Meng Zhen, Xue Chunyan, Zhang Qiuhong, Yu Xuehai, Xi Kai, Jia Xudong
Department of Polymer Science and Engineering, Nanjing University, Nanjing 210093, People's Republic of China.
Langmuir. 2009 Jul 21;25(14):7879-83. doi: 10.1021/la900458b.
Highly monodisperse hybrid spherical silica nanoparticles with diameters ranging from 30 to 200 nm were prepared by a one-step emulsion polymerization in aqueous solution. In contrast with the former method for preparing the hybrid silica materials, our method has three advantages. (1) Through this one-pot route, hybrid silica particles with organic functional groups on the surface are prepared in aqueous solution. (2) The particles are created in a size range of 30-200 nm and highly monodisperse. (3) The size of the particles can be effectively well-defined and precisely controlled depending upon the synthesis conditions such as the concentration of surfactant. Other kinds of organosilane monomers have also been tried in the same way. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), and dynamic light scattering (DLS) were performed to elucidate the morphologies of the hybrid silica particles. Thermogravimetric analysis (TGA), (29)Si NMR, and (13)C NMR were used to gain information about thermal properties and detail structure. This approach may open a new broad avenue for the hybrid material in the field of photocrystal, electronic enveloping.
通过在水溶液中进行一步乳液聚合制备了直径范围为30至200 nm的高度单分散的杂化球形二氧化硅纳米颗粒。与以前制备杂化二氧化硅材料的方法相比，我们的方法具有三个优点。（1）通过这种一锅法路线，在水溶液中制备了表面带有有机官能团的杂化二氧化硅颗粒。（2）所制备的颗粒尺寸范围为30-200 nm，且高度单分散。（3）根据诸如表面活性剂浓度等合成条件，可以有效地明确界定并精确控制颗粒的尺寸。还以同样的方式尝试了其他种类的有机硅烷单体。进行了扫描电子显微镜（SEM）、透射电子显微镜（TEM）和动态光散射（DLS）以阐明杂化二氧化硅颗粒的形态。使用热重分析（TGA）、（29）Si NMR和（13）C NMR来获取有关热性能和详细结构的信息。这种方法可能为光晶体、电子封装领域的杂化材料开辟一条新的广阔途径。
