| 초록 |
Highly ordered nanoparticle structures in polymeric materials have drawn extensive attention due to their collective properties which are not shown in randomly dispersed or aggregated structures. To achieve those structrues, polymer grafting onto paritlcees is generally require with self-assembling agent, which often involves complicated synthetic procedures. In this work, we report that highly ordered structures of particles can be achieved by simply dispersing them in poly(ethylene glycol) derivative solution. Even without chemical grafting and self-aseembling agent, the strong hydrogen bonding between nanoparticles and the PEG complex could retain the superstructures in the liquid-phase in the presence of water. We also found that the presece of water leads to the stronger rheological response. The systematic investigation was carried out by varying molecular weight/concentration of polymers/nanoparticles with small-angle X-ray scattering and oscillatory rheometer experiments. |
