Preparation of Hollow Silica Microspheres via Poly（N-isopropylacrylamide）  

聚（N-异丙基丙烯酰胺）模板法制备二氧化硅中空微球

作　　者：汪谟贞[1] 陈宇晨[1] 葛学平[2] 葛学武[1] 

机构地区：[1]中国科学院软物质化学重点实验室,中国科学技术大学高分子材料科学与工程系,合肥230026 [2]华东理工大学理学院核技术与应用研究所,上海200237

出　　处：《Chinese Journal of Chemical Physics》2012年第1期120-124,I0004,共6页化学物理学报（英文）

摘　　要：Core-shell structured SiO2/poly（N-isopropylacrylamide） （SiO2/PNIPAM） microspheres were successfully fabricated through hydrolysis and condensation reaction of tertraethyl orthosilicate （TEOS） on the surface of PNIPAM template at 50 ~C. The PNIPAM template can be easily removed by water at room temperature so that SiO2 hollow microspheres were finally obtained. The transmission electron microscope and scanning electron microscope observations indicated that SiO2 hollow microspheres with an average diameter of 150 nm can be formed only if there are enough concentration of PNIPAM and TEOS, and the hy- drolysis time of TEOS. FTIR analysis showed that part of PNIPAM remained on the wall of SiO2 because of the strong interaction between PNIPAM and silica. This work provides a clean and efficient way to prepare hollow microspheres.

关 键 词：SiO2 hollow microsphere Poly（N-isopropylacrylamide） Tertraethyl orthosilicate Soft template 

分 类 号：O[理学]