软模板法制备球形TiO_2中空纳米电泳粒子  

Preparation of Spheric TiO_2 Hollow Electrophoretic Nanoparticles by Soft Template Method

作　　者：谈廷风[1] 王世荣[2] 齐鹏[2] 赵尚刚[2] 黄育东[1] 李祥高[2] 

机构地区：[1]天津城市建设学院材料科学与工程系,天津300384 [2]天津大学化工学院,天津300072

出　　处：《天津城市建设学院学报》2012年第2期125-128,共4页Journal of Tianjin Institute of Urban Construction

基　　金：国家自然科学基金(21102098);天津市高等学校科技发展基金(20090501)

摘　　要：电泳粒子的稳定性对电泳显示器件的显示效果至关重要.由于二氧化钛粒子密度较大,极易团聚,所以很难悬浮于有机溶剂中.模板法可以有效控制所合成纳米材料的形貌、结构和大小.以聚合物为模板,通过湿化学法模板上沉积,在空气氛围中高温煅烧以去掉内核来制备球形TiO2中空纳米粒子.用红外光谱、热重分析、X射线衍射和透射电镜进行了表征,并通过微电泳仪测TiO2粒子的Zeta电位.结果表明:球形颗粒比表面积大、流动性好,能减小粒子运动的阻力,而且中空结构能明显降低密度.The stability of electrophoretic particles is very important for the display effect of electrophoretic display devices. TiO2 particles are very difficult to suspend in organic solvents due to high density and agglomeration factor. Template method can effectively control the morphology, structure and size of the synthesized nanometer materials. The spheric TiO2 hollow nanoparticles are prepared by depositing on polymer templates using wet-chemistry method, and by removing the kernels through high-temperature calcination. The products were characterized by FT-IR, TGA, XRD, and TEM. The Zeta potentials were determined by JS94J micro-electrophoresis apparatus. The results showed that： spherical particles had high specific surface area and good fluidity, which could decrease the resistance of particle migration; and hollow structure can signifi- cantly reduce the density.

关 键 词：软模板法 球形TiO2中空纳米粒子 电泳 

分 类 号：TQ134.11[化学工程—无机化工]