纳米氧化钛有机溶胶的制备及其电流变性能  

The preparation and electrorheological property of nano titanate organosol

作　　者：赵艳[1] 王宝祥[1] 丁昌林[1] 向礼琴[1] 赵晓鹏[1] 

机构地区：[1]西北工业大学电流变技术研究所,陕西西安710072

出　　处：《功能材料》2006年第11期1844-1847,共4页Journal of Functional Materials

基　　金：国家杰出青年基金(50025207)国家自然科学基金(50272054)

摘　　要：通过液-液相转移法制备了纳米氧化钛有机溶胶。对制备的有机溶胶及水溶胶进行了UV-vis光谱、粒度分布等表征．并用数码照片直观的展现相转移效果。结果表明：表面活性剂的种类、浓度及HLB值对相转移影响显著；颗粒在水中及有机相中均具有较窄的粒度分布。研究了相转移机理及有机溶胶的电流变效应。该有机溶胶电流变液具有极低的漏电流密度、较宽的工作温区和较好的电流变效应：3kV/mm直流电场下,漏电流密度低于5μA／cm^2,200s^(-1)下电流变效率为15。介电性质测量结果说明这种有机溶胶具有较好的电流变效应。A novel liquid-liquid phase transfer method was employed to prepared nano titanate organosol. The hydrosol and organosol were investigated using UV-vis spectroscopy and laser particle size analyzer, and digital photos are used to exhibit the extracted effect. The results prove that the variety, concentration and HLB value of surfactant affect the phase transfer effect markedly. The as prepared organosol and hydrosol have a narrow size distribution. The phase transfer mechanism and the electrorheological effect of the organosol were studied. As the low current density, broad working temperature scale and good electrorheological effect, which under 3kV/mm dc electrical field, the current density is low than 5μA/cm^2 , elecrheological effect is 15 under 200s^-1. Dielectrie property was also employed to explain the good electrorheological properties.

关 键 词：纳米氧化钛 有机溶胶 电流变液 相转移 

分 类 号：TQ658.24[化学工程—精细化工]