中文摘要：

采用共混法制备了基于环氧丙烯酸酯（EA）的含纳米SiO2粒子的无机一有机紫外光固化复合涂层，并对其结构、热稳定性和物理性能进行了检测．结果表明，纳米SiO2粒子在涂层内部形成了含Si—O—Si的交联网络结构，这种结构有助于改善涂层的热稳定性．SiO2的质量分数为5％时，复合涂层的热稳定性最高．随着SiO2添加量的增加，复合涂层的光泽度降低．加入适量的纳米SiO2粒子可以提高涂层的硬度，当添加量为3％-5％时，复合涂层的铅笔硬度可以达到3H．

英文摘要：

UV curable inorganic-organic composite coatings containing SiO2 nanoparticles based on the epoxy acrylate （EA） were prepared by the blending method. The structure, thermal stability and physical properties of the composite coatings were investigated. The results indicated that Si--O--Si crosslinked network structures are generated in the coatings due to the incorporation of SiO2 nanoparticles, which contributed to improve the thermal stability of the coatings. The composite coating with 5% mass fraction of SiO2 nanoparticles exhibits the most excellent thermal stability. With the increase of the content of SiO2, the gloss of the coatings decreases. Moreover, the reasonable amounts of SiO2 addition can improve the hardness of the coatings. When the mass fraction of SiO2 is 3% - 5% , the composite coating exhibits 3H pencil hardness.