| 초록 |
Graphene, a single layer of carbon atoms with excellent thermal, electrical, structural and mechanical properties, has attracted an extremely attention in many different areas. As a conducting polymer, polyaniline (PANI) in its emeraldine salt form possesses special favors due to its not only high conductivity, easy synthesis, high thermal stability and remarkable environment stability, but also good activity as electrorheological (ER) particles when dedoped to a low conducting state. In our work, conducting polymer, PANI was synthesized in the presence of colloidal graphene oxide (CGO), which was prepared via a modified Hummers method. Both SEM and TEM images confirm the changes on CGO surface due to the adding of PANI, the same conclusion was also found in Raman shift. Furthermore, the composite was examined as an ER material dispersed in silicone oil via both an optical microscope in an external electric field and a rotational rheometer in various electric field strengths. |
