中文摘要：

采用分步共缩聚法，在介孔氧化硅球壳层引入含有溴的有机基团，再与四乙烯五胺反应引入多胺，合成了孔1：7处pH敏感性的介孔氧化硅纳米球．通过X射线粉末衍射（XRD）、N2物理吸附、透射电镜（TEM）、红外（IR）和元素分析对该材料的结构和组成进行表征．以布洛芬为模型药物，研究了所合成材料对布洛芬的吸附性能和在不同pH条件下的释放行为．

英文摘要：

Polyamines functionalized mesoporous silica nanospheres were synthesized through a delayed con- densation followed by chemical modification. The structure and composition of the synthesized material were characterized by X-ray powder diffraction （XRD）, N2 physical adsorption, transmission electron mi- croscope （TEM）, infrared spectral analysis （IR） and elemental analysis. Furthermore, using ibuprofen （IBU） as a model drug,we investigated the adsorption capacity of the synthesized material and releasing behavior at different pH.