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Feb 19, 2024

Epoxy resin reinforced with different fillers

A recent study examines the mechanical, thermal, and surface properties of fusion-bonded epoxy nanocomposite coatings. Epoxy coatings have generally been used in applications that require the surfaces

A recent study examines the mechanical, thermal, and surface properties of fusion-bonded epoxy nanocomposite coatings.

Epoxy coatings have generally been used in applications that require the surfaces to be protected against corrosion. However, their use in demanding applications wherein the contacting surfaces are required to be protected against wear and tear has been limited due to their inferior mechanical and thermal properties. To overcome this challenge, epoxy composite coatings came into being, wherein the epoxy resin is reinforced with different fillers. However, due to the availability of a large variety of fillers, the selection of a suitable filler and the amount to be used in the epoxy resin for the best properties still remains a challenge.

Hence, the focus of a new research work is to compare the performance of five different fillers, viz. carbon nanotubes (CNTs), graphene (GO), alumina (Al2O3), titanium dioxide (TiO2), and ceria (CeO2) in enhancing the mechanical, thermal, and surface properties of epoxy coatings. The five fillers selected covered the spectrum of carbon based, ceramic, and metallic oxide fillers. Different loadings (0.5, 1.5, and 3 wt%) of each of the fillers were used to fabricate fusion-bonded epoxy composite coatings on mild steel coupons using an electrostatic spray gun. The effect of these fillers was evaluated on the hardness, thermal conductivity, and water contact angle of the epoxy composite coatings. It was observed from the results that 0.5 wt% of Al2O3 was found to be the best-performing filler among all the fillers in terms of higher hardness and 3 wt% of Al2O3 was best in terms of thermal conductivity as compared to the pristine epoxy coatings and other epoxy composite coatings.

The study has been published in Journal of Coatings Technology and Research, Volume 20, Issue 4, July 2023.