纳米TiO_2涂层对Al_2O_3微滤膜的改性研究  

Modification of Al_2O_3 Microfiltration Membrane by Nano-crystalline TiO_2 Coating

作　　者：周健儿[1] 吴建青[1] 汪永清[2] 梁健[2] 张小珍[2] 操瑞北[2] 

机构地区：[1]华南理工大学,广州510641 [2]景德镇陶瓷学院,景德镇333001

出　　处：《无机材料学报》2006年第3期725-730,共6页Journal of Inorganic Materials

基　　金：国家"973"预研项目(2004CCA07500)

摘　　要：以硫酸钛、尿素为主要原料,采用均相沉淀法对α-Al2O3微滤复合膜进行了纳米TiO2 的涂覆改性,着重考察了反应温度、反应物浓度与涂覆次数对改性作用的影响．实验结果表明,制备的TiO2改性涂层光滑致密,晶粒尺寸为10-15nm,使改性后的Al2O3微滤复合膜水通量提高了19％以上．用TEM、Zeta电位分析手段对改性涂层进行了测试分析,探讨了改性的机理．For the modification of α-Al2O3 microfiltration membrane, the nano-crystalline TiO2 coating was obtained by a homogeneous precipitation method using titanium sulfate and urea as raw materials. The effects of reaction temperature, reactant concentration and coating times on the modification of the membrane were investigated systematically. The micro-structure of nano- crystalline TiO2 coating and its modifying mechanism were also studied by means of TEM, Zeta electric potential analyzer etc. The results show that nano-crystalline TiO2 modifying coating composed of 10-15nm grains is smooth and dense, and the water flux of the modified membrane is increased by more than 19% over the membrane before modification.

关 键 词：均相沉淀法 微滤膜 氧化钛 改性涂层 

分 类 号：TB321[一般工业技术—材料科学与工程] TQ174[化学工程—陶瓷工业]