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用光引发剂2-羟基-4’-(2-羟乙氧基)-2-甲基苯丙酮(IHT-PI 659)对纳米SiO2表面进行接枝使之兼具两亲性及光引发特性;以该功能性纳米SiO2为稳定剂构筑O/W(水包油)型Pickering乳液;用紫外光引发处于内油相的甲基丙烯酸甲酯单体聚合,制备出具有中空结构的SiO2/PMMA复合微球,采用傅里叶变换红外光谱(FTIR)、热失重分析仪(TGA)、透射电镜(TEM)及扫描电子显微镜(SEM)对复合微球进行了表征,并提出了紫外光引发Pickering乳液聚合制备中空复合微球的机理.
The photoinitiator 2-hydroxy-4 ’- (2-hydroxyethoxy) -2-methylpropiophenone (IHT-PI 659) grafted on the surface of nano-SiO2 to have both amphiphilic and photo- ; O / W (oil-in-water) Pickering emulsion was constructed by using the functional nano-SiO2 as a stabilizer; and the methyl methacrylate monomer in the inner oil phase was initiated by ultraviolet light to prepare a SiO2 / PMMA The composite microspheres were characterized by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The UV-induced Pickering Mechanism of Hollow Composite Microspheres Prepared by Emulsion Polymerization.