| 초록 |
Carbon nanotubes (CNTs)/polymer composites have attracted much attention recently. Due to the strong π-π interactions among CNTs, however, it is not easy to obtain fine and stable dispersibility of CNTs, which is a critical issue in the continuous media, i.e., water, organic solvents, and various monomers. In this work, well-dispersible multi-walled CNTs were prepared using alkali-soluble resin (ASR) from three types of CNTs, such as, pristine, COOH-, and NH2-functionalized CNTs. Aggregate size and dispersion stability of the CNTs in water phase were measured using dynamic light scattering, turbidity, UV-visible spectrophotometer, and electron microscope, and compared with the CNT dispersions prepared with sodium dodecyl sulfate (SDS, anionic) and Pluronic P84 (non-ionic) surfactants. With these CNT aqueous solutions, CNT/PMMA nanocomposites were prepared using an emulsion polymerization of methyl methacrylate (MMA) and their morphologies were analyzed. |
