【摘要】 以阳离子聚氨酯 (PU )纳米粒子为纳米胶囊 ,利用原位合成法使正硅酸乙酯 (TEOS)在囊内水解、聚合生成二氧化硅 (SiO2 )纳米粒子 ,制备出二氧化硅 /聚氨酯 (SiO2 /PU )水性纳米复合物 ,该复合物在水性环氧树脂中能够很好地分散 ,通过动态光散射和其它测试方法对含有SiO2 /PU纳米复合物的水性环氧树脂电泳膜的物理性能进行测试。结果表明 ,在TEOS与PU的质量比为 30∶10 0时 ,SiO2 /PU水性纳米复合物在一定程度上提高了环氧树脂电泳膜的耐冲击性、附着力和抗腐蚀性 ,起到同步增韧增强的效果。更多还原

【Abstract】 The silica polyurethane(SiO 2/PU) nanocomposites, were prepared from cationic polyurethane ionomers as nanocapsules and tetraethoxysilane(TEOS) as precursor of SiO 2 by in-situ synthesis. The nanocomposites could be well dispersed in water-based epoxy resin. The physical properties of epoxy resin electrophoresis membrane mixed with SiO 2/PU nanocomposites were measured by dynamic light scattering and other methods. It was found that the physical properties such as impact strength, adhesive force and corrosion resistance of the SiO 2/PU nanocomposites were considerably improved. When the mass ratio of TEOS to PU was 30∶100.更多还原