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Monday, 24 September 2018
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Raw materials & technologies, Technologies

Silver-embedded epoxy nanocomposites as organic coatings for steel

Friday, 14 September 2018

A novel hybrid nanomaterial based on silver nanoparticles, AgNPs, supported by 2,4-dihydrazino-6-(methoxypolyethyleneglycol)-1,3,5-triazine (mPEGTH) was prepared using solid phase technique. The synthesis process and the structural properties of the AgNPs were analysed through X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmittance and scanning electron microscopy (TEM and SEM).

The Ag/mPEGTH hybrid materials improve the corrosion protection properties of epoxy coatings. Source: psdesign1 – stock.adobe.com.

The Ag/mPEGTH hybrid materials improve the corrosion protection properties of epoxy coatings. Source: psdesign1 – stock.adobe.com.

Synergistic effect in corrosion protection and self-healing performance

The effect of seawater, and pH of solutions on the aggregation and zeta potential of Ag NPs were characterised and identified. The Ag/mPEGTH hybrid materials produced well dispersion and exhibit a remarkable superiority in enhancing the anticorrosion performance of epoxy coatings and fulfill a significant synergistic effect in anticorrosion and self-healing performance for epoxy composite coatings. The new self-healing mechanism of Ag/mPEGTH nanomaterial for the epoxy coating defects is tentatively proposed and discussed.

The study is published in: Progress in Organic Coatings Volume 123, October 2018, Pages 209-222.

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