The innovation lies in the covalent grafting of nano titanium dioxide (TiO₂) onto graphene oxide (GO) via thiol–ene click chemistry, resulting in a nanohybrid material with significantly improved performance characteristics. The modified GO-TiO₂ particles are embedded within a methyl phenyl silicone resin matrix. The result is a composite coating that exhibits improved thermal stability, corrosion protection and self-cleaning abilities—key properties for industrial applications in harsh conditions such as chemical processing or power generation.

Nano-hybrid coating structure improves thermal and mechanical integrity

Characterisation by SEM, TEM, FTIR and XRD confirmed the successful grafting of TiO₂ onto GO. This covalent bonding not only ensures better dispersion of the nanomaterials within the resin but also enhances interfacial compatibility. The result is superior structural integrity and reduced phase separation—an issue that typically limits long-term coating performance.

The hybrid GO-TiO₂ network strengthens the silicone matrix and facilitates improved stress distribution under thermal load. This leads to a marked increase in thermal endurance and mechanical robustness, even when exposed to high temperatures or corrosive chemical vapours.

Enhanced barrier and self-cleaning effect from only 0.2 wt% additive

Electrochemical analyses revealed that the modified coating significantly restricts ion permeation and expands corrosion pathways, effectively slowing down substrate degradation. Even at a low filler content of just 0.2 wt%, the GO-TiO₂ additive delivered a noticeable boost in barrier properties. Additionally, the surface exhibits self-cleaning effects due to the photocatalytic behaviour of TiO₂—an added benefit for exposed metal structures.

This study highlights the potential of thiol–ene click chemistry in designing robust, multifunctional nanocomposite coatings. The approach opens up new avenues for silicone-based protective systems in demanding applications, from aerospace and marine engineering to high-temperature pipelines.