article · Scientific Reports
Acrylic-epoxy nanocomposite coatings loaded with graphene oxide nanoparticles at concentrations between 0.5 and 3 weight percent were prepared using a solution intercalation method. Incorporating the graphene oxide nanoparticles enhanced the thermal stability of the polymer coatings. Ultraviolet-visible spectroscopy demonstrated that even a 0.5 weight percent loading completely blocked incoming light, achieving zero transmittance. In addition, combining graphene oxide and polydimethylsiloxane improved the surface hydrophobicity of the polymer matrix, reaching a maximum water contact angle of 87.55 degrees. Adhesion tests confirmed high surface adhesion, with the coatings achieving 4B and 5B ratings. Electron microscopy revealed that surface functional groups supported chemical functionalisation, leading to uniform distribution and excellent nanoparticle dispersion at loadings up to 2 weight percent. Overall, graphene oxide derivatives show strong potential as nanofillers for corrosion protection coatings.
Corrosion and environmental exposure degrade industrial structures and protective surfaces over time. Enhancing polymer coatings with graphene oxide nanoparticles increases their thermal stability, water repellence, and adhesion while blocking light penetration. These improved physical properties make such nanocomposites promising candidates for developing more durable protective layers against surface degradation and corrosion in demanding environments.
This technology could be applied by protective coating manufacturers and industrial material suppliers looking to enhance corrosion protection. The abstract describes laboratory-scale preparation and property characterisation, demonstrating successful dispersion, light blocking, and adhesion. Because testing is limited to material-level metrics, the work appears to be at an early, laboratory-based stage of development before real-world coating formulations and commercial deployment can take place.
AI-generated from the published abstract. Always read the original work before citing.
In this study, acrylic-epoxy-based nanocomposite coatings loaded with different concentrations (0.5-3 wt.%) of graphene oxide (GO) nanoparticles were successfully prepared via the solution intercalation approach. The thermogravimetric analysis (TGA) revealed that the inclusion of GO nanoparticles into the polymer matrix increased the thermal stability of the coatings. The degree of transparency evaluated by the ultraviolet-visible (UV-Vis) spectroscopy showed that the lowest loading rate of GO (0.5 wt.%) had completely blocked the incoming irradiation, thus resulting in zero percent transmittance. Furthermore, the water contact angle (WCA) measurements revealed that the incorporation of GO nanoparticles and PDMS into the polymer matrix had remarkably enhanced the surface hydrophobicity, exhibiting the highest WCA of 87.55º. In addition, the cross-hatch test (CHT) showed that all the hybrid coatings exhibited excellent surface adhesion behaviour, receiving 4B and 5B ratings respectively. Moreover, the field emission scanning electron microscopy (FESEM) micrographs confirmed that the presence of the functional groups on the GO surface facilitated the chemical functionalization process, which led to excellent dispersibility. The GO composition up to 2 wt.% showed excellent dispersion and uniform distribution of the GO nanoparticles within the polymer matrix. Therefore, the unique features of graphene and its derivatives have emerged as a new class of nanofillers/inhibitors for corrosion protection applications.
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DOI: 10.1038/s41598-023-35154-z
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