Abstract: To make full use of the photocatalytic property of TiO₂ nano-powders, the methods of physical and chemical dispersion were combined to make TiO₂ nano-powders steady dispersed using the distilled water as medium. The best dispersant was selected by the method of volume sedimentation rate evaluation. The best dispersion process conditions of TiO₂ nano-powders were concluded by the orthogonal experiments. The dispersion effect of TiO₂ nano-powders was characterized by TEM and laser diffraction particle size analyzer. The results show that the best dispersion process conditions of TiO₂ nano-powders are that the mass ratio of TiO₂ nano -powders is 1%, taking ammonium polyacrylate and polyethyleneglycol as the compound dispersant with mass ratios of 0.5% and 1%， pH value of the dispersed solution is 7.0, the high shear action time is 30 min, the revolution is 5 000 r/min and the ultrasonic action time is 10 min. The particle size of TiO₂ nano-powders in the dispersed solution is mainly concentrated between 30 to 50 nm with uniform particle size distribution and steady distribution effect.

Keywords: TiO₂ nano-powder; dispersion process; dispersant; optimization

中图分类号：TB383，TQ134.1+ 1        文献标志码：A

文章编号：1008-5548（2014）02-0068-04

DOI:10.13732/j.issn.1008-5548.2014.02.016

收稿日期：2013-08-30， 修回日期：2013-09-25，在线出版时间：2014-05-04。

基金项目：浙江省绍兴市科技局计划项目（公益性技术应用研究计划项目），编号：2012B70014。

第一作者简介：胡海霞（1982—），女，讲师，博士研究生，研究方向为纳米光催化材料及其在纺织中的应用。 E-mail: 15167019298@163.com。