纳米氧化钛-乙二醇溶胶溶液的研究  

Study on Nano-TiO_2 Sol in Ethylene Glycol

作　　者：陈海珍[1] 

机构地区：[1]宁波服装职业技术学院工程分院,浙江宁波315100

出　　处：《宁波大学学报（理工版）》2004年第4期444-448,共5页Journal of Ningbo University：Natural Science and Engineering Edition

摘　　要：选用了钛酸丁酯、硬脂酸和乙二醇作为表面活性剂 ,采用表面化学修饰和表面物理修饰 2种方法修饰纳米氧化钛 ,然后分散在乙二醇溶剂中形成溶胶溶液 .并通过红外光谱仪、紫外分光计、原子力显微镜 ,分析了表面化学修饰后的纳米氧化钛表面化学结构的变化 ,观测了纳米氧化钛溶胶在乙二醇溶剂中稳定性 .试验结果表明表面活性剂与纳米氧化钛的表面的不饱和键之间形成了新的化学结构 ,粒子表面可能接枝上有机长链 ,提高了纳米粒子在溶剂中的相容性 .表面化学修饰后的纳米氧化钛与乙二醇溶剂形成了较稳定的溶胶体系 ,而且纳米溶胶粒径较小 .表面活性剂添加量与纳米粒子添加量控制在 (1～ 1.2 )∶1时 ,可以获得纳米溶胶粒径较小 ,同时溶胶稳定性较好的纳米氧化钛Two methods to modify nanoparticles TiO 2 in ethylene glycol are studied which are surface chemical modification and surface physical coating. Titanium tetrabutoxid, stearic acrid and ethylene glycol are chosen as surfactants. Through IR, surface chemical structures of nanoparticles TiO 2 were studied after surface chemical modification. Through UV spectrophotometry and AFM, nanoparticles TiO 2 in ethylene glycol after surface modification were observed. The experimental results show that nanoparticles after surface chemical modification and surfactants are conjoint with new chemical structures and that this sol system of nanoparticles after surface chemical modification and ethylene glycol is stable. And the stable nanoTiO 2 ethylene glycol sol can be conformed and the size of nanoTiO 2 sol is in nanometer, when surfactant : nanoparticles TiO 2 is (1～1.2)∶1.

关 键 词：纳米氧化钛溶胶 乙二醇 钛酸丁酯 硬脂酸 表面化学修饰 稳定性 

分 类 号：TB383[一般工业技术—材料科学与工程]