纳米TiO_2粉体分散工艺优化  

Optimization of Dispersion Process for TiO_2 Nano-powders

作　　者：胡海霞[1,2] 

机构地区：[1]浙江工业职业技术学院纺织工程学院,浙江绍兴312000 [2]浙江理工大学材料与纺织学院,浙江杭州310018

出　　处：《中国粉体技术》2014年第2期68-71,共4页China Powder Science and Technology

基　　金：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

摘　　要：为了充分利用纳米TiO2粉体的光催化特性,采用物理分散与化学分散相结合的方法,以蒸馏水为介质,对纳米TiO2粉体进行均匀分散;用体积沉降率评价法优选最佳分散剂,并通过正交实验得出纳米TiO2粉体的最佳分散工艺条件;采用透射电镜和激光衍射粒度仪对分散效果进行表征.结果表明,纳米TiO2粉体的最佳分散工艺条件如下：纳米TiO2粉体的质量分数为1％,以质量分数分别为0.5％、1％的聚丙烯酸铵、聚乙二醇为复合分散剂,分散液pH为7.0,高速剪切乳化机作用时间为30 min,转速为5 000 r/min,超声波作用时间为10 min;分散液中纳米TiO2粉体的粒径主要集中在30～50 nm,粒径分布均匀,分散效果稳定.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 dispcrsant 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 TiO： nano-powders is 1%, taking ammonium polyaerylate 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 rain. The particle size ofTiO2 nano-powders in the dispersed solution is mainly concentrated between 30 to 50 nm with uniform particle size distribution and steady distribution effect.

关 键 词：纳米TIO2粉体 分散工艺 分散剂 优化 

分 类 号：TB383[一般工业技术—材料科学与工程] TQ134.11[化学工程—无机化工]