摘要
研究了以Span85/Tween80为表面活性剂的反胶束溶胶-凝胶法光聚合原位合成TiO2/聚丙烯酸酯纳米复合薄膜,考察了影响纳米复合薄膜光聚合反应速率的因素,并用原子力显微镜(AFM)对纳米复合薄膜的表面形态进行了表征。实验结果表明,减少溶水量和钛酸丁酯浓度、增大光引发剂浓度会增大复合薄膜光聚合反应速率和最终转化率。AFM结果表明平均尺寸为25 26nm的无机TiO2粒子均匀分散在有机相基体中,二氧化钛/聚丙烯酸酯复合薄膜的表面粗糙度参数Ra、Rz和Ry分别为1 529～2 263、4 691～16 69nm和10 60～18 97nm,表明所合成的纳米复合薄膜的表面粗糙度低,表面光滑平整,基本达到了纳米器件对表面精度的要求。
The synthesis of titania/polyacrylates nanocomposites via hydrolysis of titanium tetrabutoxide (TTB) by the sol-gel process in Span85/Tween80 reverse micelles and subsequent rapid photopolymerization were studied, and the process parameters that affected the photopolymerization rate were studied also by using Photo-DSC, as well as the inorganic/organic nanocomposite morphologies characterized by atom force microscopy. The results showed that the smaller the molar ratio of water to surfactant and TTB content as well as the higher the photoinitiator concentration, the higher the photopolymerization rate and the final conversion. AFM data demonstrated that the inorganic titania particles with mean diameter of 25.26 nm, were homogeneously distributed in the organic matrix; the surface roughness parameters of the inorganic/organic nanofilm, such as Ra, Rz and Ry, were 1.529 - 2.263 nm, 4.691 - 16.69 nm and 10.60 - 18.97 nm, respectively, indicative of a flat and slippery surface of the nanofilm.
出处
《现代化工》
EI
CAS
CSCD
北大核心
2005年第4期32-35,共4页
Modern Chemical Industry
