单分散纳米二氧化硅微球的制备及羧基化改性  

Preparation and carboxyl modification of the monodi-sperse nano-silica microspheres

作　　者：赵存挺[1] 冯新星[1] 吴芳[1] 陈建勇[1] 

机构地区：[1]浙江理工大学材料与纺织学院先进纺织材料与制备技术教育部重点实验室,浙江杭州310018

出　　处：《功能材料》2009年第11期1942-1945,共4页Journal of Functional Materials

基　　金：教育部博士点基金资助项目(20060338001);浙江省自然科学基金资助项目(Y407295);长江学者和创新团队发展计划资助项目(IRT0654);国家重点基础研究发展计划(973计划)前期研究专项课题(2008CB617506)

摘　　要：采用改进工艺条件的Stber法制备纳米SiO2微球。用场发射扫描电镜(FESEM)分析了纳米二氧化硅的形貌、粒径。结果表明,通过温度梯度法和控制氨水浓度变化制备出高圆度、单分散、粒径可控的纳米级二氧化硅微球。用KH-550硅烷偶联剂和丁二酸酐对纳米二氧化硅表面羧基化改性。采用X射线能谱仪(EDS)、热重(TGA)、傅里叶红外(FTIR)等手段对改性后纳米二氧化硅的结构、元素种类及含量进行了表征。结果表明,纳米二氧化硅表面成功接枝了羧基官能团。In this thesis,the nano-silica microspheres were successfully prepared by an improved Stoeber method. The morphology and particle size of the nano-silica were investigated using field emission scanning electron microscope（FESEM）, which showed that the roundness, monodisperse and size could be controlled through the temperature gradient method and the changes in ammonia concentration. The prepared nano-silica microspheres were modified using KH-550 silane coupling agent and succinic anhydride. The structure, elements content of the modified nano-silica microspheres were characterized by X-ray energy dispersive spectrometer（EDS）, thermo- gravimetric analysis（TGA） fourier transform infrared spectroscopy（FTIR）. The results showed that the carboxyl groups had been successfully grafted to the nano-silica microspheres＇ surface.

关 键 词：温度梯度法 二氧化硅微球 羧基化 

分 类 号：TN304[电子电信—物理电子学]