanced the coating resistance almost 30 times. center dot GO inhibited the corrosive ions effectively that resulted in excellent corrosion resistive performance. center dot 0.5 wt% GO was the optimum amount to produce torturous path for corrosive ions. center dot Overall CmDHC@GO2 nanocomposite exhibited excellent coating performance.

Automated summary

In this study, a melanized corn oil-based polymer nanocomposite was synthesized by incorporating graphene oxide (GO) in different ratios. The results showed that the addition of 0.5 wt% GO significantly enhanced the thermal stability and corrosion resistance of the coating. The dispersion of GO nanosheets into the polymer matrix improved the mechanical and thermal properties of the coatings.