TiO2/聚丙烯酸酯光固化纳米复合薄膜的AFM表征

用原子力显微镜（AFM）表征了反胶束溶胶-凝胶法光聚合原位合成的TiO2／聚丙烯酸酯纳米复合薄膜的表面形态，研究了热处理时间和紫外光照时间对复合薄膜表面形貌的影响。结果表明，热处理有助于TiO2粒子的生成和薄膜的致密化，但薄膜的表面粗糙度波动不大；延长紫外光照时间，可以促进TiO2粒子的生成，填补薄膜表面的微孔，降低表面粗糙度。相区平均尺寸为21．57～38．29nm的无机TiO2粒子均匀分散在有机相基体中，得到的TiOz／聚丙烯酸酯纳米复合薄膜的表面粗糙度参数Ra、Rz和Ry分别为1．272～2．263nm、4．32416．69nm和9．71～19．39nm，表明所合成的纳米复合薄膜的表面粗糙度低、光滑平整。

AFM STUDY ON TITANIA-POLYACRYLATES NANOFILM SYNTHESIZED BY PHOTOPOLYMERIZATION

Effects of the post-thermal treatment and UV irradiation time on the surface morphologies of the titania-polyacrylates nanofilm, synthesized by sol-gel process in Span85/ Tween80 reverse micelles and subsequent rapid photopolymerization, were studied by AFM. The results demonstrated that the irradiation time and the post-thermal treatment promoted the formation of TiO2 particles and the film densifying, but the roughness of the nanofilm changed little during post-thermal treatment, while got smaller as the irradiation time of UV irradiation was prolonged. The inorganic TiO2 particles were homogeneously distributed in the organic matrix with mean diameter of 21.57--38.29 nm; the surface roughness parameters R,, Rz and Ry of the inorganic/organic nanofilm were 1. 272--2. 263 nm, 4. 324--16.69 nm and 9.71-- 19.39 nm, respectively, indicating a flat and slippery surface of the nanofilm.