仿贝壳结构的自组装有机-无机纳米复合薄膜的制备及结构表征

利用超分子自组装法在玻璃表面制备了聚合前后DMTB/SiO2和DMCB/SiO2复合薄膜.在所制备的复合薄膜中,表面活性剂DMTB和DMCB既作结构导向剂,又作聚合单体.用FTIR,XRD和TEM等表征了薄膜的结构.结果表明,所制备的薄膜具有有机-无机有序交替的层状结构.DMCB/SiO2和DMTB/SiO2复合薄膜有机层与无机层间的距离分别为聚合前3.48和3.44nm,聚合后2.84和2.92nm.

Preparation and Characterization of Self-assembled Organic-Inorganic Nacre-like Nanocomposite Thin Film

The DMCB/SiO 2 and DMTB/SiO 2 organic inorganic nanocomposite thin films were prepared by using super molecular self assembly method on glass substrate, with the surfactant DMCB and DMTB as both the structure directing agent and the monomer to be polymerized, respectively. The as deposited film was heated at a proper temperature and duration to allow the polymerization of the surfactant, which contributes to increasing the mechanical strength and stability of the film. The unpolymerized and polymerized films were characterized by FTIR, X ray diffraction, and TEM. A model was also suggested to illustrate the structure of the as deposited film. The results also indicated that heat treatment of the as deposited film led to polymerization of the organic phase and hence to increase the mechanical strength of the film. The results indicated that the films were composed of organic and inorganic layers with orderly interlaced arrangement and the distance between organic layer and inorganic layer was 3 48 nm(DMCB/SiO 2), 3 44 nm(DMTB/SiO 2) before polymerization and 2 84 nm(DMCB/SiO 2), 2 92 nm(DMTB/SiO 2) after polymerization, respectively. These films will be favourable for catalysis, optics and electronics or lubrication films.