纳米TiO_2分散及稳定性研究  

The study on the dispersion and stabilities of nano-titanium dioxide

作　　者：呼日勒朝克图 杨尚元[2] 常菲[1] 孙宝云[2] 

机构地区：[1]内蒙古大学化学化工学院,呼和浩特010022 [2]中国科学院高能物理研究所纳米生物效应与安全性中科院重点实验室,北京100049

出　　处：《功能材料》2016年第3期258-262,共5页Journal of Functional Materials

基　　金：国家自然科学基金重大研究计划资助项目(2006CB932505);国家自然科学基金青年基金资助项目(Y5118Y005C)

摘　　要：以羧甲基纤维素钠(CMC-Na)作为分散剂,研究金红石型纳米TiO_2口服染毒前在水相中的分散性能及稳定性,利用紫外-可见光谱及动态光散射等方法对分散前后的纳米TiO_2溶液稳定性进行研究,结果表明,纳米TiO_2在水相中的分散能力与稳定性与分散剂及纳米TiO_2的用量有一定关系,分散剂CMCNa与TiO_2存在一个最适浓度范围,在CMC-Na的浓度<1.5%以及TiO_2浓度<2.01 mg/mL时具有较好的分散性和稳定性。This paper presented the investigation of the dispersion and stability of rutile TiO2 nano-powder in pure aqueous media where sodium carboxyl-methyl cellulose(CMC-Na)was used as dispersant before oral administration to mice.The results of UV-Vis absorption spectra for both upper layers and lower layers,and dynamic light scattering study showed that the dispersion and stability of TiO2 suspension have relationship with the amount of TiO2 powder and the concentration of surfactant in aqueous solution.Better dispersion and stability were got when the concentration of CMC-Na was less than 1.5% and the amount of TiO2 was less than2.012mg/mL.

关 键 词：纳米TIO2 羧甲基纤维素钠 分散性 稳定性 

分 类 号：TQ027.3[化学工程]