强激光与粒子束2012，Vol.24Issue(6)：1401-1405,5.DOI:10.3788/HPLPB20122406.1401
微流控制备单分散微米级SiO2微球
Synthesis of monodispersed micron-level silica spheres in microfluidics
摘要
Abstract
Polydimethylsiloxane microfluidic devices were fabricated by lithography. The effects of tetraethyl orthosilicate and ammonia amounts on gelation time were studied. The optimum formulation for preparing silica microspheres is the volume ratio of dimethylactamide, tetraethyl orthosilicate and ammonia is 8 : 4 : 1, and the reaction temperature is 60 ℃. In the microfluidic channels, the sphere size increases with increasing the volumetric flow rate of dispersed phase and decreasing the volumetric rate of continuous phase. Monodispersed silica microspheres with sizes ranging from 40 to 220 μm were prepared in the microfluidic devices by controlling the volumetric flow rates of dispersed phase and continuous phase. Optical microscopy and sphere size analysis show that the prepared silica microspheres have high sphericity and good monodispersity.关键词
SiO2微球/微流控技术/单分散性/聚二甲基硅氧烷/正硅酸乙酯Key words
silica spheres/microfluidic technology/ monodispersity/polydimethylsiloxane/tetraethyl orthosilicate分类
化学化工引用本文复制引用
高存梅,罗炫,方瑜,张庆军,杜凯,唐永建..微流控制备单分散微米级SiO2微球[J].强激光与粒子束,2012,24(6):1401-1405,5.基金项目
中国工程物理研究院激光聚变中心所创新项目(9071-6) （9071-6）
中国工程物理研究院科学技术发展基金项目(2010B0302047) （2010B0302047）
