| Polymer nanocomposites were prepared by uniformly dispersing the nano-particles into the polymer matrix. Due to the high surface area, nano-particles are very easy to agglomerate and lose a variety of special properties of nano-particles, which results difficulties in the preparation, preservation and applications of nano-particles. In this paper, aim at the current situation for dispersion difficulties exist in the preparation of polymer nano-composite film process, the basic research is carried out on the dispersion of nano-particles in ionic liquid and polymer matrix.1. Study on the dispersion mechanism of nano-particles in ionic liquids. The dispersion of a variety of nano Cu in ionic liquid [emim]BF4 by ultrasonic. The effect of Cu nano-particles content on the dispersion effect was analyzed by using FT-IR and UV-vis, TEM and SEM.2. Preparation of polymer nanocomposite thin films based on PMMA and PS. PMMA and PS polymer as the matrix, Cu-[emim]BF4 as additive, new type of polymer composite films have been prepared. The dispersion effect was analyzed by FT-IR and SEM. The optical, electrical properties and thermal stability of the composite films were analyzed by UV-vis, electrical conductivity and TGA.3. Research of polymer nanocomposite films based on the PMMS and nano silver. Mercaptopropyl methyl siloxane, wihich is rich in thiol groups, was used as the base, imidazolium salt ionic liquid to disperse nano-silver, the PMMS/AAIM /Nano Ag composite film was prepared by the UV-curable cross-linking method. In this study, the interaction force between AAIm-Ag was analyzed by FT-IR, and the thermal stability of the polymer composite film was characterized by TGA.In this study, according to the experimental analysis, the coordination mechanism was proposed. This mechanism can not only well explain the role of nano Cu and [emim]BF4 ionic liquid, but also obtained the very good verification in the preparation of PMMA, PS, and PMMS polymer matrix composite film. This study is helpful in solving the problem of agglomeration of nano-composite polymer process, improving the conductivity and thermal stability of composite films, and expanding UV absorption of the polymers such as PMMA and PS. |
