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Monday, 16 September 2019
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Raw materials & technologies, Applications

Improving the scratch resistance of commodity polymers

Thursday, 12 January 2017

Hybrid transparent coatings based on zirconia nanoparticle fillers and epoxy resin were designed to increase scratch resistance of commodity polymers without impairing their optical properties.

Characterisation of scratch-resistant hybrid coatings based on non-hydrolytic sol-gel ZrO<custom name='sub'>2</custom> nanoparticles. Source: BrandtMarke/pixelio.de
Characterisation of scratch-resistant hybrid coatings based on non-hydrolytic sol-gel ZrO2 nanoparticles. Source: Brand...

Suspensions of nano-crystalline ZrO2 in benzyl alcohol were synthesised via a versatile non-hydrolytic sol-gel process using ZrCl4 as precursor.

Novel non-aqueous synthesis of zirconium oxide

The obtained ZrO2 nanoparticles showed a crystalline structure attributable to a tetragonal phase and an average particle size of 2 nm. ZrO2 nanoparticles, suspended in tert-butanol, were mixed with a commercial epoxy resin (5 and 10%wt.). The organic solvent was then evaporated and hybrid composites were deposited on polycarbonate and poly(methyl methacrylate). The obtained coatings showed a homogeneous adhesion and a negligible effect on the transparency of these polymers. An increased scratch-resistance was obtained by increasing the ZrO2 nanoparticles content.

The study is published in: Progress in Organic Coatings, Volume 103, February 2017, Pages 60–68

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