反胶束溶胶-凝胶和原位光聚合法合成二氧化钛/聚丙烯酸酯纳米复合薄膜

以Span85失水山梨醇三油酸酯/Tw een80聚氧乙烯失水山梨醇单硬脂酸酯为表面活性剂,采用反胶束溶胶-凝胶和原位光聚合法合成T iO2/聚丙烯酸酯纳米复合薄膜,用傅里叶变换红外光谱、X射线光电子能谱、紫外-可见光谱和原子力显微镜对纳米复合薄膜进行表征。实验结果表明,丙烯酸和钛形成的多齿配体在溶胶-凝胶和光聚合反应过程中较稳定,原位形成的羧酸钛配位键增大了有机相和无机相的相容性,有效地避免宏观的相分离;钛酸丁酯转化为T iO2;平均粒径为25.26nm的无机T iO2粒子均匀分散在有机相基体中;纳米复合薄膜的表面光滑平整、粗糙度低,达到了纳米器件对表面精度的要求。

Titania- Polyacrylate Nanocomposite Membrane Synthesized by Sol- Gel Method in Reverse Micelles and In- Situ Photopolymerization

TiO_2/polyacrylates nanocomposite membrane was synthesized by sol-gel process in Span85 sorbitan trioleate/Tween80 polyoxyethylene sorbitan monostearate reverse micelles and in-situ photopolymerization and characterized by means of FTIR,XPS UV-Vis and AFM.Bidentate ligand between titanium and carboxy group remained stable during sol-gel process and subsequent photopolymerization,and carboxy group in acrylic acid acted as both chelating and bridging bidentate coordination mode,and thus compatibility between organic phase and inorganic phase increased.XPS data showed formation of titania during preparation of nanocomposite membrane.AFM data demonstrated that inorganic titania particles with mean diameter of 25.26nm were homogeneously distributed in organic matrix.The surface of nanocomposite membrane was flat and slippery and surface roughness was low.