Effect of polyethyleneimine on the properties of concentrated suspensions of titanium dioxide microbeads--颗粒学报PARTICUOLOGY

Xu, G., Xu, L., Pan, S., & Song, G. (2004). Effect of polyethyleneimine on the properties of concentrated suspensions of titanium dioxide microbeads. China Particuology, 2(4), 182-184. https://doi.org/10.1016/S1672-2515(07)60054-2

Effect of polyethyleneimine on the properties of concentrated suspensions of titanium dioxide microbeads

Guanli Xu ^*, Lina Xu, Shunlong Pan, Guangzhi Song

Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100101, China

10.1016/S1672-2515(07)60054-2

Volume 2, Issue 4, August 2004, Pages 182-184

Received 15 April 2004, Accepted 7 July 2004, Available online 27 November 2007.

E-mail: guanlixu@mail.ipc.ac.cn

Highlights

Abstract

The effect of polyethyleneimine (PEI) concentration on the properties of titanium dioxide (TiO₂) suspensions is studied with or without the addition of an electrolyte (barium acetate). Measurements of the apparent viscosity and the stability of TiO₂ suspensions showed that PEI is an effective dispersant for TiO₂ particles in suspension in the absence of an electrolyte, not only reducing the viscosity of the suspension but also increasing its stability. In the presence of an electrolyte, however, small quantities of polyethyleneimine could neither disperse the TiO₂ particles nor decrease the viscosity of the TiO₂ suspensions; only PEI concentrations beyond saturation adsorption could perceptively improve the stability of TiO₂ suspensions.

Graphical abstract

Keywords

polyethyleneimine; titanium dioxide; viscosity; stability

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