| 초록 |
Electronic devices are everywhere, and they are only going to become even more ubiquitous in our daily life. Electromagnetic interference (EMI) shielding is the practice of using conductive or magnetic materials to reduce incoming or outgoing electromagnetic (EM) fields in a space by blocking or guarding against the EM field. In this study, we investigate the influences of types and contents of Fe2O3 and Fe3O4 nanoparticles on the EMI shielding performance of eco-friendly and flexible waterborne polyurethane (WPU)-based composite films. For this purpose, a WPU is synthesized and its composite films with different iron oxide contents are fabricated via casting method. The morphology and microstructure of WPU composite films with iron oxide nanoparticles are characterized by using SEM, XRD, and FT-IR. The dielectric, electrical and EMI shielding properties of the composite films are investigated with the aids of impedance analyzer, electrometer, and network analyzer, respectively. |
