Enhanced weathering performance of epoxy/ZnO nanocomposite coatings

A new report aims at improving the weathering performance of an epoxy coating via surface treatment of zinc oxide (ZnO) nanoparticles with different silane coupling agents.

The main target of treatment was to suppress the photocatalytic activity of ZnO nanoparticles during weathering exposure. Amino- and glycidoxy-functional silane coupling agents (at three concentration levels) were used for this purpose. The positive influence of such treatment on the weathering performance was proved using different (aesthetic, mechanical, chemical, and topological) techniques. It was also revealed that modification with the stoichiometric or higher (1.5 stoichiometric) level of silane coupling agents was more effective in such improvement.

The study was published in Progress in Organic Coatings, Volume 147, October 2020.

Graphene and graphene oxide as a new class of corrosion inhibitors

A recent publication presented an overview of the synthesis and application of graphene (G) for corrosion protection, and chemically modified graphene oxide (GO) emerged as new class of corrosion inhibitors, due to their excellent hydrophobicity, chemical resistance, stability, high mechanical strength.

The article covers the synthesis of modified GO and their salient features as corrosion-resistant coatings and inhibitors, and explores the various covalent/ non-covalent approaches for the modification of graphene and GO. An outline of the different types of single and multi-layer graphene-based anticorrosion coatings is also discussed, as is an overview of the literature on the chemically modified GO-based aqueous corrosion inhibitors focused on the different mechanisms underlying the corrosion protection behaviour. Finally, the research prospects on some newly emerging 2D material-based corrosion protecting agents is also explored.

This overview was published in Progress in Organic Coatings, Volume 147, October 2020.

Aluminum triphosphate-containing intumescence flame-retarding coatings

The effect of aluminium triphosphate (ATP) on the flame resistance of intumescent flame retardant coatings (IFRCs) has been explored, with an aliphatic waterborne polyurethane (AWP) as the binder.

The quantitative analysis on the pyrolysis kinetics of an ATP-containing AWP-based coating was also investigated, and it was determined that a dosage of 2 wt% of ATP in the AWP-based coating produced an enhanced flame resistance, evidenced by the fire growth index decreasing from 0.49 to 0.34 kW/m2/s.

The study was published in Progress in Organic Coatings, Volume 147, October 2020.