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Tuesday, 11 August 2020
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Raw materials & technologies, Raw materials, Coatings pigments

TiO2 nanocomposites enhance transparency

Tuesday, 22 November 2011

TiO2 nanocomposites with high refractive index exhibit a transparency around 90 % throughout the visible light range.

TiO2 nanocomposites with high refractive index and transparency were developed. Quelle: luminouslens/Fotolia

TiO2 nanocomposites with high refractive index and transparency were developed. Quelle: luminouslens/Fotolia

Transparent polymer nanocomposites with high refractive index were prepared by grafting polymer chains into TiO2 nanoparticles via a combination of phosphate ligand engineering and alkyne-azide "click" chemistry. The synthesised phosphate-azide ligand anchors strongly onto the TiO2 nanoparticle surface. The refractive index of the composite material increased linearly from 1.5 up to 1.8 by increasing the loading of TiO2 particles to 30 vol % (60 wt %). Test results show that the nanocomposites exhibited a transparency around 90 % throughout the visible light range. It was also found that the PGMA-grafted TiO2 nanoparticles can be well dispersed into a commercial epoxy resin, forming transparent high refractive index TiO2-epxoy nanocomposites. The article appeared in "Journal of Material Chemistry", issue 46, 2011, pp. 18623-18629.

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