Polyester coatings with enhanced friction characteristic and scratch resistance

A new work focuses studies the effect of filler content on the scratch behavior and the tribological performance of a polyester/graphene oxide nanocomposite coating.

Cracks in a coating.
Environmental stress cracking causes embrittlement in polymers due to a combination of plasticisation and swelling caused by moisture. Image source: geralt - Pixabay (symbol image).

The influence of 0.5, 0.75, and 1 wt.% of graphene oxide (GrO) in nanocomposite coating on scratch behavior and tribological performance was analysed. The effects of the graphene oxide content on the friction and wear behavior of polyester composite coatings were evaluated under dry sliding conditions.

Antiwear ability

Experimental findings showed that the addition of 0.5 wt.% GrO was effective in reducing the friction coefficient of polyester coating. Meanwhile, under the same sliding conditions, the wear results revealed that the polyester coating filled with 1 wt.% GrO has better antiwear ability compared to those filled with 0.5 and 0.75 wt.% GrO. From the scratch analyses, the researchers deduced that coating scratch behavior was highly affected by the amount of fillers inside the polyester matrix. In fact, the best friction characteristic and scratch resistance were observed in the case of polyester coatings filled with the lower amount of GrO, namely 0.5 wt.%.

The study has been published in Journal of Coatings Technology and Research, Volume 18, Issue 5, September 2021.

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