Fabrication and Characteristics of a Nano-TiO₂ Concentrated Dispersion

Abstract

A high-concentration dispersion with nanometer TiO₂ particles has been fabricated by a hyperdispersant. The particle distribution, composition, viscosity, thermal stability were investigated by transmission electron microscopy, and laser size analyzer, x-ray diffraction, rheometer, differential thermal analysis, and thermogravimetry, respectively. The mean particle size of the nano-TiO₂ concentrated dispersion was 72 nm with an especially narrow distribution, and near to monodispersion. The viscosity of 55 wt% nano-TiO₂ dispersion is 30 mPa·s at 344 s⁻¹. The dried dispersion composition made from the nano-TiO₂ and the hyperdispersant has good thermal stability.

Keywords:

• Dispersion
• hyperdispersant
• nano
• stability
• titanium oxide

Acknowledgments

The authors thank the National Natural Science Fund of China (Grant No. 50499334) and the National Key Technology R&D Program (Grant No. 2007BAB27B02-02 and 2009BAE70B02) for supporting these studies.