| 초록 |
In this work, a novel nanocomposites of poly(aniline-co-pyrrole) reduced graphene oxide coated silica particles was prepared by in-situ pre-polymerization method and characterized. The molar ratio of component monomers aniline:pyrrole was 1:3 and the pre-polymerization time was 30 min before the in-situ polymerization of the copolymer nanocomposites occured. The results revealed that the electromagnetic shielding performance of copolymer nanocomposites was significantly improved compared to that of component polymer nanocomposite. The minimum reflection loss (RLmin) of P(An-co-Py)/RGO@SiO2, PANi/RGO@SiO2 and PPy/RGO@SiO2 in Ku band were -40.6 dB, -38.9 dB and -13.9 dB, respectively. The effective absorption bandwidth of copolymer P(An-co-Py)/RGO@SiO2 was 5.5 GHz from 12.GHz to 17.8 GHz. Meanwhile, the effective aborption bandwidth of component polymer nanocomposites such as PANi/RGO@SiO2 was only 2.2 GHz from 15.8 GHz to 18GHz. |
