球形二氧化锆用作液相色谱填料的制备与表征  

Preparation and Characterization of Porous Zirconia Microspheres as Chromatographic Packing Materials for HPLC

作　　者：张宇[1] 马亚鲁[1] 

机构地区：[1]天津大学理学院化学系,天津300072

出　　处：《硅酸盐通报》2007年第5期910-913,923,共5页Bulletin of the Chinese Ceramic Society

基　　金：天津市自然科学基金(043612211)

摘　　要：利用聚合诱导胶体凝聚技术(PICA)制备了球形二氧化锆。以氧氯化锆为起始原料,在酸性条件下通过脲醛聚合反应制备二氧化锆树脂凝胶球,经真空干燥、700℃煅烧制备的氧化锆微球尺寸均匀,球形度好,粒径在2.6～3.0μm之间;相组成以四方、单斜氧化锆相为主;孔径分布在2～17nm中孔范围内,比表面积为32m2/g;该填料对碱性化合物有良好的分离选择性。Porous, spherical zirconia particles with a narrow particle size distribution （about 3 μm） were synthesized by the process of polymerization-induced colloid aggregation （PICA）. In this process, an aqueous zireonia sol was mixed with urea and formaldehyde, which was polymerized by the acidic sol. Urea-formaldehyde polymer adsorbed onto the ZrO2 colloids, entraining the colloids in the precipitation of the polymer gel and thus allowing the colloids to aggregate. Porous zircon/a particles obtained after vacuum drying and sintering at 700℃ are 2.6-3.0μm in diameter with a surface area of 32m^2/g and pores ranging from 2nm to 17nm in diameter. Phase composition is mainly tetragonal and monoclinic. The strength of porous zirconia microspheres is strong enough to withstand the packing of a HPLC column. The materials are also suitable for separation of alkaline compounds.

关 键 词：聚合诱导胶体凝聚技术 二氧化锆 填料 碱性化合物的色谱分离 

分 类 号：TQ134.1[化学工程—无机化工]