采用沉淀聚合法制备了粒径大小分布均一的大粒径聚甲基倍半硅氧烷微球,研究了油水比、反应温度和催化剂pH等因素对微球粒径大小及粒径分布的影响,利用扫描电镜(SEM)对微球外观形态进行了表征,采用傅里叶变换红外光谱仪(FT-IR)和X射线衍射(XRD)对微球结构进行表征。结果表明:当油水比为1∶7,催化剂溶液pH为11,反应温度为35℃时,可制备得到平均粒径为10.8μm的窄分布聚甲基倍半硅氧烷微球。

The large uniform sizes polymethylsiloxane microspheres were prepared by the precipitate polymerization method.Effects of the reaction parametes,such as the ratio of oil to water,the reaction temperature,and the pH value of initiator aqueous on microsphere size and distribution were investigated.Polymethylsiloxane microspheres were characterized by fourier transform infrared spectrometer(FT-IR),X-ray diffraction(XRD) and scanning electron microscope(SEM).Narrow size distribution polymethylsiloxane microspheres in the size range of 10.8μm were prepared when the oil-water ratio was 1∶7,the pH value of initiator aqueous was 11,reaction temperature was 35℃.