| 초록 |
Polymer nanocomposites incorporated with electrically conductive nanofillers can be applied to high performance composite materials. Silver nanowire (AgNW) synthesized by polyol method has excellent electrical conductivity and high aspect ratio and is used to develop conductive nanocomposite materials. In this study, rheological and electrical properties of the nanocomposites were investigated according to aspect ratio after synthesizing AgNWs with different aspect ratios. The nanocomposites were prepared by dispersing AgNWs in polystyrene (PS) particle suspension and freeze-drying the PS/AgNW mixture using latex technology. SEM, UV-vis, TGA, and XPS were used to confirm that the surface of AgNW was covered by poly(vinyl pyrrolidone), which made excellent dispersion. After freeze-drying and molding, uniform AgNW dispersion was maintained in PS matrix. Electrical percolation threshold decreased with aspect ratio, and rheological and electrical properties increased with AgNW content. |
