| 초록 |
Urchin-like polyaniline (PANI) microspheres with an average diameter of 2.5 μm were prepared by a self-assembly process from PANI nanowires using ammonium persulfate as oxidant in aqueous solution. The structure of the urchin-like PANI microspheres was characterized by scanning electron microscopy, FT-IR and XRD. The BET micropore area and conductivity of the dedoped urchin-like PANI porous microsphere at room temperature were measured to be 4.5 m2/g and 7.6×10-1 s/cm, respectively. The microspheres, dedoped to a low conductivity, were then applied as electro-responsive electrorheological (ER) materials dispersed in silicone oil. Its ER properties including shear stress, viscosity and dynamic modulus were investigated by using a rotational rheometer under applied electric field. |
