采用改进的St(o)ber溶胶凝胶法制备聚苯乙烯(PS)/氧化硅(Silica)复合微球,研究了添加油酸对复合微球形貌的影响.微球在经过500℃高温煅烧后,得到氧化硅空心微球.应用HPPS、Zeta电位分析、TEM、SEM、氮气吸附等手段对空心微球进行研究,证实了在包裹过程中油酸与氨水作用生成的油酸铵吸附在聚苯乙烯微球表面,增加模板微球表面电势从而有利于氧化硅粒子在其表面成核生长.此外油酸与硅羟基之间形成氢键增加氧化硅的生长点,增加了氧化硅壳层的密实程度.
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