Abstract: TiO₂ nanocrystals were adsorbed on the surface of natural halloysite nanotubes(HNTs) by means of sol-gel method to form the TiO₂ -HNTs composites, which effectively controlled the aggregation of TiO₂. The XRD and SEM indicated that TiO₂ nanocrystals were successfully adsorbed on the surface of HNTs. The composite epoxy coatings with different content of TiO₂ -HNTs were prepared. The properties of the composite coatings were evaluated by TGA, EIS and wear resistance test. The results indicated that wear resistance and corrosion re-sistance of the composite coatings were improved, and the comprehensive performance was optimal when the content of TiO₂-HNTs was 4wt.%.

Key words: halloysite nanotubes, titanium dioxide, adsorption, epoxy coatings

摘要：

通过溶胶凝胶法，在天然埃洛石纳米管（HNTs）外壁负载纳米 TiO₂ 晶粒，有效控制了纳米TiO₂ 粒子的团聚，获得了 HNTs 负载 TiO₂ 的杂化材料（TiO₂－HNTs）。 扫描式电子显微镜（ SEM）与 Ｘ射线衍射（XRD）分析结果表明，纳米 TiO₂粒子成功负载于 HNTs 表面。 分别制备了不同 TiO₂－HNTs含量的环氧树脂复合涂层，利用热重分析（TGA）、电化学交流阻抗（EIS）、耐磨性测试等表征了复合涂层的性能。 结果表明：环氧树脂复合涂层的耐磨性与耐腐蚀性相比于纯环氧树脂均有一定的提高，当TiO₂－HNTs 含量为 4%时，复合涂层的综合性能最佳。

关键词: 埃洛石纳米管, 二氧化钛, 负载, 环氧树脂涂料