单分散纳米二氧化硅微球的制备及羧基化改性

功能材料, 2009, 40(11): 1942-1945.

单分散纳米二氧化硅微球的制备及羧基化改性

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

2.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

3.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

4.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

基金项目: 教育部高等学校博士学科点专项科研基金(20060338001) 浙江省自然科学基金(Y407295) 教育部长江学者和创新团队发展计划(IRT0654) 国家重点基础研究发展计划(973计划)前期研究专项项目(2008CB617506)

关键词：温度梯度法 , 二氧化硅微球 , 羧基化

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

ZHAO Cun-ting ^1, , FENG Xin-xing ^2, , WU Fang ^3, , CHEN Jian-yong ^4,

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

2.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

3.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

4.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

Keywords： temperature gradient method , SiO_2 microspheres , carboxylation

采用改进工艺条件的Stober法制备纳米SiO_2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 Stober 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) , thermogravimetric analysis(TGA) fourier transform infrared spectroscopy(FTIR). The results showed that the carboxyl groups had been successfully grafted to the nano-silica microspheres' surface.

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