The development of eco‐friendly UV‐protective polyacrylate/rutile TiO₂ coating

Abstract

This work aims to prepare a coating with good UV protection properties while maintaining optimal transparency. In this work, the addition of 0-2 wt.% TiO 2 on the properties of polyacrylate (PA), the method of preparation, and the effect of UV exposure on coatings were investigated. Rutile TiO 2 /PA coatings were prepared by ex situ and in situ emulsion polymerization. The results showed that the addition of nanoparticles and the preparation method significantly affect the particle size distributions of PA, such that ex situ emulsions show the presence of agglomerates, while they are not visible in in situ emulsions. Viscosity also depends on the preparation method, so ex situ emulsions show no change with the addition of nanoparticles, while in situ emulsions show an increase in viscosity. In situ coatings also have better morphology and transparency compared to ex situ. The addition of nanoparticles increases the thermal stability of PA in the later stages of thermal degradation and causes a decrease in tensile strength with an increase in elongation at break of PA. In situ coatings also provide better UV protection properties compared to ex situ coating films.

Adjusting the charging behavior of TiO2 with basic surfactants in an apolar medium for electrophoretic displays

“…Owing to the high refractive index and reflectivity 1,2 , desirable stability 3 and ecofriendly characteristic 3 , titanium dioxide (TiO 2 ) particles are one of the most universally utilized inorganic particles in various fields, including humidity sensor devices 4 , printing inks 5,6 , coatings 7,8 and electrophoretic display (EPD) 9,10 . With respect to other inorganic white pigments, zinc oxide (ZnO) is sensitive to ambient light, humidity and chemicals and its refractive index is relatively low; Barium sulfate (BaSO 4 ) with relatively high density is difficult to be dispersed.…”