研究了原位改性对溶胶凝胶法制备的纳米二氧化硅的特性和应用性能的影响,结果表明原位改性改善了纳米二氧化硅的分散性,使纳米二氧化硅的粒径减小,分布更加均匀,外观形貌发生变化,但并不改变纳米二氧化硅的晶体结构和体相成分.其改性机理是纳米二氧化硅表面的物理吸附水和硅羟基被硅烷偶联剂的有机成分所代替.当硅烷偶联剂的用量适当时,制备的纳米二氧化硅在阴极电泳漆中具有良好的应用性能.
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