| 초록 |
Anomalous nanoscale phenomena have extensively been reported in polymer nanocomposites including breakdown of Stokes-Einstein relation, expansion of polymer dimension, non-Einstein-like viscosity reduction. In order to observe these nanoscale phenomena, homogeneous dispersion of nanofiller is essential to generate nanoscale interfaces. In this study, we demonstrate two drastically different dispersion quality of iron oxide nanoparticles in thermoplastic polyurethane (TPU) matrix via conventional solvent evaporation and rapid precipitation techniques despite the identical chemical compositions of polymer nanocomposites. Remarkably, nanoscale interfaces in TPU nanocomposites by rapid precipitation prevented typical evolution of soft and hard segments of TPU supported by single TGA peak. We will also discuss soft robotics applications with these polymer nanocomposites and importance of the dispersion quality of nanoparticles. |
